期刊
  出版年
  关键词
结果中检索 Open Search
Please wait a minute...
选择: 显示/隐藏图片
1. 光照强度对橘小实蝇性行为的调控作用
REN Cong, ZHANG Jie, YUAN Jin-xi, WU Yun-qi-qi-ge, YAN Shan-chun, LIU Wei, WANG Gui-rong
Journal of Integrative Agriculture    2023, 22 (9): 2772-2782.   DOI: 10.1016/j.jia.2023.04.025
摘要193)      PDF    收藏

橘小实蝇(Bactrocera dorsalis (Hendel))是柑橘类水果的毁灭性虫害。雌虫在成功交配后将卵产入成熟果实,导致其发霉腐烂失去经济价值,从而严重危害柑橘产业。自然条件下的橘小实蝇交配时间发生于黄昏时段,此时下降的光照强度是诱发其交配的关键条件。本研究首先通过设置0-30000lux共10种光照强度,从而确定何种光强能够明显调控橘小实蝇的交配行为。进一步选择了三种明显调控其行为的光照强度,测试了这些光照强度对雄虫求偶(振翅)及雌虫对性信息素2,3,5-三甲基吡嗪(2,3,5-trimethylpyrazine TMP)趋向性的影响。最后,在实验室中将强光和黑暗条件人工组合,测试其是否可以阻止橘小实蝇的交配,以期待为未来橘小实蝇的行为调控提供理论基础。结果表明,橘小实蝇成虫能在较低光照(<1000lux)正常交配,光强越强其交配数量越低,在光强达到20000lux以上时几乎无交配。较强光强明显减弱并推迟了雄虫的振翅行为与雌虫对TMP的趋向行为,不同的是雄虫在10000lux下仍有一定程度的振翅,而雌虫在此光强下对TMP几乎无趋向行为。成虫在无光情况下无交配行为,在此过程中雄虫无振翅行为而雌虫则对TMP失去趋向行为。进一步模拟不利光照条件,在强光10000lux一小时后持续无光,橘小实蝇成虫不进行交配。因此,光照条件是对橘小实蝇求偶交配的重要条件,未来可通过人工改变光强或其他手段干扰橘小实蝇成虫感弱光的分子靶标调控其求偶交配行为,从而开发新型绿色的橘小实蝇防控技术。

参考文献 | 相关文章 | 多维度评价
2. 基于8个鸡品种的全基因组SNP解析品种特征形成的遗传基础
WANG Jie, LEI Qiu-xia, CAO Ding-guo, ZHOU Yan, HAN Hai-xia, LIU Wei, LI Da-peng, LI Fu-wei, LIU Jie
Journal of Integrative Agriculture    2023, 22 (7): 2200-2212.   DOI: 10.1016/j.jia.2022.11.007
摘要210)      PDF    收藏

世界范围内有各种品种、类型的鸡,它们的品种特征各不相同,是宝贵的遗传资源。目前,对影响这些鸡品种的特异性表型的遗传决定因素的研究还有待进一步加深。深入了解品种特异性表型变异的潜在遗传机制可以帮助育种者培育和改良鸡品种。本研究对7个来自山东省的本地品种共140只鸡和20只引进的隐性白羽鸡的全基因组进行了重测序。基于常染色体单核苷酸多态性(SNPs)的群体基因组比较结果揭示了鸡群基于地理距离的聚类模式。通过全基因组范围内的选择性清除分析,本研究确定了甲状腺刺激激素受体(TSHR,繁殖性状,生理节律),红细胞膜蛋白带4.1 样 1 (EPB41L1,体型大小)和烷基甘油单加氧酶(AGMO,攻击行为)是主要候选的鸡品种特异性决定基因。此外,本研究利用机器学习分类模型,基于与品种特征显著相关的SNPs对鸡的品种进行判别,预测准确率为92%,可有效实现莱芜黑鸡的品种鉴定。本研究首次提供了山东地方鸡种的完整基因组数据,相关的分析揭示了山东地方鸡种的地理模式和鸡的品种特异性性状相关的潜在的候选基因。此外,本研究开发了一个基于机器学习的预测模型,使用SNPs数据进行品种判别,该部分内容为利用机器学习方法开发品种分子身份证提供了参考。本研究揭示的地方鸡品种遗传基础有助于更好地理解鸡资源特性的内在机制。

 

参考文献 | 相关文章 | 多维度评价
3. 挥发性代谢组和转录组揭示大花粉晕香水月季花香释放节律及分子机制
ZHOU Li-jun, HUANG Run-huan, LIU Ting-han, LIU Wei-chao, CHEN Yun-yi, LU Pei-feng, LUO Le, PAN Hui-tang, YU Chao, ZHANG Qi-xiang
Journal of Integrative Agriculture    2023, 22 (7): 2111-2125.   DOI: 10.1016/j.jia.2023.06.015
摘要263)      PDF    收藏

月季是世界上最重要的观赏植物之一,极高食用和药用价值,还全世界范围广泛种植用来提取精油。本研究采用固相微萃取(SPME)和气相色谱-质谱(GC-MS)联用法对在云南西北地区发现的具有甜香的新物种——大花粉晕香水月季(Rosa yangii不同开花阶段的花香成分进行提取和分析。共检测到113种挥发性有机化合物,从中筛选出69芳香挥发物我们发现大花粉晕香水月季的花朵在初开期产生和释放挥发性有机物明显高于其他开放阶段阶段合成并保留了大量的花香组分说明在工业生产更适合在初开期采收花朵。气味活性值(OAV)分析表明,大花粉晕香水月季的主要芳香成分包括丁香酚、甲基丁香醇、苯乙醛和苯乙醇、庚醛、癸醛、(E-2-己烯-1-基乙酸酯、石竹烯等。代谢组和时序基因共表达网络(TO-GCN联合分析显示,苯类/苯丙类挥发性有机化合物合成途径上的基因和有机挥发物其浓郁甜香起主要调控作用。MYBbHLH可能是调控丁香酚合成酶(EGS)异丁香酚合成酶(IGS)合成进而影响花香重要转录因子。综上所述,本研究可为观赏植物芳香分子育种提供科学依据,并促进植物精油新原料在食品储藏、芳香疗法、化妆品和香料行业的开发利用。

参考文献 | 相关文章 | 多维度评价
4. 发芽糙米通过改善肠道微生物群失调缓解高脂血症
REN Chuan-ying, ZHANG Shan, HONG Bin, GUAN Li-jun, HUANG Wen-gong, FENG Jun-ran, SHA Di-xin, YUAN Di, LI Bo, JI Ni-na, LIU Wei, LU Shu-wen
Journal of Integrative Agriculture    2023, 22 (3): 945-957.   DOI: 10.1016/j.jia.2023.02.015
摘要236)      PDF    收藏

高脂血症是一种与饮食相关的常见代谢紊乱疾病。人们认为含有层和胚芽的糙米有助于缓解高脂血症。本研究通过高脂饮食建立了高脂血症大鼠模型,通过该模型在血脂、脂肪酶、载脂蛋白和炎症方面探索了发芽糙米(Gbrown)和发芽黑米(一种发芽的黑色糙米,Gblack)的降血脂潜力。进而通过16S rDNA测序测定了接受不同饮食干预高脂血症大鼠的肠道微生物。本研究结果发现,GbrownGblack均可减轻大鼠的高脂血症,表现出降低TCTGLDL-C和载脂蛋白B,以及升高HDL-CHLLPLLCAT和载脂蛋白质A1的效果Gbrown/Gblack还可以减轻高脂血症大鼠的炎症,表现出TNF-αIL-6ET-1的降低。同时,16S rDNA测序发现Gbrown/Gblack饮食提高了高脂血症大鼠肠道微生物的丰度和多样性。在门级水平,Gbrown/Gblack在高脂血症大鼠中降低了厚壁菌门(Firmicutes),增加了拟杆菌门(Bacteroidetes),并降低了F/B比率。在属级水平,Gbrown/Gblack在高脂血症大鼠中降低了链球菌属(Streptococcus),并增加了瘤胃球菌属(Ruminococcus)和异杆菌属(Allobaculum)。同时,本研究还确定一些与脂质代谢相关的差异微生物属,如Gblack组中的LachnospiraceaeRuminococcusGbrown组中的PhascolarctobacteriumDoreaTuricibacterEscherichia Shigella。值得注意的是,Gblack对高脂血症的有益效果强于Gbrown。总之,Gbrown/Gblack的饮食干预可以通过减轻肠道微生物的失调有助于缓解高脂血症。

参考文献 | 相关文章 | 多维度评价
5. JIA-2021-1314 农艺措施通过影响降水利用过程中的不同阶段来改善旱作小麦的降水利用效率
YANG Wen-jia, LI Yu-lin, LIU Wei-jian, WANG Shi-wen, YIN Li-na, DENG Xi-ping
Journal of Integrative Agriculture    2023, 22 (1): 92-107.   DOI: 10.1016/j.jia.2022.08.102
摘要280)      PDF    收藏
在旱地作物生产中,低的降水利用效率(PUE)是导致其作物减产的重要原因之一。一般而言,PUE的高低取决于一个连续的、包含几个阶段的水分转化过程:即降水入渗到土壤中,入渗的降水被土壤储存,储存的降水通过蒸腾或蒸发被消耗,蒸腾消耗的降水被用于生产干物质,干物质重新转运分配至籽粒。这些阶段可以通过六个比率来量化:即降水入渗率(SW/SWe;SW,总有效水量,SWe,特定时期结束时的土壤有效储水量),降水留存率(SWe/P;P,有效降水),降水消耗率(ET/SW;ET,作物耗水量),蒸腾比率(T/ET;T,作物蒸腾量),蒸腾效率(B/T;B,地上部干物质增量)和收获指数(Y/B;Y,经济产量)。基于以上比率,PUE可以通过下述公式进行计算,即PUE=SWe/P×SW/SWe×ET/SW×T/ET×B/T×Y/B。在一个特定的生产体系中,量化这些比率有利于通过优化相应的农艺措施,进而有计划地改善PUE。在本研究中,我们量化并评估了四个农艺措施管理体系下的PUE的各个比率。结果表明,与传统的农民体系和高氮体系相比,施用有机肥或生物炭体系下的PUE和小麦产量显著提高了8–31%。相比于农民和高氮体系:在入渗和储存阶段,有机肥和生物炭体系降低了降水留存率,但提高了降水入渗率;在消耗阶段,由于返青期前耗水量减少而返青期后耗水量增加,施用有机肥和生物炭体系下的全年降水消耗率并未增加,但蒸腾比率显著提高;在最后两个阶段,蒸腾效率和收获指数仅在不同年际间差异较大,受不同处理的影响较小。因此,若想通过优化农艺措施提高旱地小麦PUE和产量,应着重于增加蒸腾比率及降水入渗率,同时保持全年降水消耗率不变以及收获时相对较低的降水留存率。


参考文献 | 相关文章 | 多维度评价
6. JIA-2021-1156 小麦背景下冰草2P染色体易位片段的遗传效应
XU Shi-rui, JIANG Bo, HAN Hai-ming, JI Xia-jie, ZHANG Jin-peng, ZHOU Sheng-hui, YANG Xin-ming, LI Xiu-quan, LI Li-hui, LIU Wei-hua
Journal of Integrative Agriculture    2023, 22 (1): 52-62.   DOI: 10.1016/j.jia.2022.08.094
摘要196)      PDF    收藏
小麦野生近缘植物冰草中蕴含许多对小麦遗传改良有利的基因。小麦-冰草2P异源易位系携带有小旗叶、小穗排列紧密、株型紧凑等特异性状。本文对携带有小麦-冰草不同2P易位片段的易位系及易位系回交群体进行农艺性状调查和遗传分析,结果表明,易位系2PT-3(2PL)易位片段具有促使旗叶长度变小的作用,易位系2PT-3(2PL)、2PT-5(2PL(0.6-1))易位片段具有促使旗叶宽度变小的作用。易位系2PT-13(2PS(0.18–0.36))易位片段具有增加旗叶的长度和面积的作用。易位系2PT-3(2PL)、2PT-8(2PL(0.86-1))易位片段具有促使小穗密度变大的作用。易位系2PT-7(2PL(0.0-0.09))、2PT-8(2PL(0.86-1))、2PT-10(2PS)、2PT-13(2PS(0.18-0.36))易位片段具有降低株高的作用。本研究可为小麦-冰草易位系的有效利用提供科学依据。
参考文献 | 相关文章 | 多维度评价
7.

The metabolomics variations among rice, brown rice, wet germinated brown rice, and processed wet germinated brown rice

REN Chuan-ying, LU Shu-wen, GUAN Li-jun, HONG Bin, ZHANG Ying-lei, HUANG Wen-gong, LI Bo, LIU Wei, LU Wei-hong
Journal of Integrative Agriculture    2022, 21 (9): 2767-2776.   DOI: 10.1016/j.jia.2022.07.025
摘要178)      PDF    收藏

本研究以华北玉麦轮作农田石灰性土壤为研究对象,针对玉米和小麦季的两次施肥事件,采用15N气体通量法(15NGF)对田间原位土壤N2通量进行为期一周的观测。施用肥料为15N标记尿素(丰度为99 atom%),施用量为130(玉米季)和150(小麦季)kg N ha–1;并于施肥后的第一、三和五天(缩写DAF 1、DAF 3和DAF 5)进行模拟灌水,控制灌水后土壤湿度达~60% WFPS。结果显示:当罩箱时间为2、4和6 h时,土壤N2通量的检测限分别为163–1565、81–485和54–281 μg N m–2 h–1。土壤N2通量为159–2943(平均:811)μg N m–2 h–1,98.3%的通量数据高于其检测限(即120个观测数据中仅2个达不到通量检测限)。灌溉时间显著影响玉米季观测期内的土壤N2平均通量,DAF 3处理较DAF 1和DAF 5处理高约80%(p<0.01);而在小麦季,不同灌溉时间的N2通量无差异。而且,玉米季观测期内的N2通量和氧化亚氮(N2O)与N2产物比(N2O/(N2O+N2))均较小麦季高约65%和11倍(p<0.01)。该差异主要归因于玉米季观测期内更高的土壤湿度、温度和氮底物的有效性,利用反硝化贡献N2排放和N2O/(N2O+N2)比值。该研究表明15NGF方法可应用于原位定量集约化石灰性农田土壤的N2通量


参考文献 | 相关文章 | 多维度评价
8. 田间霉变诱发大豆籽粒中贮藏的物质分解并导致大豆品质劣变
DENG Jun-cai, LI Xiao-man, XIAO Xin-li, WU Hai-jun, YANG Cai-qiong, LONG Xi-yang, ZHANG Qi-hui, Nasir Iqbal, WANG Xiao-chun, YONG Tai-wen, DU Jun-bo, YANG Feng, LIU Wei-guo, ZHANG Jing, WU Xiao-ling, WU Yu-shan, YANG Wen-yu, LIU Jiang
Journal of Integrative Agriculture    2022, 21 (2): 336-350.   DOI: 10.1016/S2095-3119(20)63594-8
摘要204)      PDF    收藏

连阴雨天气导致田间湿度增大,诱发田间霉菌的生长繁殖,并侵染农作物导致田间霉变的发生。在大豆生长后期,因连阴雨天气导致的田间霉变严重影响大豆的产量和品质。为探究田间霉变诱导大豆品质劣变的机制,本研究利用人工降雨室模拟连阴雨天气,诱发大豆籽粒田间霉变,结合转录组学和多种代谢检测平台,解析田间霉变胁迫下大豆品质劣变的生化机理。研究结果表明,田间霉变影响大豆的外观品质,霉变大豆籽粒皱缩、变形,并出现霉斑。田间霉变使大豆籽粒中蛋白质、多糖等储藏性物质的含量降低,导致籽粒百粒重显著下降。转录组分析发现,田间霉变使大豆籽粒中氨基酸代谢、糖酵解、三羧酸循环、脂肪酸β氧化等初生代谢过程加强。代谢组分析结果也表明,霉变大豆籽粒中多氨基酸、糖类物质、有机酸的含量显著增加,而脂肪酸的含量显著下降。与此同时,大豆异黄酮作为一重要的抗逆活性物质,其生物合成在转录水平和代谢水平均受到田间霉变的诱导。田间霉变诱发大豆籽粒的防御机制,通过分解和消耗储藏性物质为防御体系的构建提供能量和底物,但储藏性物质的消耗导致大豆品质劣变。本研究为深入了解大豆籽粒田间霉变的机制提供了重要的理论基础,同时也为田间霉变大豆品种筛选指明方向

参考文献 | 相关文章 | 多维度评价
9. JIA-2021-0906
YU Xiao-qi, XIE Wei, LIU He, LIU Wei, ZENG Da-li, QIAN Qian, REN De-yong
Journal of Integrative Agriculture    2022, 21 (11): 3103-3113.   DOI: 10.1016/j.jia.2022.07.059
摘要240)      PDF    收藏
叶片是植物的主要光合作用器官,最佳的叶片形态有利于塑造理想株型,提高光合效率。在超高产杂交水稻模型中,袁隆平先生将水稻功能叶的形状归纳为直立、狭窄、厚实、卷曲。叶片的适度卷曲有助于其保持直立,减少阳光对叶片的辐射,并降低对叶片的损害,提高植物抵抗力,增加光合产物积累,从而提高作物产量。该研究发现srl3突变体在整个生育期都表现出半卷叶的表型,在分蘖期,其剑叶、第二叶、第三叶的叶片卷曲指数分别平均达到了41%、26%、14%。组织形态学分析发现srl3的剑叶在近轴面上位于中脉、大维管束及小维管束之间的泡状细胞数目和面积均显著性降低。石蜡切片和扫描电镜观察均发现部分小维管束对应的叶片背面缺少厚壁细胞,这些可能都是导致srl3半卷叶表型的原因。另外,我们还检测了一些卷叶相关以及细胞增殖扩展相关基因的表达水平,发现其中大部分基因的表达量都发生了显著性改变,说明SRL3基因很可能与这些卷叶及细胞增殖扩展相关基因有关,共同影响及调控水稻叶片形态。
参考文献 | 相关文章 | 多维度评价
10. Cuticular protein gene LmACP8 is involved in wing morphogenesis in the migratory locust, Locusta migratoria
ZHAO Xiao-ming, YANG Jia-peng, GOU Xin, LIU Wei-min, ZHANG Jian-zhen
Journal of Integrative Agriculture    2021, 20 (6): 1596-1606.   DOI: 10.1016/S2095-3119(20)63248-8
摘要115)      PDF    收藏

表皮蛋白是昆虫表皮关联器官的主要组成部分,如体壁和翅,然而其在渐变态昆虫翅发育中的功能尚不清楚。本文从飞蝗中鉴定出一种属于CPR 家族RR-2亚家族的翅表皮蛋白LmACP8。LmACP8主要在翅芽中表达,且在三龄、四龄和五龄若虫蜕皮前表达量较高,其编码的蛋白定位于翅芽和成虫翅的原表皮层。利用RNA干扰,LmACP8的表达缺失显著降低了其蛋白质含量,从而导致飞蝗若虫向成虫转变过程中翅形态发生异常。进一步研究证实这种异常形态发生是由于翅内皮层严重受损所致。个体实验结果发现,蜕皮激素(20-hydroxyecdysone,20E)能够抑制LmACP8的表达,而在干扰激素受体基因LmHR39(Hormone receptor 39)后,LmACP8表达显著上调。由此可见,LmACP8参与飞蝗若虫向成虫转变过程中翅的发育,且其表达受LmHR39介导的20E信号通路负调控。


参考文献 | 相关文章 | 多维度评价
11. Transcriptomic insights into growth promotion effect of Trichoderma afroharzianum TM2-4 microbial agent on tomato plants
ZHAO Juan, LIU Ting, LIU Wei-cheng, ZHANG Dian-peng, DONG Dan, WU Hui-ling, ZHANG Tao-tao, LIU De-wen
Journal of Integrative Agriculture    2021, 20 (5): 1266-1276.   DOI: 10.1016/S2095-3119(20)63415-3
摘要157)      PDF    收藏

植物促生真菌具有产生生物活性物质、促进植物生长以及增强植物免疫抗性的能力,其作为有应用价值的有益微生物在作物栽培中受到越来越多关注。本研究从健康番茄植株根际土壤中分离筛选到一株木霉菌株TM2-4,将其鉴定为非洲哈茨木霉(Trichoderma afroharzianum)。菌株TM2-4发酵滤液中含有多种生物活性物质且对番茄种子发芽具有明显促进作用,发酵滤液100倍稀释液处理,番茄胚轴、胚根长度,种子活力指数分别增加28.7%、19.4% 和 62.1%。为了评价菌株TM2-4的促生作用及其相关机制,通过盆栽试验和转录组测序分析了非洲哈茨木霉菌制剂TM2-4处理对番茄植株生物学指标和基因表达型的影响。结果表明,非洲哈茨木霉TM2-4能够通过在植株根际土壤和根系有效定殖,显著提高番茄株高、干重、单株叶片数及根系活力等生物学指标。转录组分析发现,木霉菌制剂处理番茄根系较对照共获得984个差异表达基因,主要集中在激素平衡、抗氧化活性以及苯丙烷类生物合成和谷胱甘肽代谢等生物学过程。相关研究结果为阐明菌株TM2-4对番茄的促生作用机制提供有效信息,并为非洲哈茨木霉微生物菌剂在蔬菜作物生产中的进一步开发应用奠定理论基础。


参考文献 | 相关文章 | 多维度评价
12. Principles and practices of the photo-thermal adaptability improvement in soybean
ZHANG Li-xin, LIU Wei, Mesfin Tsegaw, XU Xin, QI Yan-ping, Enoch Sapey, LIU Lu-ping, WU Ting-ting, SUN Shi, HAN Tian-fu
Journal of Integrative Agriculture    2020, 19 (2): 295-310.   DOI: 10.1016/S2095-3119(19)62850-9
摘要204)      PDF    收藏
As a short-day (SD) and thermophilic plant, soybean (Glycine max (L.) Merr.) is sensitive to photo-thermal conditions.  This characteristic severely limits the cultivation range of a given soybean cultivar and affects the performances of agronomic traits such as yield, plant architectures, and seed quality.  Therefore, understanding the mechanism of photo-thermal sensitivity will provide a theoretical basis for soybean improvement.  In this review, we introduce the advances in physiological, genetic, and molecular researches in photoperiodism of soybean, and progress in the improvement of the photo-thermal adaptability.  We also summarize the photo-thermal conditions and characteristics of widely-planted soybean cultivars of major production regions in China.  Furthermore, we proposed a novel concept of ‘ecotyping’ and the strategies for widely-adapted soybean cultivar breeding.  This review provides an important guide for improving the adaptability of soybean.
 
相关文章 | 多维度评价
13. Rejuvenating soybean (Glycine max L.) growth and development through slight shading stress
WEN Bing-xiao, Sajad Hussain, YANG Jia-yue, WANG Shan, ZHANG Yi, QIN Si-si, XU Mei, YANG Wen-yu, LIU Wei-guo
Journal of Integrative Agriculture    2020, 19 (10): 2439-2450.   DOI: 10.1016/S2095-3119(20)63159-8
摘要123)      PDF    收藏
The impact of increased shading stress on agronomic traits, photosynthetic performance and antioxidants activities in leaves of two soybeans cultivars (D16 and E93) was studied.  Soybean seedlings were grown in pots and exposed to no shade (S0), slight shade (S1), moderate shade (S2), and heavy shade (S3).  Our findings showed that under the S3 in both cultivars, leaf fresh weight (LFW), specific leaf area (SLA) and leaf thickness decreased significantly, accompanied by a reduction in photochemical parameters including the maximum quantum yield (Fv/Fm) and electron transport rate (ETR).  Furthermore, compared to S0, S1 significantly increased the ETR, sucrose content and the activity of catalase (CAT) in both D16 and E93 cultivars while S2 and S3 decreased the activity.  However, under all treatments of shading stress, the antioxidant activities of superoxide dismutase (SOD) and peroxidase (POD) were lowered in both cultivars.  Such morphological and physiological plasticity to adapt S1 compensates for the decrease in biomass and leads to seed weight compared to that obtained with an amount of normal light.  Through configuring the space in the intercropping systems, S1 could be helpful for optimum growth and yield.  Redesigning photosynthesis through S1 for the intercropping systems could be a smart approach.
参考文献 | 相关文章 | 多维度评价
14. iTRAQ protein profile analysis of soybean stems reveals new aspects critical for lodging in intercropping systems
LIU Wei-guo, WEN Bing-xiao, ZHOU Tao, WANG Li, GAO Yang, LI Shu-xian, QIN Si-si, LIU Jiang, YANG Wen-yu
Journal of Integrative Agriculture    2019, 18 (9): 2029-2040.   DOI: 10.1016/S2095-3119(18)62123-9
摘要144)      PDF    收藏
Soybean is often intercropped with maize, sugarcane, and sorghum.  Because of the shade coming from the latter, the soybean stem lodging is often a very serious problem in intercropping systems.  The aim of this study is to characterize the possible mechanisms in the stem of shade-induced promotion of seedling soybean lodging in intercropping systems at the proteome level.  We found that the soybean stem became slender and prone to lodging when it was planted with maize in an intercropping system.  The inhibition of lignin biosynthesis and lack of photosynthate (soluble sugar) for the biosynthesis of the cell wall led to the lower internode breaking strength.  A total of 317 proteins were found to be affected in the soybean stem in response to shade.  Under the shade stress, the down-expression of key enzymes involving the phenylpropanoid metabolic pathway inhibited lignin biosynthesis.  The up-regulation of expansin and XTHs protein expression relaxed the cell wall and promoted the elongation of internodes.  Although the expression of the enzymes involving sucrose synthesis increased in the soybean stem, the lack of a carbon source prevented rapid stem growth.  This metabolic deficit is the principal cause of the lower cellulose content in the stem of intercropped soybean, which leads to weakened stems and a propensity for lodging.
参考文献 | 相关文章 | 多维度评价
15. Effects of maize-soybean relay intercropping on crop nutrient uptake and soil bacterial community
FU Zhi-dan, ZHOU Li, CHEN Ping, DU Qing, PANG Ting, SONG Chun, WANG Xiao-chun, LIU Wei-guo, YANG Wen-yu, YONG Tai-wen
Journal of Integrative Agriculture    2019, 18 (9): 2006-2018.   DOI: 10.1016/S2095-3119(18)62114-8
摘要163)      PDF    收藏
Maize-soybean relay intercropping is an effective approach to improve the crop yield and nutrient use efficiency, which is widely practiced by farmers in southwest of China.  To elucidate the characteristics of different planting patterns on crop nutrient uptake, soil chemical properties, and soil bacteria community in maize-soybean relay intercropping systems, we conducted a field experiment in 2015–2016 with single factor treatments, including monoculture maize (MM), monoculture soybean (MS), maize-soybean relay intercropping (IMS), and fallow (CK).  The results showed that the N uptake of maize grain increased in IMS compared with MM.  Compared with MS, the yield and uptake of N, P, and K of soybean grain were increased by 25.5, 24.4, 9.6, and 22.4% in IMS, respectively, while the N and K uptakes in soybean straw were decreased in IMS.  The soil total nitrogen, available phosphorus, and soil organic matter contents were significantly higher in IMS than those of the corresponding monocultures and CK.  Moreover, the soil protease, soil urease, and soil nitrate reductase activities in IMS were higher than those of the corresponding monocultures and CK.  The phyla Proteobacteria, Acidobacteria, Chloroflexi, and Actinobacteria dominated in all treatments.  Shannon’s index in IMS was higher than that of the corresponding monocultures and CK.  The phylum Proteobacteria proportion was positively correlated with maize soil organic matter and soybean soil total nitrogen content, respectively.  These results indicated that the belowground interactions increased the crop nutrient (N and P) uptake and soil bacterial community diversity, both of which contributed to improved soil nutrient management for legume-cereal relay intercropping systems.
参考文献 | 相关文章 | 多维度评价
16. GmNMH7, a MADS-box transcription factor, inhibits root development and nodulation of soybean (Glycine max [L.] Merr.)
MA Wen-ya, LIU Wei, HOU Wen-sheng, SUN Shi, JIANG Bing-jun, HAN Tian-fu, FENG Yong-jun, WU Cun-xiang
Journal of Integrative Agriculture    2019, 18 (3): 553-562.   DOI: 10.1016/S2095-3119(18)61992-6
摘要266)      PDF(pc) (1031KB)(220)    收藏
As an important food crop and oil crop, soybean (Glycine max [L.] Merr.) is capable of nitrogen-fixing by root nodule.  Previous studies showed that GmNMH7, a transcription factor of MADS-box family, is associated with nodule development, but its specific function remained unknown.  In this study, we found that GmNMH7 was specifically expressed in root and nodule and the expression pattern of GmNMH7 was similar to several genes involved in early development of nodule (GmENOD40-1, GmENOD40-2, GmNFR1a, GmNFR5a, and GmNIN) after rhizobia inoculation.  The earlier expression peak of GmNMH7 compared to the other genes (GmENOD40-1, GmENOD40-2, GmNFR1a, GmNFR5a, and GmNIN) indicated that the gene is related to the nod factor (NF) signaling pathway and functions at the early development of nodule.  Over-expression of GmNMH7 in hairy roots significantly reduced the nodule number and the root length.  In the transgenic hairy roots, over-expression of GmNMH7 significantly down-regulated the expression levels of GmENOD40-1, GmENOD40-2, and GmNFR5α.  Moreover, the expression of GmNMH7 could respond to abscisic acid (ABA) and gibberellin (GA3) treatment in the root of Zigongdongdou seedlings.  Over-expressing GmNMH7 gene reduced the content of ABA, and increased the content of GA3 in the positive transgenic hairy roots.  Therefore, we concluded that GmNMH7 might participate in the NF signaling pathway and negatively regulate nodulation probably through regulating the content of GA3.
 
参考文献 | 相关文章 | 多维度评价
17. Weak stem under shade reveals the lignin reduction behavior
Sajad Hussain, Nasir Iqbal, PANG Ting, Muhammad Naeem Khan, LIU Wei-guo, YANG Wen-yu
Journal of Integrative Agriculture    2019, 18 (3): 493-505.   DOI: 10.1016/S2095-3119(18)62111-2
摘要204)      PDF(pc) (712KB)(181)    收藏
Shades caused by neighboring tall plants in intercropping systems and weak sunlight are constraints in yield optimization.  Shade influences many aspects of plant growth and development, leading to weak stems and susceptibility to lodging.  The plant cell wall is composed of certain proteins that allow the walls to stretch out, a process called cell wall loosening.  Shade affects anatomical, morphological, and physiological traits of plants, thus reducing the physical strength of the stem in crops by changing the loosening of cell walls.  Flexibility of cells facilitates further modifications such as wall loosening.  In addition, shade stress causes increased internode length, and reduced xylem synthesis and photosynthesis.  In shaded plants, lignin deposition in vascular bundles and sclerenchyma cells of stems is decreased.  Lignin is a light sensitive phenolic compound and shading decreases the transcript abundance of several phenolic compound (flavone and lignin) related genes.  Shading significantly influences the metabolic activities of phenylalanine ammonia-lyase (PAL), peroxidase (POD), 4-coumarate: CoA ligase (4CL), and cinnamyl alcohol dehydrogenase (CAD) involved in lignin biosynthesis.  Furthermore, suppression of lignin biosynthesis activities by abiotic stresses causes abnormal phenotypes such as collapsed xylem, bent stems, and growth retardation.  In this review, the underlying mechanisms illustrate that under shading conditions reduced lignin content results in slender, weak, and unstable stems.  The objective of this review is to elaborate lignin biosynthesis and its variability under stressful environmental conditions, especially in shade stress environments.  The effects of shade on stem lignin metabolism are discussed on the morphogenetic, physiological, and proteomic levels.
 
参考文献 | 相关文章 | 多维度评价
18. Rhizosphere soil bacterial community composition in soybean genotypes and feedback to soil P availability
ZHOU Tao, WANG Li, DU Yong-li, LIU Ting, LI Shu-xian, GAO Yang, LIU Wei-guo, YANG Wen-yu
Journal of Integrative Agriculture    2019, 18 (10): 2230-2241.   DOI: 10.1016/S2095-3119(18)62115-X
摘要143)      PDF    收藏
Soil with low phosphorus (P) availability and organic matter contents exists in large area of southwest of China, but some soybean genotypes still show well adaptations to this low yield farmland.  However, to date, the underlying mechanisms of how soybean regulates soil P availability still remains unclear, like microbe-induced changes.  The objective of the present study was to compare the differences of rhizosphere bacterial community composition between E311 and E109 in P-sufficiency (10.2 mg kg–1) and P-insufficiency (5.5 mg kg–1), respectively, which then feedback to soil P availability.  In P-sufficiency, significant differences of the bacterial community composition were observed, with fast-growth bacterial phylum Proteobacteria, genus Dechloromonas, Pseudomonas, Massilia, and Propionibacterium that showed greater relative abundances in E311 compared to E109, while in P-insufficiency were not.  A similar result was obtained  that E311 and E109 were clustered together in P-insufficiency rather than in P-sufficiency by using principal component analysis and hierarchical clustering analysis.  The quadratic relationships between bacterial diversity and soil P availability in rhizosphere were analyzed, confirming that bacterial diversity enhanced the soil P availability.  Moreover, the high abundance of Pseudomonas and Massilia in the rhizosphere of E311 might increased the P availability.  In the present study, the soybean E311 showed capability of shaping rhizosphere bacterial diversity, and subsequently, increasing soil P availability.  This study provided a strategy for rhizosphere management through soybean genotype selection and breeding to increase P use efficiency, or upgrade middle or low yield farmland.
参考文献 | 相关文章 | 多维度评价
19. Shade stress decreases stem strength of soybean through restraining lignin biosynthesis
LIU Wei-guo, Sajad Hussain, LIU Ting, ZOU Jun-lin, REN Meng-lu, ZHOU Tao, LIU Jiang, YANG Feng, YANG Wen-yu
Journal of Integrative Agriculture    2019, 18 (1): 43-53.   DOI: 10.1016/S2095-3119(18)61905-7
摘要286)      PDF    收藏
Lodging is the most important constraint for soybean growth at seedling stage in maize-soybean relay strip intercropping system.  In the field experiments, three soybean cultivars Nandou 032-4 (shade susceptible cultivar; B1), Jiuyuehuang (moderately shade tolerant cultivar; B2), and Nandou 12 (shade tolerant cultivar; B3) were used to evaluate the relationship between stem stress and lignin metabolism in the stem of soybean.  Results showed that the intercropped soybean was in variable light condition throughout the day time and co-growth stage with maize.  The xylem area and cross section ratio played a main role to form the stem stress.  The B3 both in intercropping and monocropping expressed a high stem stress with higher xylem area, lignin content, and activity of enzymes (phenylalanine ammonia-lyase (PAL), 4-coumarate: CoA ligase (4CL), cinnamyl alcohol dehydrogenase (CAD), and peroxidase (POD)) than those of B1 and B2.  Among the soybean cultivars and planting pattern, lignin content was positively correlated with stem stress.  However, a negative correlation was found between lignin content and actual rate of lodging.  In conclusion, the shade tolerant soybean cultivar had larger xylem area, higher lignin content and activities of CAD, 4CL, PAL, and POD than other soybean cultivars in intercropping.  The lodging in maize-soybean intercropping can be minimized by planting shade tolerant and lodging resistant cultivar of soybean.  The lignin content in stem could be a useful indicator for the evaluation of lodging resistance of soybean in intercropping and activities of enzymes were the key factors that influence the lignin biosynthesis.
参考文献 | 相关文章 | 多维度评价
20. Identification and genetic analysis of multiple P chromosomes of Agropyron cristatum in the background of common wheat
CHEN Hong-xin, HAN Hai-ming, LI Qing-feng, ZHANG Jin-peng, LU Yu-qing, YANG Xin-ming, LI Xiuquan, LIU Wei-hua, LI Li-hui
Journal of Integrative Agriculture    2018, 17 (08): 1697-1705.   DOI: 10.1016/S2095-3119(17)61861-6
摘要436)      PDF    收藏
Agropyron cristatum, a wild relative of common wheat (Triticum aestivum L.), provides many desirable genetic resources for wheat improvement, such as tolerance to cold, drought, and disease.  To transfer and utilize these desirable genes, in this study, two wheat-A. cristatum derivatives II-13 and II-23 were identified and analyzed.  We found that the number of root tip cell chromosomes was 44 in both II-13 and II-23, but there were four and six P genome chromosomes in II-13 and II-23, respectively, based on genomic in situ hybridization (GISH).  The chromosome configurations of II-13 and II-23 were both 2n=22II by the meiotic analysis of pollen mother cells (PMCs) at metaphase I, indicating that there were two and three pairs of P chromosomes in II-13 and II-23, respectively.  Notably, wheat chromosome 7D was absent in derivative line II-13 while II-23 lacked chromosomes 4B and 7A based on SSR analysis combining fluorescence in situ hybridization (FISH) analysis with pAs1 and pSc119.2 as probes.  Chromosomes 2P and 7P were detected in both II-13 and II-23.  Another pair of P genome chromosomes in II-23 was determined to be 4P based on expressed-sequences tags-sequence tagged sites (EST-STS) markers specific to A. cristatum and FISH with probes pAcTRT1 and pAcpCR2.  Overall, these results suggest that II-13 was a 7P (7D) substitution line with one pair of additional 2P chromosomes and II-23 was a multiple 4P (4B), 7P (7A) substitution line with one pair of additional 2P chromosomes.  Moreover, we obtained six alien disomic addition lines and five alien disomic substitution lines by backcrossing.  These new materials will allow desirable genes from A. cristatum to be used in common wheat.
 
参考文献 | 相关文章 | 多维度评价
21. Effect of shade stress on lignin biosynthesis in soybean stems
LIU Wei-guo, REN Meng-lu, LIU Ting, DU Yong-li, ZHOU Tao, LIU Xiao-ming, LIU Jiang, Sajad Hussain, YANG Wen-yu
Journal of Integrative Agriculture    2018, 17 (07): 1594-1604.   DOI: 10.1016/S2095-3119(17)61807-0
摘要509)      PDF    收藏
To clarify how shade stress affects lignin biosynthesis in soybean stem, two varieties, Nandou 12 (shade tolerant) and Nan 032-4 (shade susceptible) grew under normal light and shade conditions (the photosynthetically active radiation and the ratio of red:far-red were lower than normal light condition).  Lignin accumulation, transcripts of genes involved in lignin biosynthesis, and intermediates content of lignin biosynthesis were analyzed.  Both soybean varieties suffered shade stress had increased plant heights and internode lengths, and reduced stem diameters and lignin accumulation in stems.  The expression levels of lignin-related genes were significantly influenced by shade stress, with interactions between the light environment and variety.  The gene of 3-hydroxylase (C3H), cinnamoyl-CoA reductase (CCR), caffeoyl-CoA O-methyltransferase (CCoAOMT), and peroxidase (POD) attributed to lignin biosynthesis under shade stress, and the down-regulation of these genes resulted in lower caffeic, sinapic, and ferulic acid levels, which caused a further decrease in lignin biosynthesis.  Under shade stress, the shade tolerant soybean variety (Nandou 12) showed stiffer stems, higher lignin content, and greater gene expression level and higher metabolite contents than shade susceptible one.  So these characteristics could be used for screening the shade-tolerant soybean for intercropping.
 
参考文献 | 相关文章 | 多维度评价
22. Regionalization of wheat powdery mildew oversummering in China based on digital elevation
ZOU Ya-fei, QIAO Hong-bo, CAO Xue-ren, Liu Wei, FAN Jie-ru, SONG Yu-li, WANG Bao-tong, ZHOU Yi-lin
Journal of Integrative Agriculture    2018, 17 (04): 901-910.   DOI: 10.1016/S2095-3119(17)61851-3
摘要590)      PDF    收藏
Blumeria graminis f. sp. tritici, the pathogen that causes wheat powdery mildew, is one of the most important diseases affecting wheat production in China, and the oversummering is the key stage of wheat powdery mildew epidemic.  The more oversummering regionalization of wheat powdery mildew has played an important role in disease prediction, prevention and control.  In this study, we analyzed the correlation between oversummering data of wheat powdery mildew and the meteorological factors over the past years, and determined that temperature was the key meteorological factor influencing oversummering of wheat powdery mildew.  The average temperature at which wheat powdery mildew growth was terminated (26.2°C) was used as the threshold temperature to regionalize the oversummering range of wheat powdery mildew.  This regionalization was done using the GIS ordinary kriging method combined with the Digital Elevation model (DEM) of China.  The results showed that annual probability of oversummering region based on Model 26.2 were consistent with the actual survey of the more summer wheat powdery mildew.  Wheat powdery mildew oversummering regions in China mainly cover mountainous or high-altitude areas, and these regions form a narrow north-south oversummering zone.  Oversummering regions of wheat powdery mildew is mainly concentrated in the high-altitude wheat growing areas, including northern and southern Yunnan, northwestern Guizhou, northern and southern Sichuan, northern and southern Chongqing, eastern and southern Gansu, southeastern Ningxia, northern and southern Shaanxi, central Shanxi, western Hubei, western Henan, northern and western Hebei, western Liaoning, eastern Tibet, eastern Qinghai, western Xinjiang and other regions of China.
参考文献 | 相关文章 | 多维度评价
23. Genetic characteristics of a wheat founder parent and a widely planted cultivar derived from the same cross
CHANG Li-fang, LI Hui-hui, WU Xiao-yang, LU Yu-qing, ZHANG Jin-peng, YANG Xin-ming, LI Xiu-quan, LIU Wei-hua, LI Li-hui
Journal of Integrative Agriculture    2018, 17 (04): 775-785.   DOI: 10.1016/S2095-3119(17)61710-6
摘要771)      PDF    收藏
Founder parents have contributed significantly to the improvement of wheat breeding and production.  In order to investigate the genetic characteristics of founder parents and widely planted cultivars, Mazhamai (M), Biyumai (B) and six sibling lines (BM1–6) derived from the cross M×B were phenotyped for eight yield-related traits over multiple years and locations and genotyped using the the wheat 90K single nucleotide polymorphism (SNP) assay.  BM4 has been used as a founder parent, and BM1 has been widely planted, whereas BM2, 3, 5, and 6 have not been used extensively for breeding or planting in China.  Phenotypic comparisons revealed that BM4 and BM1 displayed a better overall performance than the other sibling lines.  BM1 showed higher thousand-grain weight than BM4, whereas BM4 exhibited lower coefficient of variation for most of the yield-related traits across different years and locations, indicating that BM4 was widely adaptable and more stable in different environments.  SNP analysis revealed that BM4 and BM1 inherited similar proportions of the M genome but are dissimilar to BM2, 3, 5, and 6.  Both BM1 and BM4 have specific alleles that differ from the other BM lines, and most of these alleles are concentrated in specific chromosomal regions that are found to associate with favorable QTLs, these SNPs and their surrounding regions may carry the genetic determinants important for the superior performance of the two lines.  But BM4 has more genetic diversity than BM1 with more specific alleles and pleiotropic regions, indicating that the genome of BM4 may be more complex than the other sibling lines and has more favorable gene resources.  Our results provide valuable information that can be used to select elite parents for wheat and self-pollinating crop breeding.
参考文献 | 相关文章 | 多维度评价
24. Maize-soybean strip intercropping: Achieved a balance between high productivity and sustainability
DU Jun-bo, HAN Tian-fu, GAI Jun-yi, YONG Tai-wen, SUN Xin, WANG Xiao-chun, YANG Feng, LIU Jiang, SHU Kai, LIU Wei-guo, YANG Wen-yu
Journal of Integrative Agriculture    2018, 17 (04): 747-754.   DOI: 10.1016/S2095-3119(17)61789-1
摘要1054)      PDF    收藏
Intercropping is one of the most vital practice to improve land utilization rate in China that has limited arable land resource. However, the traditional intercropping systems have many disadvantages including illogical field lay-out of crops, low economic value, and labor deficiency, which cannot balance the crop production and agricultural sustainability. In view of this, we developed a novel soybean strip intercropping model using maize as the partner, the regular maize-soybean strip intercropping mainly popularized in northern China and maize-soybean relay-strip intercropping principally extended in southwestern China. Compared to the traditional maize-soybean intercropping systems, the main innovation of field lay-out style in our present intercropping systems is that the distance of two adjacent maize rows are shrunk as a narrow strip, and a strip called wide strip between two adjacent narrow strips is expanded reserving for the growth of two or three rows of soybean plants.  The distance between outer rows of maize and soybean strips are expanded enough for light use efficiency improvement and tractors working in the soybean strips.  Importantly, optimal cultivar screening and increase of plant density achieved a high yield of both the two crops in the intercropping systems and increased land equivalent ratio as high as 2.2.  Annually alternative rotation of the adjacent maize- and soybean-strips increased the grain yield of next seasonal maize, improved the absorption of nitrogen, phosphorus, and potasium of maize, while prevented the continuous cropping obstacles.  Extra soybean production was obtained without affecting maize yield in our strip intercropping systems, which balanced the high crop production and agricultural sustainability.
参考文献 | 相关文章 | 多维度评价
25. Optimized nitrogen application methods to improve nitrogen use efficiency and nodule nitrogen fixation in a maize-soybean relay intercropping system
YONG Tai-wen, CHEN Ping, DONG Qian, DU Qing, YANG Feng, WANG Xiao-chun, LIU Wei-guo, YANG Wen-yu
Journal of Integrative Agriculture    2018, 17 (03): 664-676.   DOI: 10.1016/S2095-3119(17)61836-7
摘要779)      PDF    收藏
In China, the abuse of chemical nitrogen (N) fertilizer results in decreasing N use efficiency (NUE), wasting resources and causing serious environmental problems.  Cereal-legume intercropping is widely used to enhance crop yield and improve resource use efficiency, especially in Southwest China.  To optimize N utilization and increase grain yield, we conducted a two-year field experiment with single-factor randomized block designs of a maize-soybean intercropping system (IMS).  Three N rates, NN (no nitrogen application), LN (lower N application: 270 kg N ha–1), and CN (conventional N application: 330 kg N ha–1), and three topdressing distances of LN (LND), e.g., 15 cm (LND1), 30 cm (LND2) and 45 cm (LND3) from maize rows were evaluated.  At the beginning seed stage (R5), the leghemoglobin content and nitrogenase activity of LND3 were 1.86 mg plant–1 and 0.14 mL h–1 plant–1, and those of LND1 and LND2 were increased by 31.4 and 24.5%, 6.4 and 32.9% compared with LND3, respectively.  The ureide content and N accumulation of soybean organs in LND1 and LND2 were higher than those of LND3.  The N uptake, NUE and N agronomy efficiency (NAE) of IMS under CN were 308.3 kg ha–1, 28.5%, and 5.7 kg grain kg–1 N, respectively; however, those of LN were significantly increased by 12.4, 72.5, and 51.6% compared with CN, respectively.  The total yield in LND1 and LND2 was increased by 12.3 and 8.3% compared with CN, respectively.  Those results suggested that LN with distances of 15–30 cm from the topdressing strip to the maize row was optimal in maize-soybean intercropping.  Lower N input with an optimized fertilization location for IMS increased N fixation and N use efficiency without decreasing grain yield.
参考文献 | 相关文章 | 多维度评价
26. Novel and favorable genomic regions for spike related traits in a wheat germplasm Pubing 3504 with high grain number per spike under varying environments
CHEN Dan, WU Xiao-yang, WU Kuo, ZHANG Jin-peng, LIU Wei-hua, YANG Xin-ming, LI Xiu-quan, LU Yu-qing, LI Li-hui
Journal of Integrative Agriculture    2017, 16 (11): 2386-2401.   DOI: 10.1016/S2095-3119(17)61711-8
摘要607)      PDF    收藏
   Grain number per spike (GNPS) is a major factor in wheat yield breeding.  A new wheat germplasm Pubing 3504 shows superior features in spike traits.  To elucidate the genetic basis of spike and yield related traits in Pubing 3504, 282 F2:3 families were generated from the cross Pubing 3504×Jing 4839, and seven spike and yield related traits, including GNPS, spike length (SL), kernel number per spikelet (KPS), spikelet number per spike (SNS), thousand-grain weight (TGW), spike number per plant (SNP), and plant height (HT) were investigated.  Correlation analysis indicated significant positive correlations between GNPS and spike-related traits, including KPS, SNS, and SL, especially KPS.  A genetic map was constructed using 190 polymorphic simple sequence repeat (SSR), expressed sequence tag (EST)-SSR, and sequence-tagged-site (STS) markers.  For the seven traits measured, a total of 37 quantitative trait loci (QTLs) in a single-environment analysis and 25 QTLs in a joint-environment analysis were detected.  Additive effects of 70.3% (in a single environment) and 57.6% (in a joint environment) of the QTLs were positively contributed by Pubing 3504 alleles.  Five important genomic regions on chromosomes 1A, 4A, 4B, 2D, and 4D could be stably detected in different environments.  Among these regions, the marker interval Xmag834–Xbarc83 on the short arm of chromosome 1A was a novel important genomic region that included QTLs controlling GNPS, KPS, SNS, TGW, and SNP with stable environmental repeatability.  This genomic region can improve the spike trait and may play a key role in improving wheat yield in the future.  We deduced that this genomic region was vital to the high GNPS of Pubing 3504.
参考文献 | 相关文章 | 多维度评价
27. Shade adaptive response and yield analysis of different soybean genotypes in relay intercropping systems
WU Yu-shan, YANG Feng, GONG Wan-zhuo, Shoaib Ahmed, FAN Yuan-fang, WU Xiao-ling, YONG Tai-wen, LIU Wei-guo, SHU Kai, LIU Jiang, DU Jun-bo, YANG Wen-yu
Journal of Integrative Agriculture    2017, 16 (06): 1331-1340.   DOI: 10.1016/S2095-3119(16)61525-3
摘要917)      PDF    收藏
Soybean is one of the major oil seed crops, which is usually intercropped with other crops to increase soybean production area and yield.  However, soybean is highly sensitive to shading.  It is unclear if soybean morphology responds to shading (i.e., shade tolerance or avoidance) and which features may be suitable as screening materials in relay strip intercropping.  Therefore, in this study, various agronomic characteristics of different soybean genotypes were analyzed under relay intercropping conditions.  The soybean materials used in this study exhibited genetic diversity, and the coefficient of variations of the agronomic parameters ranged from 13.84 to 72.08% during the shade period and from 6.44 to 52.49% during the maturity period.  The ratios of shading to full irradiance in stem mass fraction (SMF) were almost greater than 1, whereas opposite results were found in the leaves.  Compared with full irradiance, the average stem length (SL), leaf area ratio (LAR) and specific leaf area (SLA) for the two years (2013 and 2014) increased by 0.78, 0.47 and 0.65 under shady conditions, respectively.  However, the stem diameter (SD), total biomass (TB), leaf area (LA), number of nodes (NN) on the main stem, and number of branches (BN) all decreased.  During the shady period, the SL and SMF exhibited a significant negative correlation with yield, and the SD exhibited a significant positive correlation with yield.  The correlation between the soybean yield and agronomic parameters during the mature period, except for SL, the first pod height (FPH), 100-seed weight (100-SW), and reproductive growth period (RGP), were significant (P<0.01), especially for seed weight per branch (SWB), pods per plant (PP), BN, and vegetative growth period (VGP).  These results provide an insight into screening the shade tolerance of soybean varieties and can be useful in targeted breeding programs of relay intercropped soybeans.  
参考文献 | 相关文章 | 多维度评价
28. Alleles contributing to acetyl coenzyme A carboxylase (ACCase) resistance in keng stiffgrass (Pseudosclerochloa kengiana) populations from China
YUAN Guo-hui, GUO Wen-lei, DU Long, LIU Wei-tang, LI Qi, LI Ling-xu, WANG Jin-xin
Journal of Integrative Agriculture    2017, 16 (01): 125-134.   DOI: 10.1016/S2095-3119(16)61452-1
摘要666)      PDF    收藏
Keng stiffgrass is a grass weed that affects wheat-rice cropping systems in China.  The extensive reliance on acetyl coenzyme A carboxylase (ACCase)-inhibiting herbicides has resulted in keng stiffgrass developing resistance to these herbicides.  The objective of this research was to evaluate the resistance level of the putative resistant keng stiffgrass populations to ACCase-inhibiting herbicides and to identify their molecular resistance mechanism.  Whole-plant dose-response experiments demonstrated that SD-4 (R), SD-11 (R), and JS-25 (R) populations were highly resistant to fenoxaprop, clodinafop, and fluazifop, moderately resistant to diclofop, had low resistance to sethoxydim and pinoxaden, but were sensitive to clethodim.  Partial chloroplastic ACCase sequences showed that there were two copies of ACCase gene in keng stiffgrass, and all homoeologous genes were expressed.  The results of sequence analyses of the ACCase CT domain revealed an isoleucine-to-asparagine substitution at position 2041 in SD-4 (R) and SD-11 (R) populations, and a tryptophan-to-cysteine substitution at position 2027 in the JS-25 (R) population.  To our knowledge, this is the first report of Ile-2041-Asn and Trp-2027-Cys mutations in ACCase-resistant keng stiffgrass.  In addition, three robust (derived) cleaved amplified polymorphic sequence ((d)CAPS) markers have been developed to rapidly identify these mutations in the ACCase gene of keng stiffgrass.
参考文献 | 相关文章 | 多维度评价
29. Gene and protein expression profiling analysis of young spike development in large spike wheat germplasms
CHEN Dan, ZHANG Jin-peng, LIU Wei-hua, WU Xiao-yang, YANG Xin-ming, LI Xiu-quan, LU Yu-qing, LI Li-hui
Journal of Integrative Agriculture    2016, 15 (4): 744-754.   DOI: 10.1016/S2095-3119(15)61179-0
摘要1705)      PDF    收藏
The wheat grain number per spike (GNPS) is a major yield-limiting factor in wheat-breeding programs. Germplasms with a high GNPS are therefore valuable for increasing wheat yield potential. To investigate the molecular characteristics of young spike development in large-spike wheat germplasms with high GNPS, we performed gene and protein expression profiling analysis with three high-GNPS wheat lines (Pubing 3228, Pubing 3504 and 4844-12) and one low-GNPS control variety (Fukuho). The phenotypic data for the spikes in two growth seasons showed that the GNPS of the three large-spike wheat lines were significantly higher than that of the Fukuho control line. The Affymetrix wheat chip and isobaric tags for relative and absolute quantitation-tandam mass spectrometry (iTRAQ-MS/MS) technology were employed for gene and protein expression profiling analyses of young spike development, respectively, at the floret primordia differentiation stage. A total of 598 differentially expressed transcripts (270 up-regulated and 328 down-regulated) and 280 proteins (122 up- regulated and 158 down-regulated) were identified in the three high-GNPS lines compared with the control line. We found that the expression of some floral development-related genes, including Wknox1b, the AP2 domain protein kinase and the transcription factor HUA2, were up-regulated in the high-GNPS lines. The expression of the SHEPHERD (SHD) gene was up-regulated at both the transcript and protein levels. Overall, these results suggest that multiple regulatory pathways, including the CLAVATA pathway and the meristem-maintaining KNOX protein pathway, take part in the development of the high-GNPS phenotype in our wheat germplasms.
参考文献 | 相关文章 | 多维度评价
30. Effects of intercropping vines with tobacco and root extracts of tobacco on grape phylloxera, Daktulosphaira vitifoliae Fitch
WANG Zhong-yue , SU Jun-ping, LIU Wei-wei, GUO Yu-yuan
Journal of Integrative Agriculture    2015, 14 (7): 1367-1375.   DOI: 10.1016/S2095-3119(14)60864-9
摘要2241)      PDF    收藏
The effects of grape-tobacco intercropping patterns on populations of grape phylloxera, Daktulosphaira vitifoliae Fitch, as well as on the growth and development of the infested vines were evaluated in the field and the impact of an aqueous tobacco root extract on grape phylloxera was evaluated using a laboratory bioassay. The aqueous tobacco root extract exhibited biological activity against this pest. The egg mortality, nymph mortality, development period, life span and female fecundity were significantly affected. In the field trial, grape phylloxera populations were clearly lower as compared to the monoculture pattern. However, the rates of newly developed roots and newly infested grape roots were significantly higher and lower, in intercropping patterns than in the vine monoculture, respectively. The grape phylloxera population number on the grape roots decreased each year, and the vine trees gradually renewed upon continuous intercropping with tobacco over three years. These results confirmed that intercropping grapes with tobacco can effectively control grape phylloxera in an infested vineyard. The results also indicated that additional crops could be intercropped with grapes and are effective against grape phylloxera, which should be explored as an integrated approach for controlling the pest.
参考文献 | 相关文章 | 多维度评价