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. 组蛋白H3K27me3甲基化调节分泌蛋白表达在快速进化区域可以通过抑制转座子转录
XIE Jia-hui, TANG Wei, LU Guo-dong, HONG Yong-he, ZHONG Zhen-hui, WANG Zong-hua, ZHENG Hua-kun
Journal of Integrative Agriculture    2023, 22 (10): 3059-3068.   DOI: 10.1016/j.jia.2023.01.011
摘要228)      PDF    收藏
效应因子表达的精准调控对病原菌从营养阶段到定殖于植物体内的转变至关重要。但是,我们对这些基因的动态调节机制的了解仍有限。本研究通过比较转录组学和染色质免疫沉淀测序方式对稻瘟病菌中甲基化转移酶PoKMT6进行功能分析,发现PoKmt6介导的H3K27me3主要富集在快速进化区,并且这种修饰导致部分分泌蛋白(SP)编码基因和转座子(TE)在菌丝体阶段被沉默。有趣的是,我们发现部分SP基因本身不受H3K27me3修饰,但其附近TEH3K27me3修饰可以间接沉默这些基因的表达。综上所述,我们的结果表明,在快速进化区,PoKmt6介导的H3K27me3通过抑制附近TE的表达来调节部分SP基因表达。
参考文献 | 相关文章 | 多维度评价
2. JIA-2021-1477 轮枝镰刀菌过氧化物酶体基质受体Pex5影响致病性及FB1合成
YU Wen-ying, LIN Mei, YAN Hui-juan, WANG Jia-jia, ZHANG Sheng-min, LU Guo-dong, WANG Zong-hua, Won-Bo SHIM
Journal of Integrative Agriculture    2022, 21 (10): 2957-2972.   DOI: 10.1016/j.jia.2022.07.044
摘要235)      PDF    收藏

过氧化物酶体内基质主要包括氧化酶、过氧化氢酶和过氧化物酶等,它们调节细胞氧化稳态和功能,绝大部分的基质含过氧化物酶体靶向信号(PTS)并由PTS受体运输入内。本文研究发现过氧化物酶体靶向信号类型1(PTS1) 受体Pex5的缺失影响了病原真菌轮枝镰刀菌多种生物学功能,结果将有助于阐明 Pex5致病及产毒的分子机制,并为控制病害和减少伏马菌素 B1(FB1)的毒害提供理论依据。同源重组的方法构建FvPEX5敲除突变体(ΔFvpex5),继而构建敲除突变体的互补菌株。通过比较野生型,敲除突变体和互补菌株三者的表型,我们探究并验证FvPex5在轮枝镰刀菌中的生物学功能;进一步通过RNA-Seq 分析ΔFvpex5中表达差异的PTS蛋白,并结合GO和KEEG注释进而解析FvPex5影响生物学功能的原因。研究发现轮枝镰刀 PTS1受体 FvPex5 参与 PTS1 的定位、碳源和脂质的利用、消除 ROS、细胞壁应激反应、分生孢子的形成FB1产生以及致病性。在ΔFvpex5 突变体,RNA-Seq 分析发现差异表达的PTS1、PTS2、 PTS 相关途径中的过氧化物酶体相关基因(PEX) FB1 毒素相关基因,并进一步通过RT-PCR 证实这些基因的差异表达。此外,结合GO和KEEG注释,发现ΔFvpex5突变体中差异表达的PTS1、PTS2基因在碳代谢、氮代谢、脂质代谢和氧化平衡等多种生化途径中富集。FvPex5 参与了 PTS 相关基因的调控,从而影响了轮枝镰刀菌的氧化平衡、FB1产量和致病性。本研究首次发现了FvPex5对伏马毒素FB1合成起调节作用,并首次对轮枝镰刀菌中的过氧化物酶体靶向信号(PTS)蛋白进行了预测及功能分析。

参考文献 | 相关文章 | 多维度评价
3.  
ZHANG Li-mei, CHEN Shu-ting, QI Min, CAO Xue-qi, LIANG Nan, LI Qian, TANG Wei, LU Guo-dong, ZHOU Jie, YU Wen-ying, WANG Zong-hua, ZHENG Hua-kun
Journal of Integrative Agriculture    2021, 20 (11): 2944-2956.   DOI: 10.1016/S2095-3119(20)63493-1
摘要103)      PDF    收藏
 

细胞自噬通过维持细胞内物质与能量的动态平衡,进而调控很多发育过程。已知延伸复合物蛋白Elp3具有多种功能并参与调控自噬,但其在稻瘟病菌中的功能仍不清楚。为此,构建了稻瘟病菌Elp3编码基因PoELP3(MGG_05481)的敲除突变体,对其功能进行研究。表型分析结果显示,PoELP3基因的敲除导致稻瘟病菌菌丝生长受抑制,产孢量下降,对细胞壁胁迫剂和盐胁迫剂的敏感性增强,附着胞膨压和致病性显著下降。这些结果表明稻瘟病菌PoElp3在生长发育、胁迫响应和致病过程中均具有重要作用。亚细胞定位结果表明GFP-PoElp3融合蛋白定位于细胞核和细胞质中。为检测稻瘟病菌Elp3在细胞自噬中的作用,将自噬标记GFP-PoAtg8分别导入野生型和突变体中,并通过计算总蛋白中游离GFP占GFP-PoAtg8和游离GFP总量的比例,评估野生型和突变体中自噬的水平。结果表明,无论是在营养充分还是营养不足的条件下,△Poelp3突变体均呈现较高的自噬水平。这可能是导致菌丝生长缓慢的原因。此外,△Poelp3突变体营养菌丝和侵染菌丝的生长均对雷帕霉素更加敏感,但是PoELP3基因的缺失并不影响雷帕霉素对TOR-信号途径下游基因的转录抑制,暗示其并不参与TOR-信号的传导。综上所述,稻瘟病菌Elp3可以通过调控自噬影响无性发育和致病性。但是PoElp3调控自噬的机制仍有待进一步研究。


参考文献 | 相关文章 | 多维度评价
4. Evolutionary analysis of plant jacalin-related lectins (JRLs) family and expression of rice JRLs in response to Magnaporthe oryzae
HAN Yi-juan, ZHONG Zhen-hui, SONG Lin-lin, Olsson Stefan, WANG Zong-hua, LU Guo-dong
Journal of Integrative Agriculture    2018, 17 (06): 1252-1267.   DOI: 10.1016/S2095-3119(17)61809-4
摘要482)      PDF    收藏
Jacalin-related lectins (JRLs) are widely distributed carbohydrate-binding proteins in the plant kingdom, which play key roles in development and pathogen defense.  In this study, we profiled evolutionary trajectory of JRLs family in 30 plant species and identified domain diversification and recombination leading to different responsive patterns of JRLs in rice during defense against rice blast.  All of 30 plant species analyzed in our study have two types of JRLs by containing either a single jacalin or repeated jacalin domains, while chimeric jacalins exist in more than half of the species, especially in the Poaceae family.  Moreover, Poaceae species have evolved two types of unique chimeric JRLs by fusing the jacalin domain(s) with dirigent or NB_ARC domain, some of which positively regulate plant immunity.  Seven Poaceae-specific JRLs are found in the rice genome.  We further found expression of rice JRLs, including four Poaceae-specific JRLs, are induced by Magnaporthe oryzae infections at either early or late infection stages.  Overall, the results present the evolutionary trajectory of JRLs in plant and highlight essential roles of Poaceae specific JRLs against pathogen attacks in rice.
参考文献 | 相关文章 | 多维度评价
5. Comparative analysis of the genome of the field isolate V86010 of the rice blast fungus Magnaporthe oryzae from Philippines
ZHU Kun-peng, BAO Jian-dong, ZHANG Lian-hu, YANG Xue, LI Yuan, Zhu Ming-hui, LIN Qing-yun, ZHAO Ao, ZHAO Zhen, ZHOU Bo, LU Guo-dong
Journal of Integrative Agriculture    2017, 16 (10): 2222-2230.   DOI: 10.1016/S2095-3119(16)61607-6
摘要693)      PDF    收藏
Genome dynamics of pathogenic organisms are driven by plant host and pathogenic organism co-evolution, in which pathogen genomes are used to overcome stresses imposed by hosts with various genetic backgrounds through generation of a range of field isolates.  This model also applies to the rice host and its fungal pathogen Magnaporthe oryzae.  To better understand genetic variation of M. oryzae in nature, the field isolate V86010 from the Philippines was sequenced and analyzed.  Genome annotation found that the assembled V86010 genome was composed of 1 931 scaffolds with a combined length of 38.9 Mb.  The average GC ratio is 51.3% and repetitive elements constitute 5.1% of the genome.  A total of 11 857 genes including 616 effector protein genes were predicted using a combined analysis pipeline.  All predicted genes and effector protein genes of isolate V86010 distribute on the eight chromosomes when aligned with the assembled genome of isolate 70-15.  Effector protein genes are located disproportionately at several chromosomal ends.  The Pot2 elements are abundant in V86010.  Seven V86010-specific effector proteins were found to suppress programmed cell death induced by BAX in tobacco leaves using an Agrobacterium-mediated transient assay.  Our results may provide useful information for further study of the molecular and genomic dynamics in the evolution of M. oryzae and rice host interactions, and for characterizing novel effectors and AVR genes in the rice blast pathogen.  
参考文献 | 相关文章 | 多维度评价
6. Magnaporthe Rab5 homologs show distinct functions in nerve growth factor (NGF)-mediated neurite outgrowth and cell differentiation
QI Yao-yao, LIANG Zhi-min, ZHOU Jie, WANG Zong-hua, LU Guo-dong, LI Guang-pu
Journal of Integrative Agriculture    2015, 14 (5): 823-829.   DOI: 10.1016/S2095-3119(14)60972-2
摘要1969)      PDF    收藏
Nerve growth factor (NGF) binds to TrkA and forms a NGF/TrkA complex at the cell surface, which is then internalized into signaling endosomes and promotes neuronal survival and neurite outgrowth. The small GTPase Rab5 is reported to localize on the plasma membrane and early endosomes, regulating endosome fusion. It was reported that endogenous Rab5 function may need to be suppressed during NGF-induced neurite outgrowth and cell differentiation. Two Rab5 homologs (MoRab5A: MGG_06241 and MoRab5B:MGG_01185) were characterized from the rice blast fungus Magnaporthe oryzae, and MoRab5B was identified as the Rab5 ortholog promoting early endosomal fusion, while MoRab5A specialized to perform a non-redundant function in endosomal sorting. In this study, we examined whether MoRab5A and MoRab5B play different roles in NGF-induced neurite outgrowth and cell differentiation in PC12 cells (a rat pheochromocytoma cell line). Our data showed that MoRab5B is a negative regulator of NGF signaling and neurite outgrowth in PC12 cells, similar to human Rab5 (hRab5). MoRab5B:WT inhibits NGF signaling-dependent neurite outgrowth while the dominant-negative MoRab5B mutant (MoRab5B:DN) enhances NGF signaling and neurite outgrowth. In contrast, MoRab5A:WT and MoRab5A:DN both significantly promote NGF-induced neurite outgrowth, indicating that MoRab5B is more similar to hRab5 than MoRab5A in the regulation of NGF signal transduction.
参考文献 | 相关文章 | 多维度评价