中国农业科学 ›› 2021, Vol. 54 ›› Issue (17): 3592-3608.doi: 10.3864/j.issn.0578-1752.2021.17.004
收稿日期:
2020-09-03
接受日期:
2021-01-05
出版日期:
2021-09-01
发布日期:
2021-09-09
通讯作者:
王群
作者简介:
闫振华,E-mail: 基金资助:
YAN ZhenHua(),LIU DongYao,JIA XuCun,YANG Qin,CHEN YiBo,DONG PengFei,WANG Qun()
Received:
2020-09-03
Accepted:
2021-01-05
Online:
2021-09-01
Published:
2021-09-09
Contact:
Qun WANG
摘要:
【目的】全球季节性高温、干旱已经成为影响作物生长发育和产量形成的主要限制性因素,本研究通过人工模拟阶段高温干旱气候特征,旨在探究夏玉米花期高温、干旱以及高温干旱复合胁迫对其雄穗发育、生理特征及产量形成的影响。【方法】连续2年利用人工智能温室,采用盆栽试验,以郑单958(ZD958)和华农138(HN138)为试验材料,设置对照(CK)、高温胁迫(T)、干旱胁迫(D)和高温干旱复合胁迫(TD)4个处理,研究了夏玉米雄穗形态、花药、花粉结构、花粉活力及雄穗抗氧化指标和产量对花期高温、干旱的响应特征。【结果】2年结果表明,高温、干旱及复合胁迫使玉米雄穗分枝数、主轴小花数和分枝小花密度显著减少,T处理3个参数分别平均比CK减少17.31%、15.70%、13.56%,D和TD处理分别比CK减少33.85%、24.87%、27.08%和45.59%、32.02%、26.00%,干旱及复合胁迫使玉米雄穗主轴比CK平均显著缩短23.64%和27.51%。花期高温、干旱胁迫均导致花药皱缩变形,绒毡层细胞结构松散,花粉粒表面凸起,复合胁迫加剧了花药皱缩变形,绒毡层细胞裂解,药隔维管束变细减少,花粉粒网纹状凸起更为明显,萌发孔内陷。高温、干旱及复合胁迫显著降低雄穗日散粉量,T、D和TD处理日散粉量分别比CK平均减少22.18%、54.75%和67.28%,且使最大散粉量日期提前;T、D和TD处理高活力花粉所占比例显著低于CK,且两两间差异达显著水平。T处理雄穗SOD、POD酶活性升高,较CK平均提高21.91%、32.50%,D和TD处理较CK平均增加24.95%(SOD)、53.37%(POD)和17.12%(SOD)、67.24%(POD),峰值均与CK有极显著差异;T、D和TD处理下雄穗MDA含量较CK平均增加44.18%、64.24%和79.12%,$\mathop{{O}}_{2}^{{\mathop{}_{\ •}^{-}}}$含量较CK平均增加22.55%、51.65%和72.29%,处理间峰值差异达显著水平。高温、干旱及复合胁迫导致玉米产量和行粒数大幅度降低,T、D和TD产量比CK平均降低18.05%、34.58%、46.24%,行粒数比CK平均减少24.58%、41.80%和52.99%。胁迫处理下,2个品种以HN138雄穗分枝数、主轴小花数和分枝小花密度下降幅度大于ZD958,且HN138的高活力花粉占比和散粉量比ZD958分别减少27.00%和17.28%;HN138花药和花粉结构畸变程度超过ZD958,其抗氧化酶活性升高幅度小于ZD958,但MDA和$\mathop{{O}}_{2}^{{\mathop{}_{\ •}^{-}}}$含量比ZD958高13.07%和20.29%,2个品种以HN138对高温、干旱及复合胁迫响应更为敏感。【结论】玉米花期高温、干旱及复合胁迫显著抑制雄穗生长发育,导致花药和花粉形态结构畸变,抗氧化酶活性降低,散粉量显著减少,导致穗粒数减少,最终导致产量下降;且高温干旱复合胁迫对玉米雄穗的影响大于干旱胁迫大于高温胁迫,不同类型品种对高温、干旱的响应程度不同。
闫振华,刘东尧,贾绪存,杨琴,陈艺博,董朋飞,王群. 花期高温干旱对玉米雄穗发育、生理特性和产量影响[J]. 中国农业科学, 2021, 54(17): 3592-3608.
YAN ZhenHua,LIU DongYao,JIA XuCun,YANG Qin,CHEN YiBo,DONG PengFei,WANG Qun. Maize Tassel Development, Physiological Traits and Yield Under Heat and Drought Stress During Flowering Stage[J]. Scientia Agricultura Sinica, 2021, 54(17): 3592-3608.
表1
不同胁迫处理对玉米雄穗农艺性状的影响"
年份 Year | 品种 Cultivar | 处理 Treatment | 主轴长 Tassel central branch length (cm) | 主轴小花数 Tassel central branch spikelet number | 分枝数 Tassel branch number | 分枝小花密度 Tassel branch spikelet density (count/cm) |
---|---|---|---|---|---|---|
2018 | ZD958 | CK | 38.40±1.06a | 268.44±21.46a | 14.84±2.04a | 3.14±0.59a |
T | 38.38±2.70a | 256.42±20.07ab | 12.21±1.60b | 3.02±0.45b | ||
D | 30.52±1.81b | 227.24±12.65bc | 10.2±1.60bc | 2.73±0.38c | ||
TD | 28.78±2.75b | 197.47±25.55c | 9.43±1.62c | 2.62±0.23c | ||
HN138 | CK | 42.78±3.15a | 193.69±10.09a | 4.00±1.26a | 2.44±0.17a | |
T | 33.92±2.07b | 153.88±12.46ab | 3.44±0.80ab | 2.29±0.32b | ||
D | 31.84±1.79c | 138.15±9.23bc | 2.63±0.80ab | 1.77±0.28c | ||
TD | 29.82±1.60c | 130.45±17.58c | 2.00±0.89b | 2.26±0.31b | ||
2019 | ZD958 | CK | 38.25±4.64a | 309.60±14.89a | 17.80±1.33a | 4.02±0.14a |
T | 36.51±2.27a | 268.40±10.03b | 14.80±1.47b | 3.04±0.22b | ||
D | 30.35±2.26b | 245.60±35.67b | 12.00±1.10c | 2.45±0.15c | ||
TD | 29.79±1.32b | 198.80±9.66c | 9.60±1.36d | 2.35±0.28c | ||
HN138 | CK | 45.96±1.28a | 220.40±8.59a | 4.80±1.72a | 3.27±0.48a | |
T | 35.79±0.57b | 166.60±3.44b | 3.80±0.98a | 2.62±0.18a | ||
D | 33.18±0.39b | 143.80±4.35c | 3.00±1.10b | 2.33±0.15ab | ||
TD | 30.99±1.25c | 147.20±9.27d | 2.40±1.02b | 2.01±0.15b | ||
变异来源 Source of variation | 年份 Year | NS | NS | NS | NS | |
品种 Cultivar | ** | ** | ** | ** | ||
处理 treatment | ** | ** | ** | ** | ||
年份×品种 Year×Cultivars | NS | NS | NS | NS | ||
年份×处理 Year×Treatment | NS | NS | NS | NS | ||
品种×处理 Cultivars×Treatment | ** | ** | * | NS | ||
年份×品种×处理 Year×Cultivars×Treatment | NS | NS | NS | NS |
表2
不同胁迫处理对产量及其构成要素的影响"
年份 Year | 品种 Cultivars | 处理 Treatment | 穗长 Ear length (cm) | 穗粗 Ear diameter (mm) | 秃尖 Bald tip (mm) | 穗行数 Ear rows | 行粒数 Kernels per row | 千粒重 1000 grain weight (g) | 产量 Yield (kg·hm-2) |
---|---|---|---|---|---|---|---|---|---|
2018 | ZD958 | CK | 15.91±1.12a | 52.12±2.11a | 2.39±2.24c | 17.60±1.20a | 33.40±1.43a | 322.09±5.77a | 12620.21±279.16a |
T | 14.95±0.65a | 49.66±2.01b | 4.59±0.85c | 17.20±2.04a | 26.70±2.69b | 322.08±5.93a | 9762.19±230.86b | ||
D | 11.57±1.30b | 45.34±3.05c | 10.01±1.17b | 15.80±2.27a | 17.50±2.91c | 295.49±11.84b | 7700.68±151.23c | ||
TD | 10.39±0.83c | 42.58±1.75d | 22.64±6.87a | 15.80±1.66a | 15.40±2.24c | 305.45±13.19b | 5809.84±153.80d | ||
HN138 | CK | 17.48±1.03a | 49.18±1.65a | 6.58±3.48b | 15.40±1.29a | 32.40±2.54a | 261.39±5.15a | 9387.42±170.16a | |
T | 15.22±0.51b | 49.39±1.04a | 33.99±4.19a | 15.00±1.00a | 24.90±1.97b | 252.25±7.11b | 7677.14±186.88b | ||
D | 12.92±1.18c | 41.68±3.55b | 32.76±5.23a | 15.20±0.98a | 19.50±1.57c | 240.06±3.50c | 5070.93±139.57c | ||
TD | 11.11±0.91d | 40.58±2.52b | 30.65±9.76a | 15.00±1.34a | 15.90±1.92d | 239.64±7.38c | 4145.12±179.17d | ||
2019 | ZD958 | CK | 15.62±0.32a | 51.41±2.61a | 2.19±1.85a | 16.60±1.56a | 36.00±1.55a | 350.98±12.79a | 12984.97±148.62a |
T | 14.36±0.25a | 49.04±1.36b | 5.53±0.46a | 15.80±1.40a | 23.90±1.97b | 329.65±16.62ab | 9870.79±182.17b | ||
D | 11.98±0.97b | 46.24±1.42c | 9.03±0.68b | 14.60±0.92a | 19.20±2.40c | 334.93±18.91a | 9371.21±128.42c | ||
TD | 10.66±0.52c | 45.69±1.76c | 17.49±1.96c | 14.00±1.26a | 15.00±1.79d | 305.14±19.33b | 8419.67±189.74d | ||
HN138 | CK | 19.57±1.45a | 49.71±0.89a | 7.43±2.46c | 16.00±1.26a | 29.30±2.72a | 265.86±11.30a | 10153.57±218.83a | |
T | 18.19±1.72a | 49.08±0.72a | 53.53±16.96b | 15.40±1.28a | 23.00±2.45b | 259.37±6.71b | 9368.37±123.10b | ||
D | 14.60±1.27b | 46.19±0.75b | 53.24±14.18a | 15.20±1.33a | 19.60±2.46c | 250.63±5.53b | 7469.07±188.68c | ||
TD | 11.47±1.81c | 42.53±1.90c | 37.92±7.56a | 15.00±1.84a | 15.00±1.41d | 248.98±6.52c | 6005.79±188.81d | ||
变异来源 Source of variation | 年份 Year | NS | NS | NS | NS | NS | NS | NS | |
品种 Cultivars | ** | ** | ** | ** | * | ** | ** | ||
处理 Treatment | ** | ** | ** | ** | ** | ** | ** | ||
年份×品种 Year×Cultivars | NS | NS | * | * | * | NS | NS | ||
年份×处理 Year×Treatment | NS | NS | NS | NS | * | NS | NS | ||
品种×处理 Cultivars×Treatment | ** | ** | ** | NS | * | ** | NS | ||
年份×品种×处理 Year×Cultivars×Treatment | NS | NS | NS | NS | * | NS | NS |
表3
不同胁迫处理下产量、产量构成要素与雄穗相关指标的相关分析"
年份 Year | 雄穗相关指标 Tassel-related trait | ZD958 | HN138 | ||||
---|---|---|---|---|---|---|---|
产量 Yield | 穗粒数 Grains per ear | 千粒重 1000 grain weight | 产量 Yield | 穗粒数 Grains per ear | 千粒重 1000 grain weight | ||
2018 | 主轴长 Tassel central branch length | 0.7769** | 0.8150** | 0.3344 | 0.7330** | 0.6034* | 0.3704 |
主轴小花数 Central branch spikelet number | 0.7283** | 0.7111** | 0.2555 | 0.5745* | 0.5532* | 0.3407 | |
分枝数 Tassel branch number | 0.5045 | 0.2377 | 0.4747 | 0.5363* | 0.5928* | 0.3608 | |
分枝小花密度Tassel branch spikelet density | 0.4037 | 0.3208 | 0.2157 | 0.0987 | 0.0746 | 0.3723 | |
花粉量 Fresh pollen weight | 0.9239** | 0.8321** | 0.5518* | 0.8918** | 0.8639** | 0.6431** | |
花粉活力 Pollen activity | 0.8568** | 0.7896 | 0.5887* | 0.6146* | 0.7228** | 0.3597 | |
2019 | 主轴长 Central tassel branch length | 0.6070* | 0.5580* | 0.3178 | 0.7899** | 0.6511** | 0.4437 |
主轴小花数 Central tassel flower number | 0.7211** | 0.7551** | 0.4336 | 0.7341** | 0.6079* | 0.4898 | |
分枝数 Tassel branch number | 0.6441** | 0.5593* | 0.5658* | 0.8242** | 0.7488** | 0.4379 | |
分枝小花密度Tassel branch spikelet density | 0.5432* | 0.6943** | 0.3372 | 0.8184** | 0.7597** | 0.5946* | |
花粉量 Pollen weight | 0.7325** | 0.7821** | 0.2890 | 0.9314** | 0.7433** | 0.4112 | |
花粉活力 Pollen activity | 0.8268** | 0.8279** | 0.4186 | 0.9002** | 0.6874** | 0.4067 |
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