The Effects of Brief Heat During Early Booting on Reproductive, Developmental, and Chlorophyll Physiological Performance in Common Wheat (Triticum aestivum L.).
The Effects of Brief Heat During Early Booting on Reproductive, Developmental, and Chlorophyll Physiological Performance in Common Wheat (Triticum aestivum L.).
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DOI：
10.3389/fpls.2022.886541
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发表时间：
2022
影响因子：
5.6
通讯作者：
Heuer, Sigrid
中科院分区：
文献类型：
--
作者：
Xu, Jiemeng;Lowe, Claudia;Hernandez-Leon, Sergio G.;Dreisigacker, Susanne;Reynolds, Matthew P.;Valenzuela-Soto, Elisa M.;Paul, Matthew J.;Heuer, Sigrid
气候变化导致的气温上升威胁着农作物的生产力。作为一种冷季作物，小麦对热敏感，但在种植期间经常暴露在高温下。在当前的研究中，在敏感花粉发育阶段，将一组春小麦基因型，包括假定的耐热澳大利亚和CIMMYT基因型，暴露在5天的轻度（34°C/28°C，昼/夜）或极端（37°C/27°C）热胁迫下。随着热胁迫从轻微到极端的增加，对花药形态的影响越来越严重。即使在温和的高温条件下，与对照（21°C/15°C）相比，初生穗的花粉活力和每穗粒数也显著下降，Sunstar和两个CIMMYT选品系表现良好。这两种性状的热特异正相关表明花粉育性在坐粒过程中起重要作用。有趣的是，在热胁迫后，温和和极端的高温都诱导了新分蘖的发育，为积累的光合物质提供了一个替代的汇，并显著促进了最终产量。旗叶光系统II最大潜在量子效率（Fv/Fm）的测量结果显示，在热处理后，旗叶光系统II的最大潜在量子效率受到抑制，随后在几天内完全恢复。尽管如此，利用叶绿素土壤植物分析发展（SPAD）测量的模型拟合显示，在热胁迫下，植物的衰老速度更快或更早。本文提供的数据为进一步研究花粉肥力、分蘖动态和叶片在高温下的衰老提供了有趣的切入点。所鉴定的耐高温小麦基因型可用于剖析其潜在机制和培育气候适应型小麦。
Rising temperatures due to climate change threaten agricultural crop productivity. As a cool-season crop, wheat is heat-sensitive, but often exposed to high temperatures during the cultivation period. In the current study, a bread wheat panel of spring wheat genotypes, including putatively heat-tolerant Australian and CIMMYT genotypes, was exposed to a 5-day mild (34°C/28°C, day/night) or extreme (37°C/27°C) heat stress during the sensitive pollen developmental stage. Worsening effects on anther morphology were observed, as heat stress increased from mild to extreme. Even under mild heat, a significant decrease in pollen viability and number of grains per spike from primary spike was observed compared with the control (21°C/15°C), with Sunstar and two CIMMYT breeding lines performing well. A heat-specific positive correlation between the two traits indicates the important role of pollen fertility for grain setting. Interestingly, both mild and extreme heat induced development of new tillers after the heat stress, providing an alternative sink for accumulated photosynthates and significantly contributing to the final yield. Measurements of flag leaf maximum potential quantum efficiency of photosystem II (Fv/Fm) showed an initial inhibition after the heat treatment, followed by a full recovery within a few days. Despite this, model fitting using chlorophyll soil plant analysis development (SPAD) measurements showed an earlier onset or faster senescence rate under heat stress. The data presented here provide interesting entry points for further research into pollen fertility, tillering dynamics, and leaf senescence under heat. The identified heat-tolerant wheat genotypes can be used to dissect the underlying mechanisms and breed climate-resilient wheat.
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影响因子：
7.4
作者：
Mariano Cossani, C.;Reynolds, Matthew P.
通讯作者：
Reynolds, Matthew P.
影响因子：
6.9
作者：
Chavan, Sachin G.;Duursma, Remko A.;Ghannoum, Oula
通讯作者：
Ghannoum, Oula
影响因子：
5.8
作者：
Dwivedi, S. K.;Basu, Sahana;Arora, A.
通讯作者：
Arora, A.
影响因子：
6.9
作者：
Fernandez-Gomez, Jose;Talle, Behzad;Wilson, Zoe A.
通讯作者：
Wilson, Zoe A.
植被指数和光合参数检测小麦热胁迫能力的比较
影响因子：
6.2
作者：
Cao, Zhongsheng;Yao, Xia;Zhu, Yan
通讯作者：
Zhu, Yan