Physiological and transcriptional analyses of induced post-anthesis thermo-tolerance by heat-shock pretreatment on germinating seeds of winter wheat
Physiological and transcriptional analyses of induced post-anthesis thermo-tolerance by heat-shock pretreatment on germinating seeds of winter wheat
复制标题
热激预处理诱导冬小麦发芽种子花后耐热性的生理和转录分析
DOI：
10.1016/j.envexpbot.2016.08.002
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发表时间：
2016-11
影响因子：
5.7
通讯作者：
Jiang Dong
中科院分区：
文献类型：
--
作者：
Zhang Xiaxiang;Zhou Qin;Wang Xiao;Cai Jian;Dai Tingbo;Cao Weixing;Jiang Dong
小麦灌浆期的高温胁迫是世界范围内限制小麦生产的环境因素。为了评价萌发期间热激预处理对花后热胁迫的缓解效果，首先将萌发的种子在40 °C下热激4小时。从开花后10天开始，对植株进行为期5天的高温胁迫。花后热胁迫导致籽粒产量显著降低。然而，热激预处理引起较少的产率损失。生理分析表明，预处理提高了叶片的光合作用和抗氧化能力，有利于减少产量损失。这与转录组学分析所揭示的相关基因的差异调节表达是一致的。此外，转录组分析表明，胁迫信号转导过程被触发，胁迫相关基因如热激蛋白和抗逆蛋白的表达上调。因此，热激预处理诱导的光合作用、抗氧化和热休克蛋白积累等生理过程的上调可能与热激预处理诱导的耐热性增强有关。
Heat stress occurring during grain filling is a worldwide environmental constraint limiting wheat production. To evaluate the alleviation effects of heat-shock pretreatment during germination on post-anthesis heat stress, germinating seeds were firstly heat-shocked at 40 °C for four hours. The plants were later given a five-day high temperature stress from ten days after anthesis. The post-anthesis heat stress resulted in significant grain yield reduction. However, the heat-shock pretreatment caused less yield loss. Physiological analyses revealed that capacities of leaf photosynthesis and antioxidation were improved to benefit the less yield loss in the pretreated plants. This was consistent with the differentially regulated expressions of the involving genes as revealed by the transcriptomic analysis. In addition, the transcriptome profiling indicated that the stress signaling processes were triggered, and expressions of stress related genes such as heat-shock proteins and osmotins were up-regulated in the pretreated plants. Thus, the up-regulated physiological processes of photosynthesis, antioxidation and HSPs accumulation because of the modified expressions of the related genes could contribute to the enhanced thermo-tolerance induced by heat-shock pretreatment.
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影响因子：
14.9
作者：
Tanz SK;Castleden I;Hooper CM;Vacher M;Small I;Millar HA
通讯作者：
Millar HA
影响因子：
7.4
作者：
Mariano Cossani, C.;Reynolds, Matthew P.
通讯作者：
Reynolds, Matthew P.
高温胁迫对水稻植株及其耐性相关性状的影响
影响因子：
2
作者：
Shah, F.;Huang, J.;Wang, K.
通讯作者：
Wang, K.
影响因子：
3.5
作者：
Dias, A. S.;Barreiro, M. G.;Lidon, F. C.
通讯作者：
Lidon, F. C.
影响因子：
7.4
作者：
Ainsworth, Elizabeth A.;Ort, Donald R.
通讯作者：
Ort, Donald R.