Abiotic Stress Signaling in Wheat - An Inclusive Overview of Hormonal Interactions During Abiotic Stress Responses in Wheat.
Abiotic Stress Signaling in Wheat - An Inclusive Overview of Hormonal Interactions During Abiotic Stress Responses in Wheat.
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DOI：
10.3389/fpls.2018.00734
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发表时间：
2018
影响因子：
5.6
通讯作者：
Samuel MA
中科院分区：
文献类型：
--
作者：
Abhinandan K;Skori L;Stanic M;Hickerson NMN;Jamshed M;Samuel MA
全球快速变暖直接影响农业生产力，对当今农业构成重大挑战。最近的气候变化模型预测，由于环境变化，全球农作物产量将出现严重损失，而在小麦中，这一损失可能高达42Mt/°C的升温。虽然小麦在包括水稻和玉米在内的谷物中占有最大的总收获面积(38.8%)，但其总生产力仍然是最低的。小麦的主要产量损失更多地是由干旱、盐碱和高温等非生物胁迫造成的，而不是生物胁迫。因此，了解这些胁迫的影响对于小麦改良计划来说是必不可少的，因为小麦改良计划主要依赖于通过常规育种存在于小麦基因组中的遗传变异。值得注意的是，最近生物技术在了解基因功能和获取全基因组序列方面的突破为作物改良开辟了新的途径。尽管小麦中存在这样的资源，但进展仍然局限于利用拟南芥、水稻和担子等模式植物来了解胁迫信号机制，而不是直接使用小麦作为模式生物。本文综述了小麦在各种非生物胁迫下的表型和生理变化，以及小麦感知和信号转导机制的研究现状。具体地说，本综述对小麦在非生物胁迫信号传递过程中观察到的不同激素相互作用和信号传递进行了深入的分析。
Rapid global warming directly impacts agricultural productivity and poses a major challenge to the present-day agriculture. Recent climate change models predict severe losses in crop production worldwide due to the changing environment, and in wheat, this can be as large as 42 Mt/°C rise in temperature. Although wheat occupies the largest total harvested area (38.8%) among the cereals including rice and maize, its total productivity remains the lowest. The major production losses in wheat are caused more by abiotic stresses such as drought, salinity, and high temperature than by biotic insults. Thus, understanding the effects of these stresses becomes indispensable for wheat improvement programs which have depended mainly on the genetic variations present in the wheat genome through conventional breeding. Notably, recent biotechnological breakthroughs in the understanding of gene functions and access to whole genome sequences have opened new avenues for crop improvement. Despite the availability of such resources in wheat, progress is still limited to the understanding of the stress signaling mechanisms using model plants such as Arabidopsis, rice and Brachypodium and not directly using wheat as the model organism. This review presents an inclusive overview of the phenotypic and physiological changes in wheat due to various abiotic stresses followed by the current state of knowledge on the identified mechanisms of perception and signal transduction in wheat. Specifically, this review provides an in-depth analysis of different hormonal interactions and signaling observed during abiotic stress signaling in wheat.
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