Connected phytohormone biosynthesis pathways at the core of growth-stress tradeoffs.
Connected phytohormone biosynthesis pathways at the core of growth-stress tradeoffs.
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DOI：
10.1016/j.molp.2022.06.005
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发表时间：
2022-07-04
期刊：
影响因子：
27.5
通讯作者：
Strader, Lucia
中科院分区：
文献类型：
--
作者：
Sageman-Furnas, Katelyn;Strader, Lucia
植物在环境胁迫下如何调节自身的生长以维持生存是未来粮食安全的一个关键问题。干旱和高盐都代表渗透胁迫，严重降低全球作物产量。了解植物如何科普这些压力变得越来越重要，因为世界面临着耕地的迅速恶化。植物通过激活胁迫回避或胁迫耐受途径、重编程基因调控网络和增加保护性溶质来响应胁迫（综述于Claeys和Inze，2013; Zhang等人，2020年）。增加胁迫耐受性的主要结果是减少生长，在生长和胁迫耐受性之间产生必要的权衡植物必须小心地管理这种权衡以在胁迫下生存并保持竞争力。最近，刘等人的一项研究。（2022）证明了一种实现这些权衡的新机制。植物通过平衡生长促进激素（如生长素）和胁迫反应激素（如脱落酸或乙烯）来管理生长和胁迫反应之间的权衡。脱落酸（阿坝）在干旱和高盐响应中是必不可少的。植物严格调节阿坝代谢，并在理想条件下将其保持在低水平。植物在渗透胁迫下激活胁迫耐受途径，导致阿坝积累增加。这种增加的阿坝触发生长的限制和增加的胁迫耐受性。相比之下，生长素是植物生长的主要调节剂，几乎参与植物发育的各个方面（Enders和Strader，2015）。尽管渗透胁迫通过影响其生物合成、感知、运输和代谢来改变生长素反应（综述于Naser和Shani，2016; Shani et al.，2017年），缺乏对生长素在应激反应中作用的机械见解。最近，Liu et al.（2022）发现色氨酸和生长素生物合成途径中的一种关键酶通过调节阿坝积累在盐度和干旱反应中起关键协调作用
How plants experiencing environmental stress regulate their growth to survive is a fundamental question crucial for future food security. Drought and high salinity both represent osmotic stresses that severely decrease crop yields worldwide. Understanding how plants cope with these stresses becomes increasingly critical as the world faces a rapid deterioration of arable land. Plants respond to stress by activating stress-avoidance or stress-tolerance pathways, reprogramming gene regulatory networks, and increasing protective solutes (reviewed in Claeys and Inze, 2013; Zhang et al., 2020). A primary outcome of increasing stress tolerance is reduced growth, creating an essential tradeoff between growth and stress tolerance—plants must carefully manage this tradeoff to survive the stress and maintain competitiveness. Recently, a study by Liu et al.(2022) demonstrated a new mechanism in which these tradeoffs are achieved.Plants manage the tradeoff between growth and stress response by balancing growth-promoting hormones, such as auxin, and stress-response hormones, such as abscisic acid or ethylene. Abscisic acid (ABA) is essential in drought and high-salinity responses. Plants tightly regulate ABA metabolism and keep it at low levels under ideal conditions. Plants activate stress-tolerance pathways upon osmotic stress, leading to increased ABA accumulation. This increased ABA triggers restriction of growth and increased stress tolerance. In contrast, auxin is a master regulator of plant growth and is involved in almost every aspect of plant development (Enders and Strader, 2015). Although osmotic stress alters auxin response by affecting its biosynthesis, perception, transport, and metabolism (reviewed in Naser and Shani, 2016; Shani et al., 2017), mechanistic insight into auxin’s role in stress response is lacking. Recently, Liu et al.(2022) found that a critical enzyme in the tryptophan and auxin biosynthesis pathways acts as a key coordinator in salinity and drought response by regulating ABA accumulation
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DOI：
10.1016/j.cub.2016.12.016
发表时间：
2017-02-06
期刊：
Current biology : CB
影响因子：
--
作者：
Shani E;Salehin M;Zhang Y;Sanchez SE;Doherty C;Wang R;Mangado CC;Song L;Tal I;Pisanty O;Ecker JR;Kay SA;Pruneda-Paz J;Estelle M
通讯作者：
Estelle M
影响因子：
14.8
作者：
Zheng, Zuyu;Guo, Yongxia;Novak, Ondrej;Dai, Xinhua;Zhao, Yunde;Ljung, Karin;Noel, Joseph P.;Chory, Joanne
通讯作者：
Chory, Joanne
影响因子：
3
作者：
Enders TA;Strader LC
通讯作者：
Strader LC
影响因子：
5.1
作者：
Naser, Victoria;Shani, Eilon
通讯作者：
Shani, Eilon
影响因子：
7.4
作者：
Liu, Wen;Li, Rong-Jun;Lu, Ying-Tang
通讯作者：
Lu, Ying-Tang