Auxin response under osmotic stress
Auxin response under osmotic stress
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DOI：
10.1007/s11103-016-0476-5
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发表时间：
2016-08-01
影响因子：
5.1
通讯作者：
Shani, Eilon
中科院分区：
文献类型：
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作者：
Naser, Victoria;Shani, Eilon
植物激素生长素（吲哚-3-乙酸，IAA）是一种小有机分子，可协调植物发育和适应性生长的许多关键过程。植物在多个层面上调节生长素反应途径，包括生物合成、代谢、运输和感知。植物可塑性最引人注目的方面之一是根据不断变化的生长环境来调节发育。在这篇综述中，我们探讨了生长素反应依赖性生长和发育与渗透胁迫相关的最新发现。对缺水、脱水、盐和其他渗透胁迫的研究表明生长素途径中存在直接和间接的分子扰动。渗透胁迫刺激通过影响生长素生物合成（YUC、TAA1）、运输（PIN）、感知（TIR/AFB、Aux/IAA）和失活/结合（GH3、miR167、IAR3）来调节生长素反应，以协调生长和模式化。反过来，压力调节的生长素梯度驱动生理和发育机制，例如气孔孔径、水通道蛋白和侧根定位。我们的结论是，非生物胁迫条件下生长素介导的生长抑制是适应不断变化的环境的发育和生理策略之一。
The phytohormone auxin (indole-3-acetic acid, IAA) is a small organic molecule that coordinates many of the key processes in plant development and adaptive growth. Plants regulate the auxin response pathways at multiple levels including biosynthesis, metabolism, transport and perception. One of the most striking aspects of plant plasticity is the modulation of development in response to changing growth environments. In this review, we explore recent findings correlating auxin response-dependent growth and development with osmotic stresses. Studies of water deficit, dehydration, salt, and other osmotic stresses point towards direct and indirect molecular perturbations in the auxin pathway. Osmotic stress stimuli modulate auxin responses by affecting auxin biosynthesis (YUC, TAA1), transport (PIN), perception (TIR/AFB, Aux/IAA), and inactivation/conjugation (GH3, miR167, IAR3) to coordinate growth and patterning. In turn, stress-modulated auxin gradients drive physiological and developmental mechanisms such as stomata aperture, aquaporin and lateral root positioning. We conclude by arguing that auxin-mediated growth inhibition under abiotic stress conditions is one of the developmental and physiological strategies to acclimate to the changing environment.