Out of Shape During Stress: A Key Role for Auxin

First author: Ruud A. Korver; Affiliations: University of Amsterdam (阿姆斯特丹大学): Amsterdam, The Netherlands

Corresponding author: Christa Testerink

In most abiotic stress conditions, including salinity and water deficit, the developmental plasticity (可塑性) of the plant root is regulated by the phytohormone auxin. Changes in auxin concentration are often attributed to changes in shoot-derived long-distance auxin flow. However, recent evidence suggests important contributions by short-distance auxin transport from local storage and local auxin biosynthesis, conjugation (共轭), and oxidation during abiotic stress. We discuss here current knowledge on long-distance auxin transport in stress responses, and subsequently debate how short-distance auxin transport and indole-3-acetic acid (IAA) metabolism play a role in influencing eventual (最终的) auxin accumulation and signaling patterns. Our analysis stresses the importance of considering all these components together and highlights the use of mathematical modeling for predictions of plant physiological responses.

在盐害、水分缺失等大多数非生物胁迫条件下，植物根的发育可塑性是由植物激素生长素所调控的。生长素浓度的变化常常归咎于来自于茎尖合成的生长素的长距离运输。然而，近来的一些研究显示来自于局部贮藏的生长素短距离运输、局部组织生长素合成、共轭和氧化可能在胁迫响应中发挥着重要作用。作者综述了近来有关长距离生长素运输在胁迫响应中发挥作用的研究进展，同时还讨论了关于短距离生长素运输和吲哚-3-乙酸IAA代谢在影响生长素积累和信号模式等方面起的作用。本文的分析强调了综合考虑所有组分的重要性，并重点显示了通过数学建模的方法预测植物生理响应的优势。

通讯：Christa Testerink(https://www.wur.nl/en/Persons/Christa-prof.dr.-CS-Christa-Testerink.htm)

doi: https://doi.org/10.1016/j.tplants.2018.05.011

Journal: Trends in Plant Science

Available online: 15 June, 2018

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