Turning up the volume: How root branching adaptive responses aid water foraging.
Turning up the volume: How root branching adaptive responses aid water foraging.
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DOI：
10.1016/j.pbi.2023.102405
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发表时间：
2023-06
影响因子：
9.5
通讯作者：
P. Mehra;Rebecca Fairburn;N. Leftley;Jason Banda;M. Bennett
中科院分区：
文献类型：
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作者：
P. Mehra;Rebecca Fairburn;N. Leftley;Jason Banda;M. Bennett
获得水对所有形式的生命都至关重要。植物主要通过根部获取水分。根系特征如分枝对水分供应高度敏感，使植物能够适应其根系结构以匹配土壤水分分布。侧根的适应性反应，水模式和旱枝确保新的分支只有在根直接接触潮湿的土壤形成。根系性状也受到大气湿度的强烈影响，其中快速下降导致促进根系生长和分枝。植物激素生长素和/或脱落酸（阿坝）在调节这些适应性反应中起关键作用。我们讨论了这些信号是如何一种新的“水感”机制，耦合激素运动与水动力学协调根分支反应的一部分。
Access to water is critical for all forms of life. Plants primarily access water through their roots. Root traits such as branching are highly sensitive to water availability, enabling plants to adapt their root architecture to match soil moisture distribution. Lateral root adaptive responses hydropatterning and xerobranching ensure new branches only form when roots are in direct contact with moist soil. Root traits are also strongly influenced by atmospheric humidity, where a rapid drop leads to a promotion of root growth and branching. The plant hormones auxin and/or abscisic acid (ABA) play key roles in regulating these adaptive responses. We discuss how these signals are part of a novel “water-sensing” mechanism that couples hormone movement with hydrodynamics to orchestrate root branching responses.