脱落酸
拟南芥
韧皮部
植物
非生物成分
拟南芥
费斯特共振能量转移
生物
生物物理学
化学
荧光
物理
生物化学
生态学
量子力学
基因
突变体
作者
James Rowe,Mathieu Grangé-Guermente,Marino Expósito‐Rodríguez,Rinukshi Wimalasekera,Martin O. Lenz,K.N. Shetty,Sean R. Cutler,Alexander M. Jones
出处
期刊:Nature plants
[Springer Nature]
日期:2023-06-26
卷期号:9 (7): 1103-1115
被引量:10
标识
DOI:10.1038/s41477-023-01447-4
摘要
The plant hormone abscisic acid (ABA) accumulates under abiotic stress to recast water relations and development. To overcome a lack of high-resolution sensitive reporters, we developed ABACUS2s-next-generation Förster resonance energy transfer (FRET) biosensors for ABA with high affinity, signal-to-noise ratio and orthogonality-that reveal endogenous ABA patterns in Arabidopsis thaliana. We mapped stress-induced ABA dynamics in high resolution to reveal the cellular basis for local and systemic ABA functions. At reduced foliar humidity, root cells accumulated ABA in the elongation zone, the site of phloem-transported ABA unloading. Phloem ABA and root ABA signalling were both essential to maintain root growth at low humidity. ABA coordinates a root response to foliar stresses, enabling plants to maintain foraging of deeper soil for water uptake.
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