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Phytochrome A Negatively Regulates the Shade Avoidance Response by Increasing Auxin/Indole Acidic Acid Protein Stability.

Dev. Cell. 2018; 
Yang Chuanwei,Xie Famin,Jiang Yupei,Li Zhen,Huang Xu,Li
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摘要

The reduction in the red to far-red light ratio (R/FR) and photosynthetically active radiation caused by dense planting initiates shade avoidance responses (SARs) to help plants compete against their neighbors. However, deep shade attenuates shade-induced stem elongation to suppress excessive reversion toward skotomorphogenic development, in which photoreceptor phytochrome A (PHYA) has been known to play the major role. However, the molecular mechanism underlying PHYA function in deep shade is poorly understood. Here, we report that shade-accumulated PHYA can release auxin/indole-3-acetic acid (AUX/IAA), suppressors in the auxin signaling pathway, from SCF, an auxin receptor, to weaken auxin sig... More

关键词

AUX/IAA,auxin signaling,phytochrome A,protein stability,shade avoidance resp