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Position: Home > Articles > Integration of light and hormone signaling pathways in the regulation of plant shade avoidance syndrome aBIOTECH 2021,2 (2)

Integration of light and hormone signaling pathways in the regulation of plant shade avoidance syndrome

作  者：
Yang Liu;Feresheeh Jafari;Haiyang Wan
单  位：
Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China; State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, Chin;Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
关键词：
Arabidopsis;Hormones;Light;Shade avoidance syndrome (SAS);Signalin
摘  要：
As sessile organisms, plants are unable to move or escape from their neighboring competitors under high-density planting conditions. Instead, they have evolved the ability to sense changes in light quantity and quality (such as a reduction in photoactive radiation and drop in red/far-red light ratios) and evoke a suite of adaptative responses (such as stem elongation, reduced branching, hyponastic leaf orientation, early flowering and accelerated senescence) collectively termed shade avoidance syndrome (SAS). Over the past few decades, much progress has been made in identifying the various photoreceptor systems and light signaling components implicated in regulating SAS, and in elucidating the underlying molecular mechanisms, based on extensive molecular genetic studies with the model dicotyledonous plant Arabidopsis thaliana. Moreover, an emerging synthesis of the field is that light signaling integrates with the signaling pathways of various phytohormones to coordinately regulate different aspects of SAS. In this review, we present a brief summary of the various cross-talks between light and hormone signaling in regulating SAS. We also present a perspective of manipulating SAS to tailor crop architecture for breeding high-density tolerant crop cultivars.

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