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Integration of Light and Brassinosteroid Signaling during Seedling Establishment

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Publisher

MDPI
DOI: 10.3390/ijms222312971

Keywords

photomorphogenesis; skotomorphogenesis; light; brassinosteroids; brassinolide; Arabidopsis

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Light and brassinosteroid (BR) are important external and internal signals in plant growth and development. Recent studies have identified key components that integrate light and BR signals in regulating seedling morphology and development.
Light and brassinosteroid (BR) are external stimuli and internal cue respectively, that both play critical roles in a wide range of developmental and physiological process. Seedlings grown in the light exhibit photomorphogenesis, while BR promotes seedling etiolation. Light and BR oppositely control the development switch from shotomorphogenesis in the dark to photomorphogenesis in the light. Recent progress report that substantial components have been identified as hubs to integrate light and BR signals. Photomorphogenic repressors including COP1, PIFs, and AGB1 have been reported to elevate BR response, while photomorphogenesis-promoting factors such as HY5, BZS1, and NF-YCs have been proven to repress BR signal. In addition, BR components also modulate light signal. Here, we review the current research on signaling network associated with light and brassinosteroids, with a focus on the integration of light and BR signals enabling plants to thrive in the changeable environment.

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