油菜素甾醇
下胚轴
隐色素
拟南芥
光敏色素
生物
光形态发生
避光
延伸率
拟南芥
植物
绿灯
远红色
细胞生物学
转录因子
信号转导
蓝光
生物物理学
突变体
生物化学
红灯
基因
物理
光学
冶金
材料科学
极限抗拉强度
生物钟
作者
Yuhan Hao,Zexian Zeng,Xiaolin Zhang,Dixiang Xie,Xu Li,Libang Ma,Muqing Liu,Hongtao Liu
出处
期刊:The Plant Cell
[Oxford University Press]
日期:2023-02-01
卷期号:35 (5): 1304-1317
被引量:7
标识
DOI:10.1093/plcell/koad022
摘要
Abstract Although many studies have elucidated the mechanisms by which different wavelengths of light (blue, red, far-red, or ultraviolet-B [UV-B]) regulate plant development, whether and how green light regulates plant development remains largely unknown. Previous studies reported that green light participates in regulating growth and development in land plants, but these studies have reported conflicting results, likely due to technical problems. For example, commercial green light-emitting diode light sources emit a little blue or red light. Here, using a pure green light source, we determined that unlike blue, red, far-red, or UV-B light, which inhibits hypocotyl elongation, green light promotes hypocotyl elongation in Arabidopsis thaliana and several other plants during the first 2–3 d after planting. Phytochromes, cryptochromes, and other known photoreceptors do not mediate green-light-promoted hypocotyl elongation, but the brassinosteroid (BR) signaling pathway is involved in this process. Green light promotes the DNA binding activity of BRI1-EMS-SUPPRESSOR 1 (BES1), a master transcription factor of the BR pathway, thus regulating gene transcription to promote hypocotyl elongation. Our results indicate that pure green light promotes elongation via BR signaling and acts as a shade signal to enable plants to adapt their development to a green-light-dominant environment under a canopy.
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