Arabidopsis ANGUSTIFOLIA3 (AN3) is associated with the promoter of CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1) to regulate light‐mediated stomatal development

【来源:草地农业科技学院 | 发布日期:2018-05-31 | 作者:办公室 】    

Title: Arabidopsis ANGUSTIFOLIA3 (AN3) is associated with the promoter of CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1) to regulate lightmediated stomatal development

Authors: LaiSheng Meng*, Cong Li, MengKe Xu, XuDong Sun, Wen Wan, XiaoYing Cao, JinLin Zhang(张金林)*, KunMing Chen*

Journal: Plant Cell & Environment (SCI 生物一区,TOP,IF2016 = 6.173)

Doi: 10.1111/pce.13212

Abstract: Light signals are perceived by multiple photoreceptors that converge to suppress the RING E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1) for the regulation of stomatal development. Thus, COP1 is a point of integration between light signaling and stomatal patterning. However, how light signaling is collected into COP1 for the production and spacing of stomata is still unknown. Here, we report that the lossoffunction mutant of ANGUSTIFOLIA3 (AN3) delays asymmetric cell division, which leads to decreased stomatal index. Furthermore, overexpression of AN3 accelerates asymmetric cell division, which results in clusters of stomata. In addition, the stomatal development through AN3 regulation is mediated by light signaling. Finally, we find that an3 is a lightsignaling mutant, and that AN3 protein is light regulated. Selfactivation by AN3 contributes to the control of AN3 expression. Thus, AN3 is a point of collection between light signaling and stomatal patterning. Targetgene analysis indicates that AN3 is associated with COP1 promoter for the regulation of lightcontrolling stomatal development. Together, these components for regulating stomatal development form an AN3–COP1–E3 ubiquitin ligase complex, allowing the integration of light signaling into the production and spacing of stomata.





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