首页|Green light mediates atypical photomorphogenesis by dual modulation of Arabidopsis phytochromes B and A

Green light mediates atypical photomorphogenesis by dual modulation of Arabidopsis phytochromes B and A

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Although green light(GL)is located in the middle of the visible light spectrum and regulates a series of plant developmental processes,the mechanism by which it regulates seedling development is largely unknown.In this study,we demonstrated that GL promotes atypical photomorphogenesis in Arabidopsis thaliana via the dual regulations of phytochrome B(phyB)and phyA.Although the Pr-to-Pfr conversion rates of phyB and phyA under GL were lower than those under red light(RL)in a fluence rate-dependent and time-dependent manner,long-term treatment with GL induced high Pfr/Pr ratios of phyB and phyA.Moreover,GL induced the formation of numerous small phyB photobodies in the nucleus,resulting in atypical photomorphogenesis,with smaller cotyledon opening angles and longer hypocotyls in seed-lings compared to RL.The abundance of phyA significantly decreased after short-and long-term GL treatments.We determined that four major PHYTOCHROME-INTERACTING FACTORs(PIFs:PIF1,PIF3,PIF4,and PIF5)act downstream of phyB in GL-mediated cotyledon opening.In addi-tion,GL plays opposite roles in regulating different PIFs.For example,under continuous GL,the protein levels of all PIFs decreased,whereas the transcript levels of PIF4 and PIF5 strongly increased compared with dark treatment.Taken together,our work provides a detailed molecular framework for understanding the role of the antagonistic regulations of phyB and phyA in GL-mediated atypical photomorphogenesis.

cotyledon developmentgreen lightphotobodyphytochromePIF3

Miqi Xu、Yi-Yuan Wang、Yujie Wu、Xiuhong Zhou、Ziyan Shan、Kunying Tao、Kaiqiang Qian、Xuncheng Wang、Jian Li、Qingqing Wu、Xing Wang Deng、Jun-Jie Ling

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National Engineering Laboratory of Crop Stress Resistance Breeding,School of Life Sciences,Anhui Agricultural University,Hefei 230036,China

Province Key Laboratory of Resource Insect Biology and Innovative Utilization,School of Life Sciences,Anhui Agricultural University,Hefei 230036,China

Biotechnology Center,State Key Laboratory of Tea Plant Biology and Utilization,School of Tea and Food Sciences and Technology,Anhui Agricultural University,Hefei 230036,China

Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China,Institute of Plant and Environment Protection,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China

College of Life Sciences,Nanjing Normal University,Nanjing 210023,China

State Key Laboratory of Protein and Plant Gene Research,Peking-Tsinghua Center for Life Sciences,School of Advanced Agriculture Sciences,and School of Life Sciences,Peking University,Beijing 100871,China

State Key Laboratory of Wheat Improvement,Shandong Laboratory of Advanced Agricultural Sciences at Weifang,Peking University Institute of Advanced Agricultural Sciences,Weifang 261000,China

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Excellent Young Talents Fund Program of Higher Education Institutions of Anhui ProvinceAnhui Agricultural University Startup FundAnhui Province Fund for University Development

2023AH030049rc42211522103103

2024

10.1111/jipb.13742

植物学报(英文版)
中国植物学会

植物学报(英文版)

CSTPCD
影响因子：0.921
ISSN：1672-9072
年,卷(期)：2024.66(9)
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