Phytochrome B Positively Regulates Chlorophyll Biosynthesis and Chloroplast Development in Rice
Year: 2012
Type: article
Abstract: Phytochrome family in rice is composed of three members,PHYA,PHYB,and PHYC.Through characterizing the phytochrome mutants and wild type(WT) in terms of photomorphogenesis,roles of individual phytochromes have been preliminarily explored in regulating rice de-etiolation,flowering time and fertility.We compared the chlorophyll contents of wild type and phyA,phyB and phyAphyB mutants grown either in white light(W) or in red light(R).The results suggest that phyB perceives red light to positively regulate chlorophyll biosynthesis,while the role of phyA can be detected only in the phyB-deficient mutant.Analyses on the expression levels of genes involved in chlorophyll biosynthesis revealed that phytochromes affected chlorophyll biosynthesis by regulating protochlorophyll oxidoreductase A(PORA) expression.The role of phyB in chloroplast development was analyzed.The results suggest that phyB perceive red light to regulate chloroplast development by affecting the number of chloroplasts and grana,as well as the chloroplast membrane system.
Source: Zhongguo shuidao kexue
Author: Xianzhi Xie
Language: English
Topic: Light effects on plants
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2354732058