Photosynthetic regulation under fluctuating light in young and mature leaves of the CAM plant Bryophyllum pinnatum

doi:10.1016/j.bbabio.2019.04.006

CORC > 昆明植物研究所 > 中国科学院昆明植物研究所 > 资源植物与生物技术所级重点实验室

	Photosynthetic regulation under fluctuating light in young and mature leaves of the CAM plant Bryophyllum pinnatum
	Yang, Ying-Jie 1,2; Zhang, Shi-Bao1 ; Huang, Wei1
刊名	BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
	2019-06-01
卷号	1860 期号:6 页码:469-477
关键词	Photoprotection Photosystem I Proton gradient Redox state of P700 Water-water cycle Leaf development
ISSN号	0005-2728
DOI	10.1016/j.bbabio.2019.04.006
通讯作者	Zhang, Shi-Bao(sbzhang@mail.kib.ac.cn) ; Huang, Wei(huangwei@mail.kib.ac.cn)
英文摘要	Photosystem I (PSI) is the potential target of photodamage under fluctuating light in angiosperms. However, the response of PSI to fluctuating light in young leaves has not yet been clarified. Furthermore, the photosynthetic regulation under fluctuating light in crassulacean acid metabolism (CAM) plants is little known. In this study, we measured PSI redox state and the electrochromic shift signal in the mature and young leaves of a CAM species Botophyllum pinnatum. The mature leaves showed stronger capacity for photo-reduction of O-2 mediated by the alternative electron flow (probably the water-water cycle) when compared with the young leaves. After an increase in light intensity, both the mature and young leaves showed insufficient proton gradient (Delta pH) across the thylakoid membranes within the first seconds. Meanwhile, PSI was highly oxidized in the mature leaves but was in a more reduced state in the young leaves. Furthermore, young leaves were more susceptible to PSI photoinhibition under fluctuating light. Therefore, in the mature leaves, the alternative electron flow significantly optimized the PSI redox state under fluctuating light at relatively low Delta pH. By comparison, in the young leaves, Delta pH redox state was largely determined by the buildup of Delta pH. Therefore, the major photo protective mechanism responsible for safeguarding PSI under fluctuating light can be influenced by leaf developmental stages.
WOS研究方向	Biochemistry & Molecular Biology ; Biophysics
语种	英语
WOS记录号	WOS:000471082200004
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn/handle/151853/67342]
专题	昆明植物研究所_资源植物与生物技术所级重点实验室
通讯作者	Zhang, Shi-Bao; Huang, Wei
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, Ying-Jie,Zhang, Shi-Bao,Huang, Wei. Photosynthetic regulation under fluctuating light in young and mature leaves of the CAM plant Bryophyllum pinnatum[J]. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,2019,1860(6):469-477.
APA	Yang, Ying-Jie,Zhang, Shi-Bao,&Huang, Wei.(2019).Photosynthetic regulation under fluctuating light in young and mature leaves of the CAM plant Bryophyllum pinnatum.BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,1860(6),469-477.
MLA	Yang, Ying-Jie,et al."Photosynthetic regulation under fluctuating light in young and mature leaves of the CAM plant Bryophyllum pinnatum".BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1860.6(2019):469-477.