干旱区生态环境知识资源中心(Arid): Effects of drought treatment on photosystem II activity in the ephemeral plant Erodium oxyrhinchum

Arid

DOI	10.1007/s40333-023-0058-8
	Effects of drought treatment on photosystem II activity in the ephemeral plant Erodium oxyrhinchum
	Chen, Yingying; Lin, Yajun; Zhou, Xiaobing; Zhang, Jing; Yang, Chunhong; Zhang, Yuanming
通讯作者	Zhang, YM
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2023
卷号	15 期号:6 页码:724-739
英文摘要	Drought is a critical limiting factor affecting the growth and development of plants in arid and semi-arid areas. Photosynthesis, one of the most important physiological processes of plants, can be significantly inhibited by drought. Photosystem II (PSII) is considered the main attack target when photosynthesis is affected by drought. To clarify how PSII components of the ephemeral plant Erodium oxyrhinchum (grown in the Gurbantunggut Desert, China) respond to drought treatment, we evaluated the functional activity of PSII by determining chlorophyll fluorescence and gas exchange parameters under different drought treatment levels (control (400 mL), moderate drought (200 mL), and severe drought (100 mL)). Under moderate drought treatment, significant decreases were found in net photosynthetic rate (Pn), effective quantum yield of PSII (Y(II)), relative electron transfer rate of PSII (rETR(II)), oxygen-releasing complex, probability of an absorbed exciton moving an electron into the electron transport chain beyond primary quinone receptor Q(A)(-) (Phi(E-o)), probability of a trapped exciton moving an electron into the electron transport chain beyond primary quinone receptor Q(A)(-) (Psi(E-o)), and performance index of PSII (PIabs). Compared to control treatment, marked increases were observed in water use efficiency (WUE), relative variable fluorescence at the J step (V-J), initial fluorescence (F-o), and dissipated energy per active reaction center (DIo/RC) under moderate drought treatment, but there were no substantial changes in semi-saturated light intensity (I-K), active reaction centers per cross-section (RC/CS), and total performance index of PSII and PSI (PItotal, where PSI is the photosystem I). The changes of the above parameters under severe drought treatment were more significant than those under moderate drought treatment. In addition, severe drought treatment significantly increased the absorbed energy per active reaction center (ABS/RC) and trapping energy per active reaction center (TRo/RC) but decreased the energy transmission connectivity of PSII components, RC/CS, and PItotal, compared to moderate drought and control treatments. Principle component analysis (PCA) revealed similar information according to the grouping of parameters. Moderate drought treatment was obviously characterized by RC/ CS parameter, and the values of F-o, V-J, ABS/RC, DIo/RC, and TRo/ RC showed specific reactions to severe drought treatment. These results demonstrated that moderate drought treatment reduced the photochemical activity of PSII to a certain extent but E. oxyrhinchum still showed strong adaptation against drought treatment, while severe drought treatment seriously damaged the structure of PSII. The results of this study are useful for further understanding the adaptations of ephemeral plants to different water conditions and can provide a reference for the selection of relevant parameters for photosynthesis measurements of large samples in the field.
英文关键词	chlorophyll fluorescence drought treatment electron transport photosynthesis photosystem II Erodium oxyrhinchum Gurbantunggut Desert
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000994747500001
WOS关键词	PHOTOSYNTHETIC ELECTRON-TRANSPORT ; CHLOROPHYLL FLUORESCENCE ; DELAYED FLUORESCENCE ; HIGH-LIGHT ; DESERT ; RESPONSES ; STRESS ; WATER ; GROWTH ; INDUCTION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397185
推荐引用方式 GB/T 7714	Chen, Yingying,Lin, Yajun,Zhou, Xiaobing,et al. Effects of drought treatment on photosystem II activity in the ephemeral plant Erodium oxyrhinchum[J],2023,15(6):724-739.
APA	Chen, Yingying,Lin, Yajun,Zhou, Xiaobing,Zhang, Jing,Yang, Chunhong,&Zhang, Yuanming.(2023).Effects of drought treatment on photosystem II activity in the ephemeral plant Erodium oxyrhinchum.JOURNAL OF ARID LAND,15(6),724-739.
MLA	Chen, Yingying,et al."Effects of drought treatment on photosystem II activity in the ephemeral plant Erodium oxyrhinchum".JOURNAL OF ARID LAND 15.6(2023):724-739.