Tracking chlorophyll fluorescence as an indicator of drought and rewatering across the entire leaf lifespan in a maize field

doi:10.1016/j.agwat.2018.09.050

	Tracking chlorophyll fluorescence as an indicator of drought and rewatering across the entire leaf lifespan in a maize field
	Li, Yibo 1; Son, He 1; Zhou, Li 2; Xu, Zhenzhu; Zhou, Guangsheng 2
	2019
发表期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
卷号	211 页码:190-201
摘要	Plant growth and photosynthesis in response to water status have been extensively investigated. However, elucidating the photosynthetic process and its indicators under a drought episode and rewatering across the entire leaf lifespan is often neglected. In this experiment, three water treatments were set during two growth seasons: a control treatment, moderate persistent drought (T-1), and severe persistent drought (T-2). Maize leaf chlorophyll fluorescence emission was analyzed to determine the regulative responses of the photosynthetic potentials and photosystem II (PSII) photochemistry process to drought and rewatering in situ. A severe drought episode during the peak vegetative growth stage resulted in decreases in chlorophyll content, the maximal efficiency of PSII photochemistry (F-v/F-m), and photochemical quenching, but increases in non-photochemical quenching and the yield for dissipation by downregulation. Rewatering only restored partial PSII functions in plants that had undergone historical drought episodes. An analysis of non-photochemical pathways of thermal dissipation indicates that regulative photoprotection of the photosystem apparatus may occur through heat dissipation when an effect of severe drought episode appeared on a young leaf; however, rewatering did not enhance photoprotection with leaf aging. Compared to the control treatment, the yield of T-1 and T-2 decreased by 25.1% and 27.1% in 2015, and 26.4% and 54.3% in 2016, respectively. The chlorophyll content was significantly and closely correlated with F-v/F-m (R = 0.65, P < 0.001) and the maximum versus minimum fluorescence yield in the dark-adapted state (F-m/F-o)(R = 0.72, P < 0.001). Additionally, the two parameters can be suggested to feasibly track chlorophyll content changes and the degree of leaf senescence in responses to a drought episode and its interaction with leaf aging: F-m/F-o and the relative limitation to photosynthesis (RLP). The current results may provide a profound insight into better understanding the underlying mechanism of photosynthetic potentials and photochemistry efficiency and photoprotection in response to drought episodes and rewatering over the entire leaf lifespan.
关键词	Drought episode Climatic change Zea mays L. Photosynthetic potentials Chlorophyll fluorescence Leaf lifespan
学科领域	Agronomy ; Water Resources
DOI	10.1016/j.agwat.2018.09.050
收录类别	SCI
语种	英语
WOS关键词	FREQUENTLY ASKED QUESTIONS ; PHOTOSYSTEM-II ; WATER-STRESS ; RESPONSES ; PHOTOSYNTHESIS ; GROWTH ; RECOVERY ; WHEAT ; PHOTOPROTECTION ; IMPACTS
WOS研究方向	Agriculture ; Water Resources
WOS记录号	WOS:000449139500020
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1873-2283
资助机构	China Special Fund for Meteorological Research in the Public Interest [GYHY201506019] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41330531, 31661143028]
作者邮箱	xuzz@ibcas.ac.cn ; gszhou@ibcas.ac.cn
引用统计	被引频次：49[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/19639
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Meteorol Sci, China Meteorol Adm, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Li, Yibo,Son, He,Zhou, Li,et al. Tracking chlorophyll fluorescence as an indicator of drought and rewatering across the entire leaf lifespan in a maize field[J]. AGRICULTURAL WATER MANAGEMENT,2019,211:190-201.
APA	Li, Yibo,Son, He,Zhou, Li,Xu, Zhenzhu,&Zhou, Guangsheng.(2019).Tracking chlorophyll fluorescence as an indicator of drought and rewatering across the entire leaf lifespan in a maize field.AGRICULTURAL WATER MANAGEMENT,211,190-201.
MLA	Li, Yibo,et al."Tracking chlorophyll fluorescence as an indicator of drought and rewatering across the entire leaf lifespan in a maize field".AGRICULTURAL WATER MANAGEMENT 211(2019):190-201.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
j.agwat.2018.09.050.（3470KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文