干旱区生态环境知识资源中心(Arid): Temporal heterogeneity in photosystem II photochemistry in Artemisia ordosica under a fluctuating desert environment

Arid

DOI	10.3389/fpls.2022.1057943
	Temporal heterogeneity in photosystem II photochemistry in Artemisia ordosica under a fluctuating desert environment
	Jin, Chuan; Zha, Tianshan; Bourque, Charles P. -A.; Jia, Xin; Tian, Yun; Liu, Peng; Li, Xinhao; Liu, Xinyue; Guo, Xiaonan; Xu, Mingze; Kang, Xiaoyu; Guo, Zifan; Wang, Ning
通讯作者	Zha, TS
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2022
卷号	13
英文摘要	Acclimation strategies in xerophytic plants to stressed environmental conditions vary with temporal scales. Our understanding of environmentally-induced variation in photosystem II (PSII) processes as a function of temporal scales is limited, as most studies have thus far been based on short-term, laboratory-controlled experiments. In a study of PSII processes, we acquired near-continuous, field-based measurements of PSII-energy partitioning in a dominant desert-shrub species, namely Artemisia ordosica, over a six-year period from 2012-2017. Continuous-wavelet transformation (CWT) and wavelet coherence analyses (WTC) were employed to examine the role of environmental variables in controlling the variation in the three main PSII-energy allocation pathways, i.e., photochemical efficiency and regulated and non-regulated thermal dissipation, i.e., phi(PSII), phi(NPQ), and phi(NO), respectively, across a time-frequency domain from hours to years. Convergent cross mapping (CCM) was subsequently used to isolate cause-and-effect interactions in PSII-energy partitioning response. The CWT method revealed that the three PSII-energy allocation pathways all had distinct daily periodicities, oscillating abruptly at intermediate timescales from days to weeks. On a diurnal scale, WTC revealed that all three pathways were influenced by photosynthetically active radiation (PAR), air temperature (T-a), and vapor pressure deficit (VPD). By comparing associated time lags for the three forms of energy partitioning at diurnal scales, revealed that the sensitivity of response was more acutely influenced by PAR, declining thereafter with the other environmental variables, such that the order of influence was greatest for T-a, followed by VPD, and then soil water content (SWC). PSII-energy partitioning on a seasonal scale, in contrast, displayed greater variability among the different environmental variables, e.g., phi(PSII) and phi(NO) being more predisposed to changes in T-a, and phi(NPQ) to changes in VPD. CCM confirmed the causal relationship between pairings of PSII-energy allocation pathways, according to shrub phenology. A. ordosica is shown to have an innate ability to (i) repair damaged PSII-photochemical apparatus (maximum quantum yield of PSII photochemistry, with F-v/F-m > 0.78), and (ii) acclimatize to excessive PAR, dry-air conditions, and prolonged drought. A. ordosica is relatively sensitive to extreme temperature and exhibits photoinhibition.
英文关键词	arid regions chlorophyll fluorescence desert plant diurnal variation seasonal fluctuations wavelet analysis
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000886307500001
WOS关键词	ECOSYSTEM CO2 EXCHANGE ; HIGH-TEMPERATURE ; ENERGY-DISSIPATION ; XANTHOPHYLL CYCLE ; WAVELET COHERENCE ; QUANTUM YIELD ; HIGH LIGHT ; PHOTOSYNTHESIS ; DROUGHT ; STRESS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392843
推荐引用方式 GB/T 7714	Jin, Chuan,Zha, Tianshan,Bourque, Charles P. -A.,et al. Temporal heterogeneity in photosystem II photochemistry in Artemisia ordosica under a fluctuating desert environment[J],2022,13.
APA	Jin, Chuan.,Zha, Tianshan.,Bourque, Charles P. -A..,Jia, Xin.,Tian, Yun.,...&Wang, Ning.(2022).Temporal heterogeneity in photosystem II photochemistry in Artemisia ordosica under a fluctuating desert environment.FRONTIERS IN PLANT SCIENCE,13.
MLA	Jin, Chuan,et al."Temporal heterogeneity in photosystem II photochemistry in Artemisia ordosica under a fluctuating desert environment".FRONTIERS IN PLANT SCIENCE 13(2022).