Arid
DOI10.1016/j.ecolind.2018.06.040
Photosynthetic gas-exchange and PSII photochemical acclimation to drought in a native and non-native xerophytic species (Artemisia ordosica and Salix psammophila)
Wu, Ya Juan1,2; Yun, Cai1,2; Tian, Yun2; Zha, Tian Shan1,2; Liu, Peng1,2; Bai, Yu Jie2; Ma, Jing Yong2; Lai, Zong Rui1,2; Bourque, Charles P-A1,3
通讯作者Zha, Tian Shan
来源期刊ECOLOGICAL INDICATORS
ISSN1470-160X
EISSN1872-7034
出版年2018
卷号94页码:130-138
英文摘要

The mechanisms of plant photosynthetic acclimation to drought remains incomplete. We examined the photosynthetic performance through plant photosystem-fluorescence response to a long-lasting, anomalous summer drought (i.e., lasting for 61 days, with soil water content < 0.1 m(3).rn(-3)) and subsequent post-drought recovery of a native and a non-native desert shrub species (Artemisia ordosica and Salix psammophila, respectively) growing in northwest China. Key indicators to the examination are derived estimates of plant stomatal conductance (g(s)), transpiration (T-r), water use efficiency (WUE), maximum and actual photochemical efficiency (F-v/F-m and Phi(PSII)), non-photochemical quenching (NPQ), and leaf photosynthesis (P-N) from simultaneous, continuous in situ measurements of gas exchange and chlorophyll fluorescence. Chlorophyll fluorescence-associated indicator "F-v/F-m" for both species was down regulated in response to deficits in soil water content (SWC), with differential SWC thresholds of 0.07 and 0.08 M-3.m(-3) for A. ordosica and S. psammophila, respectively. The results revealed that both species acclimate to summer drought by a stomatal-regulation mechanism of reducing g(s) and WUE and by a PSII NPQ mechanism of dissipating the excessive light energy, indicative of a water-conservation strategy in the acclimation to drought. In comparison with the non-native species, the native species generally had greater photosynthetic performance under water-deficit conditions demonstrating higher transpiration, net CO2 assimilation, and greater PSII photochemical efficiency. Lower WUE and greater drought resistance and resilience, combined with minor changes in PSII photochemical efficiency are consistent with a well-defined water-conservation response by A. ordosica. The results support the hypothesis that native desert-shrub species can potentially outperform non-native shrub species, due to stronger resistance and faster overall recovery from long-lasting drought. Therefore, with increased drought severity and duration anticipated with future climate change, the native shrub species is suggested to be used in desertification control and ecological restoration for sustainable ecosystem management.


英文关键词Chlorophyll fluorescence Drought response Photosynthetic acclimation Recovery rate Shrubs
类型Article
语种英语
国家Peoples R China ; Canada
收录类别SCI-E
WOS记录号WOS:000452692500014
WOS关键词WATER-USE EFFICIENCY ; CHLOROPHYLL FLUORESCENCE ; PHOTOSYSTEM-II ; XANTHOPHYLL CYCLE ; ELECTRON-TRANSPORT ; QUANTUM YIELD ; STRESS ; LIGHT ; SHRUB ; PLANT
WOS类目Biodiversity Conservation ; Environmental Sciences
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构北京林业大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/208749
作者单位1.Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing 100083, Peoples R China;
2.Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing 100083, Peoples R China;
3.Univ New Brunswick, Fac Forestry & Environm Management, 28 Dineen Dr,POB 4400, St John, NB E3B 5A3, Canada
推荐引用方式
GB/T 7714
Wu, Ya Juan,Yun, Cai,Tian, Yun,et al. Photosynthetic gas-exchange and PSII photochemical acclimation to drought in a native and non-native xerophytic species (Artemisia ordosica and Salix psammophila)[J]. 北京林业大学,2018,94:130-138.
APA Wu, Ya Juan.,Yun, Cai.,Tian, Yun.,Zha, Tian Shan.,Liu, Peng.,...&Bourque, Charles P-A.(2018).Photosynthetic gas-exchange and PSII photochemical acclimation to drought in a native and non-native xerophytic species (Artemisia ordosica and Salix psammophila).ECOLOGICAL INDICATORS,94,130-138.
MLA Wu, Ya Juan,et al."Photosynthetic gas-exchange and PSII photochemical acclimation to drought in a native and non-native xerophytic species (Artemisia ordosica and Salix psammophila)".ECOLOGICAL INDICATORS 94(2018):130-138.
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