气候变化领域集成服务门户(CCPortal): Ecophysiological traits of seedlings from different accessions of Stipa tenacissima along a climatic gradient

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DOI	10.1080/11263504.2024.2320130
	Ecophysiological traits of seedlings from different accessions of Stipa tenacissima along a climatic gradient
	Krichen, Khouloud; Vilagrosa, Alberto; Ben Mariem, Houcine; Chaieb, Mohamed
发表日期	2024
ISSN	1126-3504
EISSN	1724-5575
起始页码	158
结束页码	3
卷号	158 期号:3
英文摘要	Predicting the future impact of climate change on Stipa tenacissima steppes is of paramount importance to prevent desertification. From this perspective, we selected seven populations, covering a rainfall range from 100 to 600 mm/year at the sites of seed collection, and we grew the seedlings at the same site. Gas exchange measurements of CO2, light response curves, chlorophyll content and isotopic analysis were investigated. Thala and Valencia populations displayed a contrasted gas exchange response. Both populations were subjected to A-Ci curve analysis. No significant difference was detected between these two different populations in the maximum rate of carboxylation (V-cmax) and the maximum rate of electron transport (J(max)). Stipa tenacissima exhibited a variable response in relation to different light intensities. Photosynthesis and chlorophyll fluorescence parameters proved to be significantly different among populations in response to light intensities. All populations exhibited similar chlorophyll content. The isotopic analysis highlighted a different carbon and nitrogen isotopic composition (delta C-13 and delta N-15) and carbon content (c) among populations. Mesic populations presented a higher gas exchange activity and light response. The xeric populations performed a photosynthesis adjustment along with minimizing chlorophyll content. Under climate change, S. tenacissima limits productivity, which may lead to desertification.
英文关键词	Stipa tenacissima; climate change; light curve; a/ci curve; isotopic composition; chlorophyll fluorescence
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001181423300001
来源期刊	PLANT BIOSYSTEMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/309556
作者单位	Universite de Sfax; Faculty of Sciences Sfax; Universitat d'Alacant; Universite de Sfax; Faculty of Sciences Sfax
推荐引用方式 GB/T 7714	Krichen, Khouloud,Vilagrosa, Alberto,Ben Mariem, Houcine,et al. Ecophysiological traits of seedlings from different accessions of Stipa tenacissima along a climatic gradient[J],2024,158(3).
APA	Krichen, Khouloud,Vilagrosa, Alberto,Ben Mariem, Houcine,&Chaieb, Mohamed.(2024).Ecophysiological traits of seedlings from different accessions of Stipa tenacissima along a climatic gradient.PLANT BIOSYSTEMS,158(3).
MLA	Krichen, Khouloud,et al."Ecophysiological traits of seedlings from different accessions of Stipa tenacissima along a climatic gradient".PLANT BIOSYSTEMS 158.3(2024).