Effects of Warming and N Deposition on the Physiological Performances of Leymus secalinus in Alpine Meadow of Qinghai-Tibetan Plateau

	Effects of Warming and N Deposition on the Physiological Performances of Leymus secalinus in Alpine Meadow of Qinghai-Tibetan Plateau
	Shen, Hao; Dong, Shikui; Li, Shuai; Wang, Wenying; Xiao, Jiannan; Yang, Mingyue; Zhang, Jing; Gao, Xiaoxia; Xu, Yudan; Zhi, Yangliu
刊名	FRONTIERS IN PLANT SCIENCE
	2020
卷号	10
关键词	Qinghai-Tibetan plateau stomatal conductance antioxidant enzymes photosynthesis Leymus secalinus
英文摘要	Warming and Nitrogen (N) deposition are key global changes that may affect eco-physiological process of territorial plants. In this paper, we examined the effects of warming, N deposition, and their combination effect on the physiological performances of Leymus secalinus. Four treatments were established in an alpine meadow of Qinghai-Tibetan plateau: control (CK), warming (W), N deposition (N), and warming plus N deposition (NW). Warming significantly decreased the photosynthetic rate (A(net) ), stomatal conductance (g(s) ), intercellular CO2 concentration (C-i ), and transpiration rate (T-r ), while N deposition and warming plus N deposition significantly increased those parameters of L. secalinus. Warming significantly increased the VPD and L-s , while N deposition and warming plus N deposition had a significant positive effect. Warming negatively reduced the leaf N content, Chla, Chlb, and total Chl content, while N deposition significantly promoted these traits. Warming, N deposition, and their combination significantly increased the activity of SOD, POD, and CAT. Besides, warming and warming plus N deposition significantly increased the MDA content, while N deposition significantly decreased the MDA content. N deposition and warming plus N deposition significantly increased the Rubisco activity, while warming showed no significant effect on Rubisco activity. N deposition and warming plus N deposition significantly increased the Fv/Fm, phi PSII, qP, and decreased NPQ, while warming significantly decreased the Fv/Fm, phi PSII, qP, and increased NPQ. N deposition strengthened the relations between g(s) , Chl, Chla, Chlb, Rubisco activity, and A(net) . Under warming, only g(s) showed a significantly positive relation with A(net) . Our findings suggested that warming could impair the photosynthetic potential of L. secalinus enhanced by N deposition. Additionally, the combination of warming and N deposition still tend to lead positive effects on L. secalinus.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/60405]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Shen, Hao,Dong, Shikui,Li, Shuai,et al. Effects of Warming and N Deposition on the Physiological Performances of Leymus secalinus in Alpine Meadow of Qinghai-Tibetan Plateau[J]. FRONTIERS IN PLANT SCIENCE,2020,10.
APA	Shen, Hao.,Dong, Shikui.,Li, Shuai.,Wang, Wenying.,Xiao, Jiannan.,...&Yeomans, Jane C..(2020).Effects of Warming and N Deposition on the Physiological Performances of Leymus secalinus in Alpine Meadow of Qinghai-Tibetan Plateau.FRONTIERS IN PLANT SCIENCE,10.
MLA	Shen, Hao,et al."Effects of Warming and N Deposition on the Physiological Performances of Leymus secalinus in Alpine Meadow of Qinghai-Tibetan Plateau".FRONTIERS IN PLANT SCIENCE 10(2020).