DOI: 10.3389/fpls.2019.01804
论文题名: Effects of Warming and N Deposition on the Physiological Performances of Leymus secalinus in Alpine Meadow of Qinghai-Tibetan Plateau
作者: Shen H. ; Dong S. ; Li S. ; Wang W. ; Xiao J. ; Yang M. ; Zhang J. ; Gao X. ; Xu Y. ; Zhi Y. ; Liu S. ; Dong Q. ; Zhou H. ; Yeomans J.C.
刊名: Frontiers in Plant Science
ISSN: 1664462X
出版年: 2020
卷: 10 语种: 英语
英文关键词: antioxidant enzymes
; Leymus secalinus
; photosynthesis
; Qinghai-Tibetan plateau
; stomatal conductance
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 (Anet), stomatal conductance (gs), intercellular CO2 concentration (Ci), and transpiration rate (Tr), while N deposition and warming plus N deposition significantly increased those parameters of L. secalinus. Warming significantly increased the VPD and Ls, 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, ΦPSII, qP, and decreased NPQ, while warming significantly decreased the Fv/Fm, ΦPSII, qP, and increased NPQ. N deposition strengthened the relations between gs, Chl, Chla, Chlb, Rubisco activity, and Anet. Under warming, only gs showed a significantly positive relation with Anet. 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. © Copyright © 2020 Shen, Dong, Li, Wang, Xiao, Yang, Zhang, Gao, Xu, Zhi, Liu, Dong, Zhou and Yeomans. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159215
Appears in Collections: 气候变化与战略
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作者单位: School of Environment, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Normal University, Beijing, China; School of Life and Geographic Sciences, Qinghai Normal University, Xining, China; Qinghai Academy of Animal Husbandry and Veterinary Science, Qinghai University, Xining, China; Northwest Institute of Plateau Biology, Key Laboratory of Restoration Ecology of Cold Are in Qinghai Province, Chinese Academy of Science, Xining, China; Research Department, Earth University, San José, Costa Rica
Recommended Citation:
Shen H.,Dong S.,Li S.,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,2020-01-01,10