Reduced stomatal frequency with rising elevation for Kobresia royleana on the Tibetan Plateau

doi:10.1016/j.gecco.2020.e01326

CORC > 植物研究所 > 中国科学院植物研究所 > 系统与进化植物学国家重点实验室

	Reduced stomatal frequency with rising elevation for Kobresia royleana on the Tibetan Plateau
	Zhang, Lin 3; Zhang, Shuren 1; Li, Qijia 4; Quan, Cheng 4
刊名	GLOBAL ECOLOGY AND CONSERVATION
	2020
卷号	24
关键词	C-3 sedge Stomatal density Low temperature Specific leaf area Leaf carbon discrimination
DOI	10.1016/j.gecco.2020.e01326
文献子类	Article
英文摘要	Knowledge about within-species variation in stomatal frequency with varying elevation at very high elevations is rare, which is crucial for us to understand how alpine plants are adapted to the extreme environment. Here, we focus on the variation in stomatal frequency in Kobresia royleana (Nees) Boeckeler (Cyperaceae, Cyperales) along two altitudinal transects (elevation ranges from 3723 m to 5081 m) in the center of the Tibetan Plateau. The result shows the stomatal density (SD) varied from 303 +/- 55.6 mm(-2) to 542 +/- 81.8 mm(-2), and stomatal index (SI) ranged from 21.0% to 29.6%. In contrast with most cases, an unexpected negative response of stomatal frequency to rising elevation was observed. Among abiotic factors, the growing season mean temperature and CO2 partial pressure significantly declined with increasing elevation, while the growing season precipitation did not vary. Therefore, the decreasing SD and SI were mainly due to the declining temperature rather than the decreasing CO2 partial pressure. Further, SD and SI were negatively related to leaf functional traits of specific leaf area (SLA), leaf nitrogen concentration (N) and stable carbon isotope ratios (delta C-13), and all these morphological and physiological traits tended to covary with rising elevation and declining temperature. Meanwhile, the increasing delta C-13, N and SLA with elevation seem to be strategies for alpine plants to cope with the low-temperature environments. Therefore, the observed covariance between stomatal frequency and leaf functional traits also suggests that the low temperature rather than low CO2 partial pressure mainly leads to the elevational pattern of stomatal frequency for this alpine species. (C) 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
学科主题	Biodiversity Conservation ; Ecology
电子版国际标准刊号	2351-9894
出版地	AMSTERDAM
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; WATER-USE EFFICIENCY ; UV-B RADIATION ; LEAF MORPHOLOGY ; ALTITUDINAL VARIATION ; CLIMATE-CHANGE ; FOSSIL LEAVES ; DENSITY ; CO2 ; TRAITS
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000608479300016
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41820104002, 41772009, 42002022] ; S&T Basic Work of Sciences and Technology [2015FY11030001-5] ; Fundamental Research Funds for the Central Universities, CHD [300102270301]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/21472]
专题	系统与进化植物学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Key Lab Alpine Ecol, Beijing 100101, Peoples R China 2.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China 3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lin,Zhang, Shuren,Li, Qijia,et al. Reduced stomatal frequency with rising elevation for Kobresia royleana on the Tibetan Plateau[J]. GLOBAL ECOLOGY AND CONSERVATION,2020,24.
APA	Zhang, Lin,Zhang, Shuren,Li, Qijia,&Quan, Cheng.(2020).Reduced stomatal frequency with rising elevation for Kobresia royleana on the Tibetan Plateau.GLOBAL ECOLOGY AND CONSERVATION,24.
MLA	Zhang, Lin,et al."Reduced stomatal frequency with rising elevation for Kobresia royleana on the Tibetan Plateau".GLOBAL ECOLOGY AND CONSERVATION 24(2020).