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Reduced stomatal frequency with rising elevation for Kobresia royleana on the Tibetan Plateau | |
Zhang, Lin1; Zhang, Shuren2; Li, Qijia3; Quan, Cheng3 | |
2020 | |
发表期刊 | GLOBAL ECOLOGY AND CONSERVATION |
卷号 | 24 |
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. |
关键词 | C-3 sedge Stomatal density Low temperature Specific leaf area Leaf carbon discrimination |
学科领域 | Biodiversity Conservation ; Ecology |
DOI | 10.1016/j.gecco.2020.e01326 |
收录类别 | SCI |
语种 | 英语 |
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 |
WOS记录号 | WOS:000608479300016 |
出版者 | ELSEVIER |
文献子类 | Article |
出版地 | AMSTERDAM |
EISSN | 2351-9894 |
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] |
作者邮箱 | qjli@chd.edu.cn |
作品OA属性 | gold |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | 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, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Key Lab Alpine Ecol, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China 4.Changan Univ, Sch Earth Sci & Resources, Xian 710054, 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). |
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