Variations in leaf functional traits and physiological characteristics of Abies georgei var.smithii along the altitude gradientin the Southeastern Tibetan Plateau

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2016 > Vol13 NO.10

	Variations in leaf functional traits and physiological characteristics of Abies georgei var.smithii along the altitude gradientin the Southeastern Tibetan Plateau
	GUO Qi-qiang; LIHui-e; ZHANG Wen-hui
刊名	Journal of Mountain Science
	2016-10
卷号	13 期号:10 页码:1818-1828
关键词	Alpine plant Abies georgei Leaf functional traits Photosynthetic parameters Enzyme activity and malondialdehyde concentration
ISSN号	1672-6316
通讯作者	GUO Qi-qiang
英文摘要	Variations in leaf functional traits of Abies georgei var. smithii at 3700, 3900, 4100, 4300, and 4390 m altitude were investigated in 15 typical plots in the Southeastern Tibetan Plateau. In each plot, three seedlings were selected, of which functional leaves in current-year sunny branches were chosen for the measurement of morphological, photosynthetic, and physiological and biochemical characteristics, and their variations were analyzed. Results showed that significant variations existed among the leaf functional traits of A. georgei var. smithii along the altitudinal gradient, as well as their physiological adaption indicators. Leaf area decreased, while the mass per area and thickness of leaf increased at an altitude above 4,100 m. The maxima of pigment, total nitrogen concentration, net photosynthesis rate during light-saturated, and when water use efficiency appeared at 4100 m altitude. In addition, A. georgei var. smithii seedlings regulated the activities of superoxide dismutase and ascorbate peroxidase to resist abiotic stress under 4100 m altitude. Meanwhile, malondialdehyde concentration and the dark respiration rate rapidly increased, which indicates that A. georgei var. smithii seedlings suffered from heavy abiotic stress from 4100 m to 4390 m altitude. Basing on variations in leaf functional traitsalong the altitude gradient, we inferred that 4100 m altitude was the suitable region for A. georgei var. smithii growth in the Sygera Mountain. Moreover, the harsh environment was the main limiting factor for A. georgei var. smithii population expansion to high altitude.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17589]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 NO.10
推荐引用方式 GB/T 7714	GUO Qi-qiang,LIHui-e,ZHANG Wen-hui. Variations in leaf functional traits and physiological characteristics of Abies georgei var.smithii along the altitude gradientin the Southeastern Tibetan Plateau[J]. Journal of Mountain Science,2016,13(10):1818-1828.
APA	GUO Qi-qiang,LIHui-e,&ZHANG Wen-hui.(2016).Variations in leaf functional traits and physiological characteristics of Abies georgei var.smithii along the altitude gradientin the Southeastern Tibetan Plateau.Journal of Mountain Science,13(10),1818-1828.
MLA	GUO Qi-qiang,et al."Variations in leaf functional traits and physiological characteristics of Abies georgei var.smithii along the altitude gradientin the Southeastern Tibetan Plateau".Journal of Mountain Science 13.10(2016):1818-1828.