气候变化领域集成服务门户(CCPortal): Vertical and leaf-age-related variations of nonstructural carbohydrates in two alpine timberline species, southeastern Tibetan Plateau

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DOI	10.1007/s10310-009-0132-x
	Vertical and leaf-age-related variations of nonstructural carbohydrates in two alpine timberline species, southeastern Tibetan Plateau
	Li, Ming-cai; Kong, Gao-qiang; Zhu, Jiao-jun
通讯作者	Li, MC (通讯作者)
发表日期	2009
ISSN	1341-6979
EISSN	1610-7403
起始页码	229
结束页码	235
卷号	14 期号:4
英文摘要	Spatial pattern of nonstructural carbohydrates (NSC) was analyzed in two alpine timberline species (Abies georgei and Juniperus saltuaria) growing at the timberline in Sergyemla Mountain, southeastern Tibetan Plateau. We aimed to examine the effect of canopy height and leaf age on balance between carbon uptake and consumption of timberline tree species in extremely environmental condition. The results showed that no significantly vertical variation in sugars, starch or NSC (soluble sugars plus starch) in A. georgei was found for any aged needles. Also, there were no significant differences among vertical gradients in both current and last-year leaves for J. saltuaria. However, different-aged needles/leaves showed significant differences in NSC concentrations in both A. georgei and J. saltuaria. For A. georgei, needle mean NSC across vertical canopies showed a significant increase from current-year to 2-year needles (P < 0.05), followed by a gradual decrease from 2- to 5-year needles (P < 0.05), whereas for J. saltuaria, last-year leaves had significant higher NSC except sugars compared with current-year leaves across canopies (P < 0.01). The observed trends of NSC along vertical canopy heights and leaf ages suggested that, in extreme environmental condition, not only light-induced carbon acquisition in photosynthesis but also carbohydrate export from leaves should be taken into account to explain the spatial pattern of NSC.
关键词	INTERNAL DIFFUSION CONDUCTANCE SINK LIMITATION CO2 ENRICHMENT SPRUCE NEEDLES USE EFFICIENCY SHADE LEAVES FOREST TREE CARBON GROWTH EVERGREEN
英文关键词	Alpine timberline; Canopy height; Carbon balance; Leaf age; Nonstructural carbohydrates
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:000268102800005
来源期刊	JOURNAL OF FOREST RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257623
推荐引用方式 GB/T 7714	Li, Ming-cai,Kong, Gao-qiang,Zhu, Jiao-jun. Vertical and leaf-age-related variations of nonstructural carbohydrates in two alpine timberline species, southeastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2009,14(4).
APA	Li, Ming-cai,Kong, Gao-qiang,&Zhu, Jiao-jun.(2009).Vertical and leaf-age-related variations of nonstructural carbohydrates in two alpine timberline species, southeastern Tibetan Plateau.JOURNAL OF FOREST RESEARCH,14(4).
MLA	Li, Ming-cai,et al."Vertical and leaf-age-related variations of nonstructural carbohydrates in two alpine timberline species, southeastern Tibetan Plateau".JOURNAL OF FOREST RESEARCH 14.4(2009).