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	Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting picea asperata populations
	Duan, Baoli1; Li, Yan1,2; Zhang, Xiaolu1; Korpelainen, Helena3; Li, Chunyang1
刊名	Tree physiology
	2009-12-01
卷号	29期号:12页码:1551-1561
关键词	Carbon isotope discrimination Internal conductance Limitation analysis Photosynthesis Stomatal conductance
ISSN号	0829-318X
DOI	10.1093/treephys/tpp085
通讯作者	Li, chunyang(licy@cib.ac.cn)
英文摘要	The aim of this study was to examine the response of internal conductance to co(2) (g(i)) to soil water deficit and contrasting light conditions, and their consequences on photosynthetic physiology in two picea asperata mast. populations originating from wet and dry climate regions of china. four-year-old trees were subjected to two light treatments (30% and 100% of full sunlight) and two watering regimes (well watered, drought) for 2years. in both tested populations, drought significantly decreased g(i) and the net photosynthesis rate (a) and increased carbon isotope composition ((13)c) values in both light treatments, in particular in the sun. moreover, drought resulted in a significantly higher relative limitation due to stomatal conductance (l(s)) in both light treatments and higher relative limitation due to internal conductance (l(i)) and abscisic acid (aba) in the sun plants. the results also showed that l(i) (0.260.47) was always greater than l(s) (0.120.28). on the other hand, drought significantly decreased the ratio of chloroplastic to internal co(2) concentration (c(c)/c(i)), photosynthetic nitrogen utilization efficiency (pnue) and total biomass in the sun plants of the wet climate population, whereas there were no significant changes in these parameters in the dry climate population. our results also showed that the dry climate population possessed higher (13)c values with higher ratio of internal conductance to stomatal conductance (g(i)/g(s)), suggesting that increasing the g(i)/g(s) ratio enhances water-use efficiency (wue) in plants evolved in arid environments. thus, we propose that the use of the g(i)/g(s) parameter to screen p. asperata plants with higher water deficit tolerance is certainly worthy of consideration. furthermore, g(i) is an important variable, which reflects the population differences in pnue, and it should thus be included in plant physiological investigations related to leaf economics.
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; CO2 TRANSFER CONDUCTANCE ; INTERNAL CONDUCTANCE ; PHOTOSYNTHETIC CAPACITY ; STOMATAL CONDUCTANCE ; IN-VIVO ; LEAF ; DROUGHT ; PROVENANCES ; TEMPERATURE
WOS研究方向	Forestry
WOS类目	Forestry
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000271825500007
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2394554
专题	中国科学院大学
通讯作者	Li, Chunyang
作者单位	1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Univ Helsinki, Dept Appl Biol, FI-00014 Helsinki, Finland
推荐引用方式 GB/T 7714	Duan, Baoli,Li, Yan,Zhang, Xiaolu,et al. Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting picea asperata populations[J]. Tree physiology,2009,29(12):1551-1561.
APA	Duan, Baoli,Li, Yan,Zhang, Xiaolu,Korpelainen, Helena,&Li, Chunyang.(2009).Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting picea asperata populations.Tree physiology,29(12),1551-1561.
MLA	Duan, Baoli,et al."Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting picea asperata populations".Tree physiology 29.12(2009):1551-1561.

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