Significance of mesophyll conductance for photosynthetic capacity and water-use efficiency in response to alkaline stress in Populus cathayana seedlings

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 > 山地表生过程与生态调控重点实验室

	Significance of mesophyll conductance for photosynthetic capacity and water-use efficiency in response to alkaline stress in Populus cathayana seedlings
	Xu, G.1,3; Huang, T. F.1; Zhang, X. L.2; Duan, B. L.2
刊名	PHOTOSYNTHETICA
	2013-09-01
卷号	51 期号:3 页码:438-444
关键词	carbon isotope discrimination chloroplast CO2 concentration curve-fitting method gas exchange intercellular CO2 concentration leaf nitrogen specific leaf area stomatal conductance
ISSN号	0300-3604
通讯作者	Duan, BL
合作状况	国内
英文摘要	Cuttings of Populus cathayana were exposed to three different alkaline regimes (0, 75, and 150 mM Na2CO3) in a semicontrolled environment. The net photosynthesis rate (P (N)), mesophyll conductance (g (m)), the relative limitations posed by stomatal conductance (L (s)) and by mesophyll conductance (L (m)), photosynthetic nitrogen-use efficiency (PNUE), carbon isotope composition (delta C-13), as well as specific leaf area (SLA) were measured. P (N) decreased due to alkaline stress by an average of 25% and g (m) decreased by an average of 57%. Alkaline stress caused an increase of L (m) but not L (s), with average L (s) of 26%, and L (m) average of 38% under stress conditions. Our results suggested reduced assimilation rate under alkaline stress through decreased mesophyll conductance in P. cathayana. Moreover, alkaline stress increased significantly delta C-13 and it drew down CO2 concentration from the substomatal cavities to the sites of carboxylation (C (i)-C (c)), but decreased PNUE. Furthermore, a relationship was found between PNUE and C (i)-C (c). Meanwhile, no correlation was found between delta C-13 and C (i)/C (a), but a strong correlation was proved between delta C-13 and C (c)/C (a), indicating that mesophyll conductance was also influencing the C-13/C-12 ratio of leaf under alkaline stress.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Plant Sciences
研究领域[WOS]	Plant Sciences
关键词[WOS]	CARBON-ISOTOPE DISCRIMINATION ; CO2 TRANSFER CONDUCTANCE ; INTERNAL CONDUCTANCE ; ASSIMILATION RATE ; LEAVES ; SENSITIVITY ; LIMITATION ; SALINITY ; PLANTS ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000321849900014
公开日期	2013-12-01
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6560]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Xu, G.,Huang, T. F.,Zhang, X. L.,et al. Significance of mesophyll conductance for photosynthetic capacity and water-use efficiency in response to alkaline stress in Populus cathayana seedlings[J]. PHOTOSYNTHETICA,2013,51(3):438-444.
APA	Xu, G.,Huang, T. F.,Zhang, X. L.,&Duan, B. L..(2013).Significance of mesophyll conductance for photosynthetic capacity and water-use efficiency in response to alkaline stress in Populus cathayana seedlings.PHOTOSYNTHETICA,51(3),438-444.
MLA	Xu, G.,et al."Significance of mesophyll conductance for photosynthetic capacity and water-use efficiency in response to alkaline stress in Populus cathayana seedlings".PHOTOSYNTHETICA 51.3(2013):438-444.