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	Effects of water stress and nitrogen supply on leaf gas exchange and fluorescence parameters of sophora davidii seedlings
	Wu, F. Z.1,2; Bao, W. K.1; Li, F. L.1,2; Wu, N.1
刊名	Photosynthetica
	2008-03-01
卷号	46期号:1页码:40-48
关键词	Adaptation Chlorophyll fluorescence Intercellular co2 concentration Leaf area Net photosynthetic rate Respiration rate Specific leaf area Stomatal conductance Water use efficiency
ISSN号	0300-3604
DOI	10.1007/s11099-008-0008-x
通讯作者	Bao, w. k.(baowk@cib.ac.cn)
英文摘要	Two-month-old seedlings of sophora davidii were subjected to a randomized complete block design with three water (80, 40, and 20 % of water field capacity, i.e. fc80, fc40, and fc20) and three n supply [n0: 0, nl: 92 and nh: 184 mg(n) kg(-1)(soil)] regimes. water stress produced decreased leaf area (la) and photosynthetic pigment contents, inhibited photosynthetic efficiency, and induced photodamage in photosystem 2 (ps2), but increased specific leaf area (sla). the decreased net photosynthetic rate (p (n)) under medium water stress (fc40) compared to control (fc80) might result from stomatal limitations, but the decreased p (n) under severe water deficit (fc20) might be attributed to non-stomatal limitations. on the other hand, n supply could improve photosynthetic capacity by increasing la and photosynthetic pigment contents, and enhancing photosynthetic efficiency under water deficit. moreover, n supply did a little in alleviating photodamages to ps2 caused by water stress. hence water stress was the primary limitation in photosynthetic processes of s. davidii seedlings, while the photosynthetic characters of seedlings exhibited positive responses to n supply. appropriate n supply is recommended to improve photosynthetic efficiency and alleviate photodamage under water stress.
WOS关键词	CHLOROPHYLL FLUORESCENCE ; DROUGHT STRESS ; USE EFFICIENCY ; STOMATAL CONDUCTANCE ; ISOTOPE COMPOSITION ; STABLE CARBON ; ELEVATED CO2 ; PHOTOSYNTHESIS ; LIMITATIONS ; NUTRITION
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000253976500008
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2387498
专题	中国科学院大学
通讯作者	Bao, W. K.
作者单位	1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Wu, F. Z.,Bao, W. K.,Li, F. L.,et al. Effects of water stress and nitrogen supply on leaf gas exchange and fluorescence parameters of sophora davidii seedlings[J]. Photosynthetica,2008,46(1):40-48.
APA	Wu, F. Z.,Bao, W. K.,Li, F. L.,&Wu, N..(2008).Effects of water stress and nitrogen supply on leaf gas exchange and fluorescence parameters of sophora davidii seedlings.Photosynthetica,46(1),40-48.
MLA	Wu, F. Z.,et al."Effects of water stress and nitrogen supply on leaf gas exchange and fluorescence parameters of sophora davidii seedlings".Photosynthetica 46.1(2008):40-48.

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