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	Photosynthetic regulation of C-4 desert plant Haloxylon ammodendron under drought stress
	Su, Peixi; Cheng, Guodong; Yan, Qiaodi; Liu, Xinmin
刊名	PLANT GROWTH REGULATION
	2007-02-01
卷号	51期号:2页码:139-147
关键词	desert plant photoinhibition photosynthesis down regulation photochemical efficiency drought stress
ISSN号	0167-6903
DOI	10.1007/s10725-006-9156-9
通讯作者	Su, Peixi(supx@lzb.ac.cn)
英文摘要	About 20-year-old desert plants of C-4 species, Haloxylon ammodendron, growing at the southern edge of the Badain Jaran Desert in China, were selected to study the photosynthetic characteristics and changes in chlorophyll fluorescence when plants were subject to a normal arid environment (AE), moist atmospheric conditions during post-rain (PR), and the artificial supplement of soil water (SW). Results showed that under high radiation, in the AE, the species down-regulated its net assimilation rate (A) and maximum photochemical efficiency of PS II (Fv/Fm), indicating photoinhibition. However, under the PR and SW environments, A was up-regulated, with a unimodal diurnal course of A and a small diurnal change in Fv/Fm, suggesting no photoinhibition. When the air humidity or SW content was increased, the light compensation points were reduced; light saturation points were enhanced; while light saturated rate of CO2 assimilation (A(max)) and apparent quantum yield of CO2 assimilation (Phi(C)) increased. Phi(C) was higher while the A(max) was reduced under PR relative to the SW treatment. It was concluded that under high-radiation conditions drought stress causes photoinhibition of H. ammodendron. Increasing air humidity or soil moisture content can reduce photoinhibition and increase the efficiency of solar energy use.
收录类别	SCI
WOS关键词	CHLOROPHYLL FLUORESCENCE ; CO2 ASSIMILATION ; GAS-EXCHANGE ; PHOTOINHIBITION ; PHOTOPROTECTION ; LIGHT ; PHOTORESPIRATION ; TEMPERATURE ; EFFICIENCY ; LEAVES
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:000244317000005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556011
专题	寒区旱区环境与工程研究所
通讯作者	Su, Peixi
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Linze Inland River Basin Comprehens Res Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Su, Peixi,Cheng, Guodong,Yan, Qiaodi,et al. Photosynthetic regulation of C-4 desert plant Haloxylon ammodendron under drought stress[J]. PLANT GROWTH REGULATION,2007,51(2):139-147.
APA	Su, Peixi,Cheng, Guodong,Yan, Qiaodi,&Liu, Xinmin.(2007).Photosynthetic regulation of C-4 desert plant Haloxylon ammodendron under drought stress.PLANT GROWTH REGULATION,51(2),139-147.
MLA	Su, Peixi,et al."Photosynthetic regulation of C-4 desert plant Haloxylon ammodendron under drought stress".PLANT GROWTH REGULATION 51.2(2007):139-147.

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