EFFECTS OF SALINITY STRESS ON THE PHOTOSYNTHESIS OF Wolffia arrhiza AS PROBED BY THE OJIP TEST

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	EFFECTS OF SALINITY STRESS ON THE PHOTOSYNTHESIS OF Wolffia arrhiza AS PROBED BY THE OJIP TEST
	Wang, Gaohong 1; Chen, Lanzhou 2; Hao, Zongjie 1,3; Li, Xiaoyan 1; Liu, Yongding 1
刊名	FRESENIUS ENVIRONMENTAL BULLETIN
	2011
卷号	20 期号:2A 页码:432-438
关键词	salinity photosynthesis chlorophyll a fluorescence Wolffia arrhiza
ISSN号	1018-4619
通讯作者	Liu, YD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China ; space@ihb.ac.cn
中文摘要	In the present study, we investigated the effects of salinity stress, one of the main stress in polluted water bodies, on the photosynthetic activity of Wolffia arrhiza. High salinity stress (1-4%) significantly decreased photosynthetic CO2 assimilation activity, while the chlorophyll a, chlorophyll b and carotenoid contents were not affected after treatment with salinity stress for 24 h. The fluorescence yields at phases J, I and P were clearly decreased by salinity stress above 1%, and the addition of DCMU to the control resulted in the transformation of an O-J-I-P ris e into an 04 rise. Salinity stress decreased the quantum yield of primary photochemistry (phi Po), the quantum yield of electron transport (phi Eo) and the efficiency per trapped excitation (Psi o) in Wolffia arrhiza simultaneously; the number of active PSII reaction centers per excited cross section (RC/CS), the total number of active reaction centers per absorption (RC/ABS) and the performance index of PSII (PIABS and PICS) were also reduced by salinity. These results indicated that the effects of salinity stress on the photosynthesis of Wolffia arrhiza may function by the inhibition electron transport and inactivation of the reaction centers, but the inhibition may occur in the electron transport pathway at the donor and acceptor sides of PSII in Wolffia arrhiza, which is different to that of salt-resistant plants.
英文摘要	In the present study, we investigated the effects of salinity stress, one of the main stress in polluted water bodies, on the photosynthetic activity of Wolffia arrhiza. High salinity stress (1-4%) significantly decreased photosynthetic CO(2) assimilation activity, while the chlorophyll a, chlorophyll b and carotenoid contents were not affected after treatment with salinity stress for 24 h. The fluorescence yields at phases J, I and P were clearly decreased by salinity stress above 1%, and the addition of DCMU to the control resulted in the transformation of an O-J-I-P ris e into an 04 rise. Salinity stress decreased the quantum yield of primary photochemistry (phi Po), the quantum yield of electron transport (phi Eo) and the efficiency per trapped excitation (Psi o) in Wolffia arrhiza simultaneously; the number of active PSII reaction centers per excited cross section (RC/CS), the total number of active reaction centers per absorption (RC/ABS) and the performance index of PSII (PI(ABS) and PI(CS)) were also reduced by salinity. These results indicated that the effects of salinity stress on the photosynthesis of Wolffia arrhiza may function by the inhibition electron transport and inactivation of the reaction centers, but the inhibition may occur in the electron transport pathway at the donor and acceptor sides of PSII in Wolffia arrhiza, which is different to that of salt-resistant plants.
学科主题	Environmental Sciences
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	CHLOROPHYLL FLUORESCENCE ; SPIRODELA-POLYRHIZA ; PIGMENT COMPOSITION ; PHOTOSYSTEM-II ; SALT STRESS ; PLANTS ; TRANSIENT ; LEVEL ; PSII
收录类别	SCI
资助信息	Chinese Natural Science Foundation [30400093, 30970688, 30970446]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07105-005, 2009ZX07104-005-02]; Project of Chinese Manned Spaceflight
语种	英语
WOS记录号	WOS:000289040400003
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/15652]
专题	水生生物研究所_水环境工程研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Wuhan Univ, Coll Resource & Environm Sci, Wuhan 430070, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Wang, Gaohong,Chen, Lanzhou,Hao, Zongjie,et al. EFFECTS OF SALINITY STRESS ON THE PHOTOSYNTHESIS OF Wolffia arrhiza AS PROBED BY THE OJIP TEST[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2011,20(2A):432-438.
APA	Wang, Gaohong,Chen, Lanzhou,Hao, Zongjie,Li, Xiaoyan,&Liu, Yongding.(2011).EFFECTS OF SALINITY STRESS ON THE PHOTOSYNTHESIS OF Wolffia arrhiza AS PROBED BY THE OJIP TEST.FRESENIUS ENVIRONMENTAL BULLETIN,20(2A),432-438.
MLA	Wang, Gaohong,et al."EFFECTS OF SALINITY STRESS ON THE PHOTOSYNTHESIS OF Wolffia arrhiza AS PROBED BY THE OJIP TEST".FRESENIUS ENVIRONMENTAL BULLETIN 20.2A(2011):432-438.