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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (5): 1363-1370    DOI: 10.7522/j.issn.1000-694X.2013.00200
Biology and Soil     
Comparison on the Fluorescence Parameters of 21 Leguminosae Pasture Species in the Cele Oasis
LI Lei1,2,3, LI Xiang-yi1,3, XU Xin-wen1, LIN Li-sha1,3, ZENG Fan-jiang1,3, CHEN Feng-li1,2
1.State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Cele National Station of Observation and Research For Desert-grass Land Ecosystem in Xinjiang, Cele 848300, Xinjiang, China
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Abstract  

The Cele Oasis is located in the southern fringe of the Taklimakan desert, characterized by harsh environmental conditions such as strong radiation, high temperature, drought, and low soil fertility. To evaluate the adaptability of commonly cultivated pasture species to the local environment, 21 species of Leguminosae, growing at the edge of the Cele oasis were studied and were compared on the fluorescence parameters of their photosystem Ⅱ (PS Ⅱ). For the 21 Leguminosae pasture species, fast photosystem Ⅱ (PS Ⅱ) chlorophyll fluorescence kinetics were monitored after adaptation in darkness for 20 min and analysed with cluster analysis. The measured physiological parameters differed greatly in all the Leguminosae pasture in the Cele Oasis, and it can be split into four groups. The results showed obviously that the first group had the highest miximum fluorescence yield (Fo), absorption flux per reaction center (ABC/RC), maximal trapping flux per reaction center (TRo/RC), flux of dissipated excitation energy per reaction center (DIo/RC) and lowest maximum fluorescence yield (Fm), potential activity of PSⅡ (Fv/Fo), maximum photochemical efficiency of PSⅡ (Fv/Fm), active reaction centers per cross-section (RC/CSo), electron transport flux per reaction center(ETo/RC), initial slope of fluorescence intensity (Mo), on the contrary, the fourth group had the lowest Fo, ABC/RC, TRo/RC, DIo/RC and highest Fm, Fv/Fo, Fv/Fm, RC/CSo, ETo/RC, Mo. The second group and third group had mediate parameters. These parameters also showed large difference in variation amplitude. The results suggested that all the pasture species were suffered from the environmental conditions of the Cele Oasis to some extent, as indicated by inactivation of PSⅡ reaction center and depression of electron transport chain. The PSⅡ of first, second, third and fourth group is limited more and more significantly.

Key words:  chlorophyll fluorescence      cluster analysis      Leguminosae pasture      Cele Oasis     
Received:  21 June 2012      Published:  26 July 2012
ZTFLH:  Q945.79  

Cite this article: 

LI Lei1,2,3, LI Xiang-yi1,3, XU Xin-wen1, LIN Li-sha1,3, ZENG Fan-jiang1,3, CHEN Feng-li1,2. Comparison on the Fluorescence Parameters of 21 Leguminosae Pasture Species in the Cele Oasis. JOURNAL OF DESERT RESEARCH, 2013, 33(5): 1363-1370.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00200     OR     http://www.desert.ac.cn/EN/Y2013/V33/I5/1363

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