| 生物土壤与生态 |
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| Response of Photosynthesis Function and Trehalose Content of Four Desert Plants to Gradual Drought Stress |
SONG Wei-min1,2, ZHOU Hai-yan1, JIA Rong-liang1, ZHAO Xin1, FENG Li1,2, TAN Hui-juan1
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| 1.Shapotou Desert Research ＆ Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;2.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China |
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Abstract The responses of net photosynthetic rate(Pn), chlorophyII fluorescence parameters and trehalose content of Reaumuria soongorica Maxim, Salsola passerina Bge, Caragana korshinskii Kom and Artemisia ordosica Krasch, to drought stress were studied. The results were as follows: Relative water content of leaves, net photosynthetic rate, maximal photochemical efficiency of PSⅡ in the dark(Fv/Fm), apparent quantum transport rate(ETR), photochemical quenching(qP) decreased, trehalose content and non photochemical quenching(qN) increased under drought stress. The effects of drought stress on those variables among the four desert plants were obviously different, and Caragana korshinskii Kom was the highest tolerance and resistant to drought stress among the four plants studied. Correlation between soil water content, trehalose content, net photosynthetic rate and chlorophyII fluorescence parameters was analyzed. The results indicated that soil water content remarkably affected photosynthesis and trehalose content of four desert plants.
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Received: 27 August 2007
Published: 20 May 2008
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2008, Vol. 28 
