| Biology and Soil |
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| Effects of Exogenous Salicylic Acid on Cell Membrane and Chlorophyll Fluorescence Characteristics in Leaves of Tobacco Seedlings under Drought Stress |
| ZHANG Hui-hui, JIN Wei-wei, MAO Wei-jia, SUN Guang-yu |
| College of Life Science, Northeast Forest University, Harbin 150040, China |
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Abstract Taking tobacco "Longjiang 911" grown in pots as test material, we studied effects of salicylic acid spraying on chlorophyll content, chlorophyll fluorescence characteristic and cell membrane injury in leaves of the tobacco under drought stress. Results showed that the membrane system of tobacco leaves was damaged and the primary reaction of photosynthesis and distribution of absorbed light energy changed under drought stress. Spraying 0.5 mmol·L-1 or 1.0 mmol·L-1 salicylic acid on leaves of the tobacco has reduced the content of MDA in leaves of tobacco, and could effectively protect the membrane system under drought stress. Meanwhile, 0.5 mmol·L-1 or 1.0 mmol·L-1 salicylic acid spraying could decrease the decomposition of chlorophyll to alleviate the damage to thylakoid membranes and PSⅡ reaction center under drought stress, and improve greatly its drought-resistance. In experiment, 0.5~1.0 mmol·L-1 was the optimal concentration of salicylic acid spraying on leaves of tobacco under drought stress, but 2.0 mmol·L-1 salicylic acid spraying would be toxic to the tobacco seedlings.
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Received: 13 April 2011
Published: 20 January 2012
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Cite this article:
ZHANG Hui-hui, JIN Wei-wei, MAO Wei-jia, SUN Guang-yu. Effects of Exogenous Salicylic Acid on Cell Membrane and Chlorophyll Fluorescence Characteristics in Leaves of Tobacco Seedlings under Drought Stress. JOURNAL OF DESERT RESEARCH, 2012, 32(1): 117-121.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2012/V32/I1/117
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2012, Vol. 32 
