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KMID : 0368420040470020105
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Journal of Plant Biology
2004 Volume.47 No. 2 p.105 ~ p.110
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Effect of low doses of UV-A and UV-B radiation on photosynthetic activities inPhaseolus mungo L.
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Jayakumar Muthukrishnan
Amudha Paulraj
Kulandaivelu Govindaswamy
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Abstract
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The effect of low doses of UV-A (320?400 nm) and UV-B (280?320 nm) radiation on photosynthetic activities inPhaseolus mungo L. was investigated under field condition. Supplementation of UV-A enhanced the synthesis of chlorophyll and carotenoids than the UV-B supplemented plants. Significant increase was seen in the concentration of UV-B absorbing compounds of UV-B treated plants. Increase of PS 2 activity in UV-A treated plants was seen. Changes in photosynthetic activity were measured in terms of PS 2 mediated O2 evolution and Chl a fluorescence.
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KEYWORD
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chlorophyll, fluorescence induction, Phaseolus mungo, ozone depletion, UV-A radiation, UV-B radiation
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