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KMID : 0613820050150030453
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Journal of Life Science
2005 Volume.15 No. 3 p.453 ~ p.460
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Cadmium Toxicity and Calcium Effect on Growth and Photosynthesis of Tobacco
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Roh Kwang-Soo
Jin Hiw-Seung
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Abstract
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This investigation was performed to study Cd toxicity and the influence of Ca on Cd toxicity in growth, and photosynthetic pigments and enzymes in tobacco. Cd inhibited both growth and level of chlorophyll, but the inhibition was compensated by the treatment of Ca. Especially, chlorophyll content was significantly increased by the combination of Cd and Ca treatment compared with Cd treatment alone. In addition, activity and content of rubisco by Cd treatment was also significantly lesser than the nontreated control. The highly reduced activity of rubisco was minimized by the combined treatment of Ca to Cd. Rubisco activase activity and content also showed a pattern of change similar to the rubisco level, suggesting that Cd- and Ca-induced changes of rubisco could be caused by rubisco activase.
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KEYWORD
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