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KMID : 0368419870300040249
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Journal of Plant Biology
1987 Volume.30 No. 4 p.249 ~ p.255
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Cell Biological Studies on Growth and Development
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Lee, Sun Hi/李舜熙
Kang, Young Hee/Jin, Eon Seon/Cho, Young Dong/Kim, Myeong Won/Lee, June Seung/康榮熹/陳彦先/趙暎東/金明苑/李埈承
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Abstract
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The effect of polyamine and Ca^2+ on D-glucose-6-phosphate cyclohydrolase activity was studied in Daucus carota root. The enzyme activity was reduced in response to increase in concentration of Ca^2+, not the Ca^2+-calmodulin complex. The inhibition effect due to Ca^2+ was reversed by polyamine, especially remarkable at low concentration of Ca^2+. The effect of the Ca^2+ on the enzyme seemed to compete wth polyamine according to the Lineweaver-Burk plot. The enzyme activity from carrot root protoplast cultured in the prescence of verapamil was higher than that of the control. Such cumulative results suggest that the inhibition by the Ca^2+ and enhancement or reversal by polyamine could regulate the biosynthesis of pectin and hemicellulose to some extent.
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KEYWORD
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