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KMID : 0368419870300030173
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Journal of Plant Biology
1987 Volume.30 No. 3 p.173 ~ p.179
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Cell Biological Studies on Growth and Development
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李舜熙/Lee, Sun Hi
姜榮熹/表炳植/趙暎東/金明苑/李埈承/Kang, Young Hee/Pyo, Byoung Sik/Cho, Young Dong/Kim, Myeong Won/Lee, June Seung
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Abstract
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The effect of polyamine, Ca^2+ and calmodulin on GS(β-glucan synthetase) activity was studied in Daucus carota root. The Ca^2+ is shown to have no effect on the GS activity wherease the GS Ⅱ activity is increase in response to increase in concentration of the Ca^2+. When the protoplasts are cultured, for 4 days, the GS Ⅱ activity increases as a tunction of time and reaches a maximum after 3 dyays at a time when the network of cellulose microfibrils is known to be synthesized. The effect of the Ca^2+ and 1 mM spermine on the GS Ⅱ activity turns out to be synergistic, especially more synergistic at lower concentration of the Ca^2+. The GS Ⅱ activity seems to be enhanced by the Ca^2+. The GS Ⅱ activity in the protoplast treated by the calcium channel blocker, verapamil, turns out to be lower than that of the control.
Cumulative results suggest that the Ca^2+ stimulates the cell wall regeneration via enhancement of the GS Ⅱ activity responsible for synthesizing the cell wall component throught synergistic effect with spermine.
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