Effects of Compounds that Influence Calcium Absorption and of Calcium-Calmodulin Inhibitors on Zeatin Induced Growth and Chlorophyll Synthesis in Excised Cucumber Cotyledons |
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| Authors: | Zhao, Zhifan Ross, Cleon W. |
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| Affiliation: | 1Institute of Crops Science, Chinese Academy of Agricultural Sciences Beijing, China
2Department of Biology and Department of Plant Pathology and Weed Science, Colorado State University Fort Collins, CO 80523, U.S.A. |
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| Abstract: | Previous results indicate that cytokinin action requires formationof Ca-calmodulin. We evaluated that hypothesis for cytokinin(zeatin) induced growth and chlorophyll formation in excisedcucumber (Cucumis sativus L.) cotyledons using several compoundsexpected to increase or decrease cytosolic levels of Ca2+ andthereby perturb formation of Ca-calmodulin. We also studiedeffects of eight drugs known to inhibit action of Ca-calmodulinin animals. Most of the results indicate no special requirementof Ca-calmodulin for cytokinin action in these organs. (Received November 24, 1988; Accepted April 24, 1989) |
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