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Function of cAMP as a Mat-Forming Factor in the Cyanobacterium Spirulina platensis |
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| Authors: | Ohmori Kazuko; Hirose Masaki; Ohmori Masayuki |
| Institution: | 1Faculty of Life Sciences, Showa Women's University Taishido 1-7, Setagaya, Tokyo, 154 Japan 2Faculty of Education, Wakayama University Sakaedani 930, Wakayama-shi, 640 Japan 3Ocean Research Institute, University of Tokyo Nakano-ku, Tokyo, 164 Japan |
| Abstract: | A dense suspension of Spirulina platensis trichomes aggregatedrapidly and formed a diskshaped algal mat when cAMP was added.Cyclic AMP significantly stimulated algal mat formation at concentrationsas low as 10–7 M. Stimulation of the mat formation wasmost rapid at about 10–5M cAMP, but higher concentrationswere not increasingly effective. Other nucleotides such as cGMP,ATP and AMP showed no stimulatory effect on algal mat formation.CCCP, an inhibitor of ATP synthesis, was found to suppress thecAMP-stimulated algal mat formation. Cyclic AMP also stimulatedrespiration and gliding movement of this cyanobacterium. (Received September 2, 1991; Accepted October 15, 1991) |
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