Changes in intracellular polyamine concentration during growth of Heterosigma akashiwo (Raphidophyceae) |
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| Authors: | Naoyoshi Nishibori Shinsuke Fujihara Toshitaka Nishijima |
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| Institution: | Shikoku University Junior College, Ojin, Tokushima 771-1192,;Laboratory of Plant Nutrition and Diagnosis, National Agricultural Research Center, Kannondai, Tsukuba 305-8666, and;Faculty of Agriculture, Kochi University, Monobe, Nankoku, Kochi 783-8502, Japan |
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| Abstract: | ABSTRACT: Of the free, conjugated and bound forms of polyamines, the free form of spermidine was the most abundant polyamine in Heterosigma akashiwo throughout the growth period except for the lag phase. Free spermidine content increased remarkably during the exponential growth phase and increased as the growth rate increased. The maximum growth yield of H. akashiwo was reduced by the addition of methylglyoxal bis-guanylhydrazone (MGBG) and the reduced growth yield could be counteracted by the addition of spermidine to the medium. It is concluded that spermidine plays a significant role in the growth of H. akashiwo . These results are similar to those obtained in Chattonella antiqua that belongs to same taxonomic Class as H. akashiwo . |
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| Keywords: | growth Heterosigma akashiwo polyamines spermidine |
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