Effects of Calcium and Potassium Ions on Phototaxis in Cryptomonas
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概要
- 論文の詳細を見る
Effects on positive phototaxis and the cell motility of 7 cations in 5 mM MOPS (morpholinopropane sulfonic acid) buffer (pH 7.0) containing 0.16 mM NaCl, 0.68 mM KCl, 0.5 mM CaCl_2 and 0.16 mM MgCl_2 were studied in the unicellular flagellate Cryptomonas with a photoelectrical measuring apparatus and photomicrography. When calcium ion was removed from the medium by adding 1 mM EGTA (ethylene glycol-bis-(β-amino-ethylether)-N,N'-tetraacetic acid), the phototactic response was totally inhibited, but the swimming rate was not much affected. The effect of EGTA was partially reversed by the addition of 1 mM CaCl_2. When 15 mM KCl or RbCl was added to the medium, phototaxis was greatly inhibited, but there was no significant influence on the swimming rate. Similar but less inhibitory effects were induced in the presence of NaCl, LiCl and CsCl. KCl-induced inhibition was partially removed by the addition of 15 mM CaCl_2 or MgCl_2.
- 日本植物生理学会の論文
著者
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Furuya Masaki
Department Of Botany Faculty Of Science University Of Tokyo
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Uematsu-Kaneda Hisako
Department of Biology, Faculty of Science, University of Tokyo
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Uematsu-kaneda Hisako
Department Of Biology Faculty Of Science University Of Tokyo
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