, Volume 127, Issue 1–2, pp 93–100 | Cite as

Mechanism of inhibition of cytoplasmic streaming by myrmicacin (Β-hydroxydecanoic acid) inChara andSpirogyra

  • Teruo Shimmen
  • Masashi Tazawa


Myrmicacin (Β-hydroxydecanoic acid) applied externally inhibited the cytoplasmic streaming ofChara cells in acidic (pH 4.5) but not in neutral (pH 7.5) solution. Application by intracellular perfusion at neutral pH also did not inhibit the streaming. Other carboxylic acids could inhibit the streaming when given as an acidic external solution. Inhibition of the cytoplasmic streaming was concluded to occur due to acidification of the intracellular pH upon application of an acidic external medium of these carboxylic acids. The cytoplasmic streaming ofSpirogyra was also inhibited by myrmicacin and acetic acid in acidic solution.


Chara Cytochalasin B Cytoplasmic pH Cytoplasmic streaming Myrmicacin Spirogyra 



artificial pond water


cytochalasin B


3.3-dimethylglutaric acid




ethyleneglycol-bis-(\-aminoethyl ether)N


tetraacetic acid




ethanesulfonic acid


2-(N-morpholino)ethanesulfonic acid


intracellular pH




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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Teruo Shimmen
    • 1
  • Masashi Tazawa
    • 1
  1. 1.Department of Botany, Faculty of ScienceUniversity of TokyoTokyoJapan

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