Role of Calcium in Phototaxis of Physarum polycephalum

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概要

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• The calcium transport blockers, ruthenium red and lanthanum ions, inhibit negative phototactic orientation in the acellular slime mold, Physarum polycephalum. Likewise, agents known to enhance calcium fluxes (caffeine and phosphatidic acid) affect photo-orientation as well as trimethyl-phenyl-phosphonium^+ which impairs electrochemical gradients across membranes. The results suggest that calcium fluxes are involved in the sensory transduction of phototactic orientation in this organism. The cation transport through the channels occurs passively along a previously established gradient built by energy dependent calcium pumps. Inhibition of these pumps by poly-L-lysine also impairs phototactic orientation. The location of the calcium transport phenomena is discussed.

• 日本植物生理学会の論文

著者

• Haeder D‐p

  Univ. Erlangen‐nuernberg Deu

• Hader Donat-p.

  Fachbereich Biologie Universitat Marburg

関連論文

• An Optical Model for Phototactic Orientation in Dictyostelium discoideum Slugs
• Photokinesis and Photophobic Responses in the Gliding Flagellate, Euglena mutabilis
• Phototactic Orientation in Plasmodia of the Acellular Slime Mold, Physarum polycephalum
• Role of Calcium in Phototaxis of Physarum polycephalum

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