Summary
The single, ribbon-shaped chloroplast in the filamentous green algaMougeotia performs orientational movements with respect to light. The chain of reaction involves phytochrome as the photoreceptor pigment to perceive the light signal differentiated by wavelength and direction, calcium probably to convert the light signal into a chemical message and actomyosin to respond to this message and to move the chloroplast accordingly.Precise reorientation of the chloroplast is proposed to be brought about by a dual function of phytochrome: regulation of the cellular level of calciumand regulation of membrane anchorage sites to actin.
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The Institute where ProfessorKamiya did early research together with ProfessorKüster.
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Wagner, G., Klein, K. Mechanism of chloroplast movement inMougeotia . Protoplasma 109, 169–185 (1981). https://doi.org/10.1007/BF01287638
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DOI: https://doi.org/10.1007/BF01287638