Phototropism in Vaucheria geminata II. The mechanism of bending and branching

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概要

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• The mechanism of phototropic bending and branching in Vaucheria geminata was analyzed. Using the half-side-illumination method it was shown that phototropic bending is initiated by the formation of a new growth center on the illuminated side of the apical dome of the tube, not by the difference in growth rate between the lighted and shaded sides of the tip. Branching was also initiated when the part proximal to the apical dome was illuminated. Blue light was effective for branching as it was for photo-tropic bending. The refractive indices measured at the growing tip and an area other than the tip were 1.36 and 1.34 respectively. A hyaline patch resembling the hyaline cap, which appeared prior to the onset of tip-growth in the apical dome, was invariably formed shortly before the initiation of a new branch at the illuminated locus.

• 日本植物生理学会の論文

著者

• Kataoka Hironao

  Department Of Biology Faculty Of Science Osaka University

関連論文

• Osmotic and ionic regulation in Nitella
• Second positive-and negative phototropism in Vaucheria geminata
• Phototropism in Vaucheria geminata I. The action spectrum
• Phototropism in Vaucheria geminata II. The mechanism of bending and branching

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