Phototropism in Vaucheria geminata I. The action spectrum

概要

論文の詳細を見る
A xanthophycean coenocytic alga Vaucheria geminata exhibited typical tip-growth. The growth pattern was closely related to the external L-D regime. Under a 12 L-12 D regime, the alga started to grow at the beginning of the dark period and ceased to grow at the end of the light period; while under a 24 L-0 D, it grew at a constant rate ranging from 100 to 200 μm/hr. The alga also exhibited positive phototropism. Using the half-side-illumination method the bending process was analyzed. The process followed Weber-Fechner's law and Bunsen-Roscoe's law. The action spectrum for the phototropism was determined, and results indicated that only blue light was effective. The hyaline cap, which was found only at the growing tip, shifted to the illuminated side of tip prior to bending.
日本植物生理学会の論文