Studies on the Hill reaction of membrane fragments of blue-green algae III. Fluorescence characteristics of membrane fragments of Anabaena variabilis and Anabaena cylindrica

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概要

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• Fluorescence spectra of the pigment system at -196℃ in membrane fragments of Anabaena variabilis and A. cylindrica were investigated. The fluorescence spectra of membrane fragments having four emission bands at 645-655, 685, 695 and 725 nm were basically similar to those reported for intact cells of blue-green algae, though the emission from phycocyanin (645-655 nm) was far stronger with membrane fragments than with intact algal cells. Incubation of membrane fragments of A. variabilis in a dilute buffer ( 10^lt;-2'gt: M, pH 7.5) caused an increase in the 645 nm fluorescence and slight decreases in the 685 and 695 nm fluorescences, but had no influence on the 725 mn fluorescence. The decrease in the 685 and 695 nm fluorescences of A. cylindrica was more marked and had the same kinetics as the inactivation of photosystem II reaction measured by DPIP-photoreduction. When membrane fragments of A. cylindrica were incubated in the buffer solution at room temperature or in the presence of MgCl_2 ( 10^<-3> M) at 0℃ ; phycobilin aggregates, which emitted the 655 and 685 nm fluorescence, were solubilized. This solubilization was not observed with membrane fragments of A. variabilis.

• 日本植物生理学会の論文

著者

• Fujita Yoshihiko

  Ocean Research Institute University Of Tokyo

• Suzuki Reiko

  Ocean Research Institute University Of Tokyo

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