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- Title
Cultivation in the Dark of the Blue-green Alga Fremyella diplosiphon. A Photoreversible Effect of Green and Red Light on Growth Rate.
- Authors
Diakoff, Stephen; Scheibe, Joseph
- Abstract
The blue-green alga Fremyella diplosiphon Drouet can be grown in the dark on a medium consisting of mineral salts, glucose, and casein hydrolysate. A variety of organic substances was tested for effectiveness as a carbon or nitrogen source. The most effective individual compounds were glucose and citrulline, respectively. A daily irradiation of 5 min green light depresses the dark growth rate. The effect of green is reversible by brief irradiation with red light, and multiple photoreversibility was demonstrated. This green, red-reversible effect on dark growth rate may be related to other photomorphogenic responses to brief irradiation with green and red in the Cyanophyta. A master photoreversible pigment similar to phytochrome is a possible photoreceptor for these effects.
- Subjects
GREEN algae; EFFECT of light on plants; PLANT growth; MONOSACCHARIDES; CYANOBACTERIA; PLANT pigments; FREMYELLA diplosiphon
- Publication
Physiologia Plantarum, 1975, Vol 34, Issue 2, p125
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1975.tb03805.x