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- Title
PHOTOINDUCTION AND PHOTOREVERSAL OF THE NOSTOCACEAN DEVELOPMENTAL CYCLE.
- Authors
Lazaroff, Norman
- Abstract
The development cycle of Nostoc muscorum, a nitrogen-fixing blue-green alga, is controlled by the spectral quality of illumination. Red light with peak activity at 650 mμ induces development of filaments from a nonfilamentrous (ascriale) stage of the lifecycle. Red-light photoinduction is reversed by simultaneous or subsequent exposure to light from a broad band in the green region of the spectrum. Photoreversibility of the red-light induction, by green light, reversibility of the red-light induction, by green light, decays over 24 hr after the primary stimulus. Allophycocyanin is indicated to be the photoreceptor of red-light induction. One or more Phycoerythrins may operate as photoreceptors for reversal of induction. The dosage response and wavelength dependence of developmental photocontrol in Nostoc muscorum A indicate that a non-photosynthetic mechanisms involved in both developmental photoinduction and its photoreversal.
- Subjects
NOSTOC; CYANOBACTERIA; NITROGEN-fixing algae; PLANT photoreceptors; PLANT development; PHOTOSYNTHESIS
- Publication
Journal of Phycology, 1966, Vol 2, Issue 1, p7
- ISSN
0022-3646
- Publication type
Article
- DOI
10.1111/j.1529-8817.1966.tb04585.x