Growth requirements of blue-green algae under blue light conditions |
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Authors: | Warren M Pulich Jr Chase Van Baalen |
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Institution: | 1. Marine Science Institute, University of Texas, 78373, Port Aransas, Texas
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Abstract: | - Growth requirements of blue-green algae containing only the c-phycocyanin + chlorophyll a pigment system have been studied under blue light (380–540 nm) which approximates light conditions existing in subsurface waters in nature.
- While a few species were capable of very slow photosynthetic growth on minimal medium with NO3 - as nitrogen source, most species were dependent on organic compounds for comparable growth under this condition. Some organisms did quite well with only Casamino Acids as a supplement, others did well with only glucose. One species, Agmenellum quadruplicatum strain PR-6, grew only when glucose and Casamino Acids were supplied simultaneously.
- Inhibitory effects of blue light on CO2 fixation and nitrogen metabolism are noted as possible explanations of these responses.
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