Effects of abiotic factors on nitrogen fixation by blue-green algae in Antarctica
β Scribed by A. Davey
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 528 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0722-4060
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In long-term experiments, nitrogen fixation in photosynthetic organisms is usually dependent upon the presence of light (FoGG and THAN TUN, 1960; F\_au and FOGG, 1962) although certain photosynthetic nitrogen-fixers can grow and fix nitrogen in the dark using organic media (Nostoc muscorum, ALLISON,
## Abstract Nitrogenβfixation by two species of __Nostoc__, one of them a lichen phycobiont, was generally stimulated by low concentrations of arsenic, cadmium, nickel, lead, palladium, and zinc. Higher concentrations (0.025 to 0.125 ppm) of arsenic, nickel, and palladium were also stimulatory; how