Influence of nitrogen nutrition on spontaneous mutation in the blue-green alga Anabaena doliolum
β Scribed by H.N. Singh
- Book ID
- 116036590
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 195 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0027-5107
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Two kinds of cultures were raised from clones of Anabaena doliolum surviving on selective medium following exposure of spores to ultraviolet radiation. The pigments of these cultures h~ve been characterized with respect to those of controls.
## Abstract Growth and fixation of nitrogen were retarded in __Anabaena doliolum__ when grown on elemental nitrogen in presence of four different herbicides. The alga was found to be intolerant to these chemicals under nitrogen fixing conditions even in low concentrations. An inhibition of photosyn
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 Effects of UV radiation on the morphogenesis of __Anabaena doliolum__ are described. After irradiation the frequencies of the 2nd and 3rd cells in 4βcelled filaments differentiating into a heterocyst increase markedly. The spatial relations between successive heterocysts of the series i