1887

Abstract

All vegetative cells of differentiated into akinetes. These showed respiratory O uptake but lacked photosynthetic pigments and O evolution. Activities of nitrogenase, glutamine synthetase, nitrate reductase and aspartate dehydrogenase were totally absent, while glutamate dehydrogenase showed extremely low activity. Glutamate-oxaloacetate transaminase activity was similar to that in whole filaments but alanine dehydrogenase and glutamate-pyruvate transaminase activities were much lower. Thus, transformation of vegetative cells into akinetes was accompanied by the loss of photosynthetic machinery, ammonia-generating systems and the enzyme of primary ammonia assimilation.

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1984-05-01
2022-01-17
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