Abstract

Virtually nothing is known about the site of action of oil and the mechanism of inhibition of photosynthetic electron transport, a process responsible for the generation of ATP and NADPH, which are essential for carbon fixation. The present study was an attempt to learn something about these aspects. The influence of diesel on photosynthetic O{sub 2}-evolution, {sup 14}CO{sub 2} fixation, and electron transport system has been examined in Anabaena doliolum, a heterocystous cyanobacterium. A. doliolum and other heterocystous cyanobacteria are widely distributed in soil and aquatic ecosystems, and represent an important group of free-living nitrogen fixing microorganisms.

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