ISSN:
1432-2048
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Inhibitors and uncouplers of phosphorylation, i.e., arsenate, 2.4-dinitrophenol (DNP), pentachlorophenol (PCP), and carbonyl cyanide m-chlorophenylhydrazone (CCCP), inhibit the assimilation of nitrite by the green alga Ankistrodesmus braunii in the dark and in the light. In a medium containing nitrate, these inhibitors interrupt nitrate reduction at the level of nitrite. In phosphatedeficient algae, the assimilation of nitrite can be decreased by a concomitant, energy-dependent uptake of chloride and phosphate ions. These results support the assumption that high-energy phosphate is required for the assimilation of nitrite. CO2 and glucose (after pre-illumination) increase nitrite assimilation in the light. Photosynthetic nitrite reduction is inhibited by 3-(3′,4′-dichlorophenyl)-1,1-dimethyl urea (DCMU), an inhibitor of oxygen evolution, and by disalicylidene-propanediamine-(1,3) (DSPD), an inhibitor of the photosynthetic reduction of ferredoxin.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00391451
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