This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Reprints and Permissions Copyright Information Books from ASM Press MicrobeWorld Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kaneshiro, T. Articles by Zweig, G. Search for Related Content PubMed Articles by Kaneshiro, T. Articles by Zweig, G. Agricola Articles by Kaneshiro, T. Articles by Zweig, G.

 Previous Article  |  Next Article 

Appl Environ Microbiol. 1965 November; 13(6): 939-944
Copyright © 1965 American Society for Microbiology. All Rights Reserved.

Effect of Diquat (1,1'-Ethylene-2,2'-Dipyridylium Dibromide) on the Photosynthetic Growth of Rhodospirillum rubrum

Agricultural Toxicology and Residue Research Laboratory, University of California, Davis, California

ABSTRACT

Diquat (2 x 10^-4M) inhibited both aerobic and anaerobic growth of Rhodospirillum rubrum. With photosynthetic cultures, diquat affected the synthesis of bacteriochlorophyll more readily than cell mass (turbidity). Diquat retarded the synthesis of bacteriochlorophyll and some protein more readily than that of other cellular constituents such as ribonucleic acid, deoxyribonucleic acid, and cell mass. With cells deficient in phosphate, diquat inhibited the uptake-conversion of inorganic phosphate completely only when 3-(3,4-dichlorophenyl)-1,1'-dimethyl urea and ascorbate were also present.