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Plant Physiology 50:743-746 (1972)
© 1972 American Society of Plant Biologists

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Bacteriochlorophyll Synthesis and the Ultrastructure of Wild Type and Mutant Strains of Rhodopseudomonas spheroides1

A. E. Brown2, F. A. Eiserling and June Lascelles

a Department of Bacteriology, University of California, Los Angeles, California 90024

The ultrastructure of sectioned cells of mutant and wild type Rhodopseudomonas spheroides has been examined by electron microscopy. The characteristic vesicles associated with the presence of bacteriochlorophyll were found in wild type cells grown with low aeration. These were also found in mutant TA-R which forms bacteriochlorophyll under high aeration. None of the mutants with blocks in bacteriochlorophyll synthesis contained intracytoplasmic membrane. These included mutant 8-17 which accumulates bacteriochlorophyllide but fails at the phytolation step. We conclude that the intact bacteriochlorophyll molecule, or some particular membrane protein associated with it, is needed for the development of the characteristic intracytoplasmic membrane system in R. spheroides.

2 Predoctoral trainee of the National Institutes of Health Training Grant GM-1297. Present address: Department of Microbiology, University of Indiana Medical School, Indianapolis, Ind.

1 This work was supported by grants from the National Science Foundation (GB 14967) and the National Institutes of Health (5 ROI AM 11148).




This article has been cited by other articles:


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 J. Bacteriol.Home page
H. A. Addlesee, L. Fiedor, and C. N. Hunter
Physical Mapping of bchG, orf427, and orf177 in the Photosynthesis Gene Cluster of Rhodobacter sphaeroides: Functional Assignment of the Bacteriochlorophyll Synthetase Gene
J. Bacteriol., June 1, 2000; 182(11): 3175 - 3182.
[Abstract] [Full Text]


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