Some Mutational Changes in the Photosynthetic Pigment System of Rhodopseudomonas spheroides
نویسندگان
چکیده
منابع مشابه
Fluorescence studies on photosynthetic pigment development in Rhodopseudomonas spheroides.
When bleached, aerobically grown cells of Rhodopseudornonas spheroides are transferred to semi-aerobic conditions to induce bacteriochlorophyll synthesis, a new fluorescence band, with a maximum at 790 nm, is observed in addition to the 885 nm emission maximum normally seen in pigmented cells. The 790 nm fluorescence may be due to bacteriochlorophyll which has not been bound into the chromatoph...
متن کاملProtochlorophyll-like Pigment Produced by Rhodopseudomonas spheroides
The identification of intermediates in the biosynthesis of chlorophyll has been largely dependent upon the use ofmutants of Chlorella that are unable to synthesize chlorophyll but accumulate in the medium various tetrapyrrole compounds assumed to be precursors (for a review see Granick & Mauzerall, 1961). In particular, Granick (1950) identified magnesium vinylphaeoporphyrin a5 monomethyl ester...
متن کاملPigment Carrying Structures of the Photosynthetic Non-sulphur Purple Bacterium Rhodopseudomonas Spheroides.
As observed under the electron microscope (6), aqueous extracts of photosynthetic bacteria contain grana-like structures; most probably, these organelles are built up of lamellae. Pardee, Schachman and Stanier (5) showed that the colored sediment obtained by centrifugation of aqueous extracts of Rhodospirillum rubrum consisted of the above-mentioned granalike structures. Niklowitz and Drews (4)...
متن کاملPhotosynthetic membrane development in Rhodopseudomonas spheroides. II. Correlation of pigment incorporation with morphological aspects of thylakoid formation.
Cells of Rhodopseudomonas spheroides were depigmented by aerobic growth in the light and then transferred to 4% oxygen in the dark to induce pigment synthesis. Pi3xnent synthesis and photochemical activity were measured fluororr~etrically. In conjunction with the fluorescence studies, thylakoid morphogenesis was followed by electron microscopy of thin sections of cells fixed during the repigmen...
متن کاملProperties of a cytochrome c-enriched light particulate fraction isolated from the photosynthetic bacterium Rhodopseudomonas spheroides.
Differential centrifugation of suspensions of French-press-disrupted Rhodopseudomonas spheroides yielded a light particulate fraction that was different in many properties from the bulk membrane fraction. It was enriched in cytochrome c and had a low cytochrome b content. When prepared from photosynthetically grown cells this fraction had a very low specific bacteriochlorophyll content. The cyt...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1956
ISSN: 0022-1287
DOI: 10.1099/00221287-14-3-698