Effect of glutamine on growth and heterocyst differentiation in the cyanobacterium Anabaena variabilis
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چکیده
منابع مشابه
Effect of glutamine on growth and heterocyst differentiation in the cyanobacterium Anabaena variabilis.
Mutants of the cyanobacterium Anabaena variabilis that were capable of increased uptake of glutamine, as compared with that in the parental strains, were isolated. Growth of these mutants and their parental strains was measured in media containing N2, ammonia, or glutamine as a source of nitrogen. All strains grew well with any one of these sources of fixed nitrogen. Much of the glutamine taken...
متن کاملEffect on heterocyst differentiation of nitrogen fixation in vegetative cells of the cyanobacterium Anabaena variabilis ATCC 29413.
Heterocysts are terminally differentiated cells of some filamentous cyanobacteria that fix nitrogen for the entire filament under oxic growth conditions. Anabaena variabilis ATCC 29413 is unusual in that it has two Mo-dependent nitrogenases; one, called Nif1, functions in heterocysts, while the second, Nif2, functions under anoxic conditions in vegetative cells. Both nitrogenases depended on ex...
متن کاملHeterocyst differentiation and cell division in the cyanobacterium Anabaena cylindrica: effect of high light intensity.
Heterocyst differentiation in the cyanobacterium Anabaena cylindrica is initiated by the removal of fixed nitrogen from the medium. These specialized cells occur singly at regular intervals within filaments of vegetative cells. Incubation of cultures for periods of up to 12 h immediately prior to or following removal of fixed nitrogen, at a light intensity (500 mi Einsteins cm-2 s-1) approximat...
متن کاملBioenergetics Studies of the Cyanobacterium Anabaena variabilis
A cell-free system exhibiting both photophosphorylation (P /2e = 1) and oxidative phosphoryla tion (P/O up to 0 .8 ) is described for the cyanobacterium Anabaena variabilis. NADH and N A D PH were found to be equally effective as electron donors for oxidative phosphorylation. Low concentrations of U H D B T , an inhibitor of the cytochrome blc complex of mitochondria and chloroplasts. were fou...
متن کاملMolybdate transport and its effect on nitrogen utilization in the cyanobacterium Anabaena variabilis ATCC 29413.
Molybdenum is an essential component of the cofactors of many metalloenzymes including nitrate reductase and Mo-nitrogenase. The cyanobacterium Anabaena variabilis ATCC 29413 uses nitrate and atmospheric N2 as sources of nitrogen for growth. Two of the three nitrogenases in this strain are Mo-dependent enzymes, as is nitrate reductase; thus, transport of molybdate is important for growth of thi...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1986
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.168.2.769-774.1986