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Heterocyst Differentiation and Nitrogen Fixation in Cyanobacteria
2007Cyanobacteria face the difficult problem of fixing nitrogen while generating oxygen. Some solve this problem by storing carbohydrate during the day and using the stored material to fuel nitrogen fixation during the night. Others, notably Trichodesmium, a filamentous organism that is one of the major nitrogen fixers in the ocean, fixes only during the ...
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Molecular Microbiology, 1994
SummaryEvident differentiation of vegetative cells into hetero‐cysts in Anabaena sp. strain PCC 7120 is prevented by Insertions in genes hetR and hetP. Nostoc ellipsosporum possesses single copies of genes that hybridize with hetR and hetP. In mutant NE2 of N. ellipsosporum, in which hetR is interrupted by an insert, and in a double recombinant of wild‐
F, Leganés +2 more
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SummaryEvident differentiation of vegetative cells into hetero‐cysts in Anabaena sp. strain PCC 7120 is prevented by Insertions in genes hetR and hetP. Nostoc ellipsosporum possesses single copies of genes that hybridize with hetR and hetP. In mutant NE2 of N. ellipsosporum, in which hetR is interrupted by an insert, and in a double recombinant of wild‐
F, Leganés +2 more
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Rearrangement of nif genes during cyanobacterial heterocyst differentiation
Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1987Anabaena is a filamentous cyanobacterium that produces specialized cells, called heterocysts, at regular intervals along each filament when deprived of fixed nitrogen under aerobic conditions. Heterocysts are anaerobic factories for nitrogen fixation. In Anabaena vegetative-cell DNA, the nifD
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Protein‐transients during heterocyst differentiation in Anabaena circularis and Cylindrospermum sp
Zeitschrift für allgemeine Mikrobiologie, 1980AbstractThe programme of protein synthesis accompanying cellular differentiation to the heterocyst following transfer of the blue‐green algae Anabaena circularis and Cylindrospermum sp. (CBSC 1755) from ammonia‐enriched medium to nitrogen‐free medium was determined by polyacrylamide gel electrophoresis of whole proteins during successive intervals of ...
I S, Grover, R, Kaur, S, Puri
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A new player in the regulatory cascade controlling heterocyst differentiation in cyanobacteria
Molecular Microbiology, 2010SummaryHeterocysts are terminally differentiated cells that fix nitrogen in filaments of the cyanobacterium Anabaena PCC 7120. They differentiate from vegetative cells at regular intervals along each filament. The developmental process is initiated by an increase in the ratio of reduced carbon to reduced nitrogen.
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Cell size and heterocyst differentiation in nostocacean blue-green algae.
Cytobios, 1981Cell size variations in three heterocystous blue-green algae, viz. Nostoc muscorum (ISU strain), N. muscorum (UW strain) and N. calcicola (a local isolate) have been surveyed under conditions permissive and non-permissive of heterocyst differentiation. A monomodal distribution pattern was observed for the two strains of N. muscorum under conditions not
P K, Yadava, S P, Singh
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The heterocysts of blue-green algae. III. Differentiation and nitrogenase activity
Proceedings of the Royal Society of London. Series B. Biological Sciences, 1972The course of heterocyst development in Anabacna cylindrica was studied in relation to the ability to fix nitrogen. When non-differentiated filaments, grown in the presence of ammonium-N, were transferred into a medium free from combined nitrogen and incubated under photosynthetic conditions, the cellular C:N ratio ...
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Hacking heterocysts: advances in the genetic regulation of heterocyst differentiation
Archives of MicrobiologySandhya Deora +3 more
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Heterocyst Differentiation and Nitrogen Fixation in Cyanobacteria
1997Robert Haselkorn, William J. Buikema
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