Results 171 to 180 of about 2,612 (190)
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Effect of 7-azatryptophan on heterocyst differentiation inAnabaena doliolum Bharadwaja
Proceedings / Indian Academy of Sciences, 1978The effect of DL-7-azatryptophan, an analogue of tryptophan, has been studied on the heterocyst spacing pattern and the probability of proheterocyst regression inAnabaena doliolum. 7-azatryptophan suppressed growth and induced heterocyst differentiation in nitrogen-free medium.
Manju Agrawal, H D Kumar
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Heterocyst Differentiation and Nitrogen Fixation in the Cyanobacterium Anabaena
1999Some cyanobacteria, e.g. Anabaena, protect nitrogenase from oxygen by differentiating specialized cells, heterocysts, at regular intervals along each filament. These cells have a new outer envelope consisting of a polysaccharide layer and a crystalline glycolipid layer.
R. Haselkorn, K. Jones, W. J. Buikema
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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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Nature, 1985
Nitrogen fixation by the cyanobacterium Anabaena is carried out in heterocysts, specialized, non-dividing cells which differentiate under conditions of ammonia or nitrate deprivation. In Anabaena, heterocyst differentiation is accompanied by rearrangement of some nitrogen fixation genes.
J W, Golden, S J, Robinson, R, Haselkorn
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Nitrogen fixation by the cyanobacterium Anabaena is carried out in heterocysts, specialized, non-dividing cells which differentiate under conditions of ammonia or nitrate deprivation. In Anabaena, heterocyst differentiation is accompanied by rearrangement of some nitrogen fixation genes.
J W, Golden, S J, Robinson, R, Haselkorn
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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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Response of heterocyst differentiation of Dolichospermum to different forms of nitrogen deficiency
Harmful AlgaeIn recent years, initiatives aimed at mitigating eutrophication have successfully reduced nitrogen and phosphorus concentrations in numerous lakes across China. Notably, the management of total nitrogen levels has prompted a shift in the dominant genera responsible for harmful algal blooms.
Zichen Liu +6 more
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Transcriptional regulation of heterocyst differentiation in Anabaena sp. strain PCC 7120
Russian Journal of Plant Physiology, 2013Anabaena sp. strain PCC 7120 is a filamentous cyanobacterium, in which particular vegetative cells differentiate into heterocysts with a regular spacing of 10–15 cells. Heterocysts are specialized cells for nitrogen fixation, and its differentiation is triggered by limitation of combined nitrogen in the medium.
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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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