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Heterocyst development in Anabaena
Current Opinion in Microbiology, 2003Many filamentous nitrogen-fixing cyanobacteria protect nitrogenase from oxygen in differentiated cells called heterocysts. Heterocyst development is controlled by the availability of nitrogen compounds in the environment and by intrinsic factors that regulate the frequency and pattern of heterocysts along vegetative cell filaments.
James W, Golden, Ho-Sung, Yoon
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Heterocyst formation in Anabaena
Current Opinion in Microbiology, 1998Heterocystous cyanobacteria grow as multicellular organisms with a distinct one-dimensional developmental pattern of single nitrogen-fixing heterocysts separated by approximately ten vegetative cells. Several genes have been identified that are required for heterocyst development and pattern formation.
J W, Golden, H S, Yoon
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Photoreduction of acetylene by heterocysts
Planta, 1971Heterocysts of aerobically grown Anabaena cylindrica can reduce acetylene in the light, without added cofactors, up to 30% as rapidly as can the intact filaments from which they are derived.
C P, Wolk, E, Wojciuch
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Distribution of heterocyst glycolipids in cyanobacteria
Phytochemistry, 2009Thirty-four axenic strains of cyanobacteria were analysed for their glycolipid content using high performance liquid chromatography coupled to electrospray ionisation tandem mass spectrometry (HPLC/ESI-MS(2)). Species of the families Nostocaceae and Rivulariaceae, capable of biosynthesising heterocysts, contained a suite of glycolipids consisting of ...
Bauersachs, T. +5 more
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Lipid Composition of Heterocysts
Nature, 1969WE have reported the isolation and partial characterization of a novel lipophilic glycoside which is apparently specific to nitrogen-fixing blue-green algae1. During these studies we noticed that a culture of Mastigocladus laminosus which had been grown in a medium containing ammonium salts synthesized no detectable quantities of the glycoside.
Walsby, AE, Nichols, BW
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Pigments and lipids of heterocysts
Planta, 1969Heterocysts of autotrophically grown Anabaena cylindrica contain about 77% as much chlorophyll as do vegetative cells, have little phycocyanin, and appear to lack myxoxanthophyll. Heterocysts have a photosystem I. Lipids of the two cell types differ.
C P, Wolk, R D, Simon
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Annual Review of Genetics, 1996
▪ Abstract Heterocysts are microaerobic, N2-fixing cells that form in a patterned array within O2-producing filamentous cyanobacteria. Structural features of heterocysts can be predicted from consideration of their physiology. This review focuses on the spacing mechanism that determines which cells will differentiate, and on the regulation of the ...
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▪ Abstract Heterocysts are microaerobic, N2-fixing cells that form in a patterned array within O2-producing filamentous cyanobacteria. Structural features of heterocysts can be predicted from consideration of their physiology. This review focuses on the spacing mechanism that determines which cells will differentiate, and on the regulation of the ...
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Nitrogenase activity in extracts of heterocystous and non-heterocystous blue-green algae
Archiv f�r Mikrobiologie, 1970Cell-free extracts capable of acetylene reduction and cyanide reduction have been prepared from heterocystous (Anabaena cylindrica) and non-heterocystous (Plectonema boryanum 594) blue-green algae. Extracts from Anabaena were obtained from cultures grown in blulk under aerobic conditions, while the Plectonema cultures were grown in bulk on nitrate ...
A, Haystead, R, Robinson, W D, Stewart
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Hacking heterocysts: advances in the genetic regulation of heterocyst differentiation
Archives of MicrobiologyHeterocyst differentiation in certain filamentous cyanobacteria is a multifaceted process essential for nitrogen fixation, orchestrated by a sophisticated regulatory network that encompasses several key stages. These include induction, pattern differentiation, commitment, extracellular layer formation, cell-cell communication, and ultimately, nitrogen ...
Sandhya Deora +3 more
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Synthesis of nitrogenase by isolated heterocysts
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, 1982Heterocysts isolated from Anabaena variabilis incorporate [14C]leucine and [35S]methionine into trichloroacetic acid-precipitable material in the light. Analysis by polyacrylamide gel electrophoresis shows that the radioactivity is present in polypeptides of discrete sizes. However, the relative proportions of different proteins synthesized by isolated
S, Janaki, C P, Wolk
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