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The pattern of development of Anabaena in the Azolla-Anabaena symbiosis
Planta, 1975The development of Anabaena in the leaf cavities of Azolla (probably A. filiculoides) was studied. After the alga is installed in the cavity, heterocyst frequency rises to a maximum (20-30%) about 12 leaves from the apex, then remains constant until the leaf senesces.
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Localization of Nitrogen Fixation in Anabaena
Nature, 1971THE function of heterocysts in blue-green algae has been controversial for some time; there are indications that these enlarged cells are the site of nitrogen fixation1,2. But non-heterocystous blue-green algae may fix nitrogen if grown under low oxygen tension3, so that heterocysts are not essential for nitrogen fixation in these algae. According to a
H J, van Gorkom, M, Donze
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Protein HU from the cyanobacterium Anabaena
Biochimie, 1994Protein HU was purified from the cyanobacterium Anabaena 7120. Its complete amino acid sequence was determined by automated Edman degradation of the whole protein and of CNBr and chymotryptic peptides. The active DNA-binding protein is a homodimer of 94-amino acid subunits.
R, Nagaraja, R, Haselkorn
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Photochromism ofAnabaenaSensory Rhodopsin
Journal of the American Chemical Society, 2007Protein-controlled photochemical reactions often mediate biological light-signal and light-energy conversions. Microbial rhodopsins possess all-trans or 13-cis retinal as the chromophore in the dark, and in the light-driven proton pump, bacteriorhodopsin (BR), the stable photoproduct at the end of the functional cycle of the all-trans form is 100% all ...
Akira, Kawanabe +3 more
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Activation of sulphate in Anabaena cylindrica
Planta, 1976Crude cell-free extracts of Anabaena cylindrica synthesized adenosine-5'-phosphosulphate (AP(35)S) and 3'-phosphoadenosine-5'-phosphosulphate (PAP(35)S) from (35)SO4 (2-) in the presence of Mg(2+), ATP and inorganic pyrophosphatase. Maximum AP(35)S and PAP(35)S were produced at pH 7.15 and 8.05, respectively.
S K, Sawhney, D J, Nicholas
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Archives of Microbiology, 2006
Anabaena azotica FACHB-118 and Anabaena sp. CH1, heterocystous cyanobacteria isolated from Chinese and Taiwanese rice fields, expressed vanadium-containing nitrogenase when under molybdenum deficiency. This is the second direct observation of an alternative nitrogenase in cyanobacteria.
Boison, G. +3 more
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Anabaena azotica FACHB-118 and Anabaena sp. CH1, heterocystous cyanobacteria isolated from Chinese and Taiwanese rice fields, expressed vanadium-containing nitrogenase when under molybdenum deficiency. This is the second direct observation of an alternative nitrogenase in cyanobacteria.
Boison, G. +3 more
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Protochlorophyllide Reduction in Anabaena
1987Protochlorophyllide (pchlide) reduction is an essential step in the formation of chlorophyll (chl). There are at least two enzymes which catalyse the conversion of pchlide to chlorophyllide (chlide): the light-dependent enzyme, NADPH-pchlide oxidoreductase (EC.1.6.99.1) (1) and an uncharacterised light-independent enzyme.
Heather Adamson +3 more
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The Azolla — Anabaena Azzolae Symbiosis
1977Free-living, nitrogen fixing blue-green algae occur in soils and in both fresh water and marine habitats from the tropics to the antarctic.l–3 Moreover, symbiotic relationships with nitrogen-fixing blue-green algae encompass members of a relatively large and diverse segment of the plant kingdom.
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Anabaena cylindrica Lemmermann 1896
2018Anabaena cylindrica Lemmermann (1896: 186) Fig. 36 A–B. Filaments aggregated into fine mucilaginous mats. Trichomes flexuous to irregularly coiled, and variously entangled, constricted at the cross walls, not attenuated towards the ends. Vegetative cells isodiametric or up to 1.5 × longer than wide, 3.9–5.6 μm long × 3.4–4.6 μm wide; apical cells ...
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