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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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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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International Journal of Systematic and Evolutionary Microbiology, 2011
The heterotrophic, epiphytic, symbiotic bacterial strain WH2KTwas previously isolated from a two-member culture in which it was attached to the heterocysts of a strain ofAnabaena(SSM-00). Analysis of its 16S rRNA gene sequence demonstrated that the symbiont was most closely related to the type strain ofHoeflea marina(96.9 % similarity), which belongs ...
Bradley S, Stevenson +5 more
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The heterotrophic, epiphytic, symbiotic bacterial strain WH2KTwas previously isolated from a two-member culture in which it was attached to the heterocysts of a strain ofAnabaena(SSM-00). Analysis of its 16S rRNA gene sequence demonstrated that the symbiont was most closely related to the type strain ofHoeflea marina(96.9 % similarity), which belongs ...
Bradley S, Stevenson +5 more
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The Roles of Anabaena Azollae in Anabaena-Azolla Association
1991The roles of Anabaena in the symbiosis were studied by using Azolla strains with heterologous Anabaena azollae or without Anabaena. As a symbiont, Anabaena has a strong effect on the performances of Azolla either tolerance to high temperature or low temperature. Anabaena changed the absorption pattern of mineral nutrients of Azolla from the medium. The
Cang Lin +3 more
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Antigenic Analysis of Anabaena Azollae and Presence of Lectin in Azolla-Anabaena Association
1984Azolla has worldwide distribution and is represented by six recognizable species. The algal symbiont belongs to the Nostocaceae and generally referred to as A. azollae. It is not clear whether the symbiont is the same in the various Azolla species and specimens or if there are several strains of the symbiont.
J. K. Ladha, I. Watanabe
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Hydrogen evolution by photobleached Anabaena cylindrica
Planta, 1981We have studied the evolution of hydrogen by photobleached filaments of the heterocystous bluegreen alga Anabaena cylindrica. The photobleached cells became orange-yellow due to the heavy accumulation of carotenoids. We found that the yellow filaments produced much larger amounts of hydrogen than the normal, green ones, while the nitrogenase activity ...
I, Laczkó, K, Barabás
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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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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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A phytohaemagglutinin from the Azolla-anabaena symbiosis
Biochemical and Biophysical Research Communications, 1981Abstract Proteins recovered from cell-free extracts of the Azolla-Anabaena azollae symbiosis exhibited haemagglutination activity; galactose was the most effective carbohydrate tested in preventing haemagglutination. Extracts of cyanobacteria-free Azolla also caused haemagglutination but extracts of free-living or symbiotic Anabaena azollae did
Mellor, R. B. +3 more
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THE ROLE OF ANABAENA IN THE AZOLLA‐ANABAENA SYMBIOSIS
New Phytologist, 1977SUMMARYThe Anabaena cells in Azolla undergo a developmental pattern of differentiation parallel to that of the fern. At the apex, the algal cells are small and rapidly dividing, and do not fix atmospheric nitrogen. After the leaf cavities are colonized, the algal cells form heterocysts, fix nitrogen and the vegetative cells enlarge considerably.
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