Vitamin B12 Activity of Chlorella vulgaris Beij and Anabaena cylindrical Lemm

Brown, F. B.; Cuthbertson, William; Fogg, G. E.

doi:10.1038/177188a0

Cited by 24 publications

(6 citation statements)

References 4 publications

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“…They are not synthesized by green plants, and therefore, they can also act as an important growth regulator for land plants. Vitamin B 12 (cyanocobalamin) have been reported in cyanobacteria, as early as 1956 by Brown et al . in Anabaena cylindrical, followed by Okuda and Yamaguchi in 1960 and later in Anabaena cycadae by Venkatraman et al . ().…”

Section: Signalling Molecules Of Cyanobacteriamentioning

confidence: 99%

A review on possible elicitor molecules of cyanobacteria: their role in improving plant growth and providing tolerance against biotic or abiotic stress

Singh

2014

J Appl Microbiol

135

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Cyanobacteria are prominent inhabitants of many agricultural soils, where they potentially contribute towards biological nitrogen fixation, help in phosphate solubilization and mineral release to improve soil fertility and crop productivity. However, beside naturally fertilizing and balancing mineral nutrition in the soil, many cyanobacteria are known to release various kinds of biologically active substances like proteins, vitamins, carbohydrates, amino acids, polysaccharides and phytohormones that function as elicitor molecules to promote plant growth and help them to fight against biotic and abiotic stress. These metabolites produced by the cyanobacteria affect the gene expression of the host plants and thereby bring about qualitative and quantitative changes in the phytochemical composition of the plants. Experiments carried out with live inoculum or with the extracts of cyanobacterial strains on several plant species, such as rice, wheat, maize, cotton etc., have demonstrated the synthesis of signalling metabolites. Thus, in view of its beneficial effect, this paper reviews the role of cyanobacteria in triggering the growth and development of plants and hence its utilization in agriculture.

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Section: Signalling Molecules Of Cyanobacteriamentioning

confidence: 99%

A review on possible elicitor molecules of cyanobacteria: their role in improving plant growth and providing tolerance against biotic or abiotic stress

Singh

2014

J Appl Microbiol

135

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“…Empirically it is, of course, exceedingly difficult to answer a negative question, and so the few people who are interested in the biosynthesis of compounds that we cannot make have to turn to other sources. Now, B12 is a microbiologists' vitamin for, with the exception of some algae (43,90) and some unconfirmed reports ascending from peas (114) directly to mammals (293,295), its biosynthesis is a bacterial monopoly. It is apparently not made by yeasts (18,83,ISO,225).…”

Section: Introductionmentioning

confidence: 97%

Microbial Biosynthesis of B12-Like Compounds

Friedmann¹,

Cagen²

1970

Annu. Rev. Microbiol.

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“…Only a small number of marine species have been shown by van Baalen to require vitamin B12 for growth (2). Nevertheless, the requirement for cobalt by these organisms is universal (3) and various corrinoids have been extracted from species such as Anabaena cylindrica (4,5).…”

mentioning

confidence: 99%

“…Thus the occurrence of a cofactor-requiring reductase may be further proof of their early evolution. The lack of activity in the few green algae [Chlorella and Chlamydomonas (5)] that were tested is surprising as the Chlorophyceae supposedly evolved from a blue-green algal ancestor. It may be that the green algae are more closely related to the higher plants that contain no vitamin B12 (23) and only remotely related to extant blue-green algae.…”

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confidence: 99%

Ribonucleotide Reductase in Blue-Green Algae: Dependence on Adenosylcobalamin

Gleason

Wood

1976

Science

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Ten species of freshwater blue-green algae exhibit an adenosylcobalamin-dependent ribonucleotide reductase, thuse explaining the requirement for cobalt by these organisms. The evidence suggests a phylogenetic affinity between the cyanophytes and bacteria, such as Clostridium and Rhizobium, and the euglenoid flagellates, which also use the cofactor-dependent reductase. In contrast, the ribonucleotide reductase reaction in the few green algae surveyed shows no dependence on cobalamins.

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Vitamin B12 Activity of Chlorella vulgaris Beij and Anabaena cylindrical Lemm

Cited by 24 publications

References 4 publications

A review on possible elicitor molecules of cyanobacteria: their role in improving plant growth and providing tolerance against biotic or abiotic stress

A review on possible elicitor molecules of cyanobacteria: their role in improving plant growth and providing tolerance against biotic or abiotic stress

Microbial Biosynthesis of B12-Like Compounds

Ribonucleotide Reductase in Blue-Green Algae: Dependence on Adenosylcobalamin

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