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Variability of nitrogen fixation in some isolates of Nostoc linckia

โœ Scribed by J. K. Ladha; Prof. H. D. Kumar


Book ID
102393415
Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
316 KB
Volume
17
Category
Article
ISSN
0233-111X

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โœฆ Synopsis


Abstract

Four clonal isolates of Nostoc linckia isolated from different localities were compared with respect to growth, nitrogen content (cellular and extracellular), and pigment composition. A considerable range of variation was observed among these isolates. This indicates the existence of genetically distinct clonal populations of the alga in natural habitats.


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The combined effect of a hormone weed killer 2,4-dichlorophenoxyacetic acid (2,4-D) and an amino acid (tryptophan) has been studied on growth and heterocyst differentiation in the cyanobacterium Nostoo linckia. 2.4-D a t 100 pg/ml stimulated growth and heterocyst frequency in combined nitrogen-free