pH Dependent Uptake and Reduction of Nitrate by Nostoc calcicola

Kashyap, A. K.; Gupta, Sanjay; Johar, G. S.

doi:10.1016/s0044-328x(82)80057-3

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…Also, pH of the medium showed an enhancement with increasing concentration of soil extract, which may in turn enhance N 2 fi xation. N. calcicola has been demonstrated to grow and fi x nitrogen maximally at a pH of 9.5 [26] and N 2 fi xing capacity of this organism continues till pH 10.5 [27]. At higher soil concentrations (40-100%), the growth performance of the mutant strain was much better than the wild type indicating that the mutant strain is better suited to grow in usar soil.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the potential of N. calcicola and its bicarbonate resistant mutant as bioameleorating agents for ‘usar’ soil

et al. 2009

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The potential of Nostoc calcicola and its bicarbonate resistant mutant as bioameleorating agent was investigated, using laboratory simulation experiments, in terms of their growth potential, glutamine synthetase (GS) activity, heterocyst frequency and effect on pH of soil. Nostoc calcicola, exhibited a tendency to lower the pH of 'usar' soil signifi cantly and showed better growth and pigment content at 20% soil extract as compared to basal medium. The bicarbonate resistant mutant (HCO 3 -R ) exhibited a better ability to grow at higher percentage of soil extract (60%), besides bringing about a more signifi cant change in soil pH as compared to wild type. The heterocyst frequency was much higher in the mutant strain, which was not signifi cantly affected by growth in various concentrations of soil extract. The mutant strain holds promise as a potential bioameliorant for 'usar' soil after further evaluation of its reclamative properties at fi eld level.

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Section: Discussionmentioning

confidence: 99%

Evaluating the potential of N. calcicola and its bicarbonate resistant mutant as bioameleorating agents for ‘usar’ soil

et al. 2009

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“…Organisms and growth conditions N. calcicola Breb, an 'usar' land isolate (solentz soil, pH 10.5-11.0), has been maintained in Algal Research Laboratory, Department of Botany, Banaras Hinhu University, for the last 20 years (Kashyap et al, 1982). Anabaena sp.…”

Section: Methodsmentioning

confidence: 99%