D. Tiwari

Publications38
h-index7
Citations166
Highly Influential Citations5
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Effects of selected rice-field herbicides on photosynthesis, respiration, and nitrogen assimilating enzyme systems of paddy soil diazotrophic cyanobacteria
Abstract Two preemergence herbicides, butachlor and fluchloralin, showed little effect on the photosynthetic oxygen evolution of Nostoc muscorum and Gloeocapsa sp. Propanil, a postemergence… Expand
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Siderophore mediated attenuation of cadmium toxicity by paddy field cyanobacterium Anabaena oryzae
Abstract The efficacy of dihydroxamate siderophore in attenuation/mitigation of cadmium toxicity, an optimum level of cadmium under which cyanobacterium can grow and produce siderophore, complexation… Expand
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Phosphomonoesterase activity of the cyanobacterium (blue-green alga) Calothrix parietina.
Cellular and extracellular phosphomonoesterase activities were compared in Calothrix parietina D550, a strain whose original environment has been studied in detail. Activity in both fractions became… Expand
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Action of 2,4-Dichlorophenoxyacetic Acid onNostoc linckia: Impact of Glucose and Tryptophan
Abstract2,4-Dichlorophenoxyacetic acid (2,4-D) stimulated growth and heterocyst differen- tiation ofNostoc linckia in nitrogen-free medium at lower concentrations (100 μ.g/mL) while its higher… Expand
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The use of biofertilizer of Calothrix sp. M103, enhanced by addition of iron and siderophore production
Calothrix sp. M103, enhanced by addition of iron and siderophore production was used as a biofertilizer. The strain was isolated from a colony on the surface root of a rice plant from a rice field in… Expand
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Effect of tryptophan on 2,4‐dichlorophenoxyacetic acid toxicity in the nitrogen‐fixing‐cyanobacterium Nostoc linckia
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… Expand
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Toxicity of the herbicide Stam f-34 (propanil) on Nostoc calcicola
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Nitrogenase and Hydrogenase: Enzymes for Nitrogen Fixation and Hydrogen Production in Cyanobacteria
Abstract Cyanobacteria, one of the most ancient groups of oxygenic photoautotrophs are ubiquitously found in almost all habitats on earth. Under nitrogen limitation, some of the cyanobacteria have… Expand
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Use of cyanobacterial diazotrophic technology in rice agriculture
Diazotrophic cyanobacteria are photoautotrophic organisms that require sunlight as a sole energy source for the fixation of carbon and nitrogen. Therefore, they have great potential as… Expand
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The switch-on time of the phosphomonoesterase activity in relation to cellular phosphorus in six strains of blue-green algae (Cyanobacteria)
Abstract Cell-bound phosphomonoesterase (PMEase) activity in relation to cellular P was compared in six strains of blue-green algae. In all strains, cell-bound PMEase was detectable at a relatively… Expand
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