Cyanobacteria and pesticides

Padhy, Rabindra N.

doi:10.1007/978-1-4612-5132-3_1

Cited by 45 publications

(33 citation statements)

References 81 publications

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“…2003;Chesworth et al 2004). Pesticide pollution can damage a wide variety of organisms as they persist in the ecosystem (Padhy 1985). Therefore, it was considered important to study the effects of these compounds on aquatic organisms.…”

Section: Introductionmentioning

confidence: 99%

Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

et al. 2012

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A microcosm experiment was used to examine the response of nematode in terms of density and diversity at different levels of permethrin contamination. The sediments were contaminated with three permethrin concentrations [P1: low (5 mg kg −1 ), P2: medium (25 mg kg −1 ) and P3: high (250 mg kg −1 )] and the effects were evaluated after 30 days. The results from univariate and multivariate analyses showed significant differences between nematode assemblages from uncontaminated control and those from permethrin treatments. All univariate indices changed significantly at all the levels of permethrin contamination. In fact, the total nematode abundance (I), Shannon-Weaner index (H ), species richness (d), evenness (J ) and number of species (S) decreased significantly in all the contaminated microcosms. In addition, the results from multivariate analyses of the species abundance data demonstrated that permethrin affects the responses of nematode species. These significant modifications in nematode community structures with response to permethrin contamination were the consequences of a different specific tolerance to this pesticide. Thus, Araeolaimus bioculatus, Calomicrolaimus honestus, Oncholaimus campylocercoides and Theristus pertenuis characterized by increased abundances in all treated replicates, appeared to be "permethrin-resistant" species. Daptonema trabeculosum was eliminated in all the doses tested and seemed to be a very sensitive species to permethrin contamination.

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Section: Introductionmentioning

confidence: 99%

Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

et al. 2012

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“…suggested that decrease in chlorophyll-a, carotenoid and phycobiliprotein contents might be ascribed to the inhibition of pigment synthesis directly by the insecticide or accelerated degradation of pigments due to increased Active Oxygen Species (AOS ) formation at various sites of the photosynthetic electron transport chain during stress. The retardation in the carbohydrate content might be due to interference of chemicals with photosynthesis process (Padhy, 1985). Nirmal Kumar (1991) reported the inhibition of sugar contents of the algae by accelerating doses of substituted urea herbicide N-(4-isopopylphenyl) N, N-dimethyl urea and stated that this retardation might be due to the interference of chemicals during photosynthetic process, which ultimately lapse the production of net gain of carbohydrates.…”

Section: Discussionmentioning

confidence: 99%

Fluoranthene induced changes in photosynthetic pigments, biochemical compounds and enzymatic activities in two microalgal species: Chlorella vulgaris Beijerinck and Desmodesmus subspicatus Chodat

Patel¹,

Kumar²,

Tiwari³

2014

Int. J. Environ.

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The photosynthetic pigments, biochemical and enzymatic activities in two freshwater microalgal species, Chlorella vulgaris and Desmodesmus subspicatus at different fluoranthene concentrations were compared with the control conditions. During 16-days of incubation period when treated with fluoranthene, both microalgal species exhibited variable amount of photosynthetic pigment, biochemical compounds and enzymatic activities. The addition of fluoranthene at concentrations ranged from 1.5 mg l¯¹ to 10 mg l¯¹ to microalgal cultures led to changes in all different metabolites but the patterns varied from species to species. Among the two species tested, pigment, biochemical and enzymatic contents were remarkably declined from 7 % to 95% in C. vulgaris. Moreover, all metabolites in D. subspicatus also diminishing significantly by 3% to 88% of fluoranthene doses (10ppm). These results suggest that fluoranthene-induced changes of pigments, biochemical and enzymatic variations in test microalgae, D. subspicatus and C. vulgaris, might reveal its resistance and ability to metabolize PAHs. At the same time, the PAH impact changes on different metabolic activities were higher at 12 and 16 days than at 4 and 8 days in treated microalgae.

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“…The retardation of carbohydrate content might be due to the interference of chemicals with the photosynthesis process (Padhy et al, 1985). Significant reduction in carbohydrates of Synechocystis sp., A.fertilissima and N.muscorum was observed with increasing concentrations of anthracene (Fig.…”

Section: Biochemical Metabolitesmentioning

confidence: 99%

Consequences of Environmentally Hazardous Polycyclic Aromatic Hydrocarbon- Anthracene Treatment on Cyanobacteria

Patel¹,

Kumar²,

Khan³

2015

Int J Appl Sci Biotechnol

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The study was aimed to determine the chronic toxicity of Polynuclear aromatic hydrocarbon – Anthracene in response to pigments and metabolic study on three different cyanobacterial species such as Synechocystis sp., Anabaena fertilissima, and Nostoc muscorum. Test organisms were treated at different doses and encountered LC50/Mean Lethal Concentration (at which 50% lethality/ growth reduction occur) separately at 7.0 ppm for Synechocystis sp, 5.0 ppm for Anabaena fertilissima and 1.5 ppm for Nostoc muscorum. The influence of anthracene on pigments, metabolites and enzymes was carried out. The test doses caused concentration dependent and decreased pigments like carotenoids and phycobilliproteins. Depletion of carbohydrate by 65 to 80% and proteins by 58 to 78% was encountered with rise in Anthracene concentrations after 16th day exposure in case of Synechocystis sp however, phenols were found to raise by 26 to 37% with increased anthracene concentrations. Similar trend also observed in other two tested blue green algae. Thus the Synechocystis sp.is more tolerant to anthracene treatments as compare to Anabaena fertillissima but Nostoc muscorum showed highest sensitivity to anthracene.Int J Appl Sci Biotechnol, Vol 3(3): 381-386

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Cyanobacteria and pesticides

Cited by 45 publications

References 81 publications

Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

Impacts of permethrin contamination on nematode density and diversity: A microcosm study on benthic meiofauna from a Mediterranean coastal lagoon

Fluoranthene induced changes in photosynthetic pigments, biochemical compounds and enzymatic activities in two microalgal species: Chlorella vulgaris Beijerinck and Desmodesmus subspicatus Chodat

Consequences of Environmentally Hazardous Polycyclic Aromatic Hydrocarbon- Anthracene Treatment on Cyanobacteria

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