Effect of Lindane on the Growth and Metabolic Activities Of Cyanobacteria

Babu, G. Suresh; Hans, R.K.; Singh, Jyotsna; Viswanathan, P. N.; Joshi, P. C.

doi:10.1006/eesa.2000.2033

Cited by 22 publications

(6 citation statements)

References 7 publications

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“…Although two previous studies on the effects of lindane on the growth of cyanobacteria (Bueno et al 2004;Suresh et al 2001) have shown that it does not inhibit the growth of some cyanobacteria, little Fig. 1 Changes in the chlorophyll a contents of Anabaena azotica exposed to lindane.…”

Section: Discussionmentioning

confidence: 96%

Characteristics of γ-hexachlorocyclohexane biodegradation by a nitrogen-fixing cyanobacterium, Anabaena azotica

Zhang

Jia

et al. 2011

J Appl Phycol

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Biodegradation of γ-hexachlorocyclohexane (lindane) by a nitrogen-fixing cyanobacterium isolated from Chinese paddy soils, Anabaena azotica 118, was investigated. Lindane with an initial concentration of 0.2 mg L −1 in the cultures had no negative effect on the chlorophyll a concentration of A. azotica after 5 d exposure. The tolerance of this cyanobacterium to lindane indicates that it has the potential to biodegrade lindane. The degradation experiments show that the percentage of lindane removal efficiency by A. azotica was 48.8% after 5 d, at an initial lindane concentration of 0.2 mg L −1 and initial A. azotica chlorophyll a concentration of 50 mg L −1 . The calculated half-life was 4.78 d. Elevated culture temperature, irradiation, and usage of nitrate as the nitrogen source in the cultures could increase the biodegradation efficiency of lindane. γ-Pentachlorocyclohexene was detected as a metabolite of lindane. The ability of A. azotica to biodegrade lindane has potential use in the bioremediation for this organochlorine pesticide.

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Section: Discussionmentioning

confidence: 96%

Characteristics of γ-hexachlorocyclohexane biodegradation by a nitrogen-fixing cyanobacterium, Anabaena azotica

Zhang

Jia

et al. 2011

J Appl Phycol

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“…It has been shown that ampicillin, atrazine and cadmium downregulate the transcription of microcystin synthesis gene clusters [ 12 ], demonstrating that the aforementioned antibiotics, herbicides and heavy metals affect microcystin levels. A review of the available literature shows ample data variations both in lindane tolerance and lindane degradation depending on the cyanobacterial strain used [ 6 , 11 , 13 , 14 ]. Lindane physiological effects on growth (decreased), photosynthesis (decreased) and oxidative metabolism (antioxidant defenses increased) have been described in non-toxic strains of Anabaena (PCC7120 [ 14 ] and in a strain isolated from paddy fields [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

γ-Lindane Increases Microcystin Synthesis in Microcystis aeruginosa PCC7806

et al. 2015

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HCH factories, and the waste dumpsites associated to its production, have become a global environmental concern, and their runoff could pollute ground and surface waters with high levels of the pollutant. In this study, the influence of lindane (γ-HCH) on microcystin production has been investigated in Microcystis aeruginosa PCC7806. This toxic cyanobacterium is highly tolerant to γ-lindane (20 mg/L), and produces more toxin (microcystin) in the presence of the pollutant. Microcystis degrades γ-lindane and presence of γ-lindane induces genes involved in its own degradation (nirA). RT-PCRsq has been used to monitor changes in levels of transcripts encoded by the mcy operon (mcyD, mcyH and mcyJ), responsible for the microcystin synthesis machinery, as well as other genes involved in its transcriptional regulation, such as ntcA and fur family members. The presence of lindane in the culture media induces mcyD expression, as well as ntcA gene transcription, while other genes, such as mcyH, (putative ABC transporter), are downregulated. The amount of microcystin found in the cells and the culture media is higher when M. aeruginosa is treated with γ-lindane than in control cells. The results suggest that in a lindane polluted environment, Microcystis toxic strains may enhance their microcystin synthesis.

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“…(2008) in nitrogen-fixing cyanobacteria when treated with endosulfan . Protein content fluctuated from 1.44 mgmL −15 to 3.78 mgmL −15 and was inhibited by 46%, 13% and 67% on the 12 th day ( Figure 6b ) and 70%, 48% and 81% after the 16 th day, significantly at 1%, 3% and 5%, respectively, of kerosene-treated P. janthinellum SDX7 isolate as shown by Babu et al (2001) and Laxmi et al (2007) in response to lindane and organophosphorus on certain cyanobacterial species. At the end of the experiment after the 16 th day, the highest reduction of amino acids in P. janthinellum SDX7 (by 95%) was observed when treated with 5% kerosene relative to the control, which ranged from 0.05 mgmL −15 to 0.4 mgmL −15 ( Figure 6c ).…”

Section: Resultsmentioning

confidence: 64%

Biodegradation of kerosene: Study of growth optimization and metabolic fate of P. janthinellum SDX7

Khan¹,

Nirmal²,

Kumar³

et al. 2015

Braz. J. Microbiol.

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Penicillum janthinellum SDX7 was isolated from aged petroleum hydrocarbon-affected soil at the site of Anand, Gujarat, India, and was tested for different pH, temperature, agitation and concentrations for optimal growth of the isolate that was capable of degrading upto 95%, 63% and 58% of 1%, 3% and 5% kerosene, respectively, after a period of 16 days, at optimal growth conditions of pH 6.0, 30 °C and 180 rpm agitation. The GC/MS chromatograms revealed that then-alkane fractions are easily degraded; however, the rate might be lower for branched alkanes, n-alkylaromatics, cyclic alkanes and polynuclear aromatics. The test doses caused a concentration-dependent depletion of carbohydrates of P. janthinellum SDX7 by 3% to 80%, proteins by 4% to 81% and amino acids by 8% to 95% upto 16 days of treatment. The optimal concentration of 3% kerosene resulted in the least reduction of the metabolites of P. janthinellum such as carbohydrates, proteins and amino acids with optimal growth compared to 5% and 1% (v/v) kerosene doses on the 12th and 16th day of exposure. Phenols were found to be mounted by 43% to 66% at lower and higher concentrations during the experimental period. Fungal isolate P. janthinellum SDX7 was also tested for growth on various xenobiotic compounds.

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Effect of Lindane on the Growth and Metabolic Activities Of Cyanobacteria

Cited by 22 publications

References 7 publications

Characteristics of γ-hexachlorocyclohexane biodegradation by a nitrogen-fixing cyanobacterium, Anabaena azotica

Characteristics of γ-hexachlorocyclohexane biodegradation by a nitrogen-fixing cyanobacterium, Anabaena azotica

γ-Lindane Increases Microcystin Synthesis in Microcystis aeruginosa PCC7806

Biodegradation of kerosene: Study of growth optimization and metabolic fate of P. janthinellum SDX7

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