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Enumeration and characterization of microorganisms in raw coir pith and coir pith dumped soil

100%

Paramanandham J., Ross P. R.

International Letters of Natural Sciences

2016

tom 53

Coir pith is being considered as the reject generated during the extraction of coir fibre from coconut husks. It is a light weight and fluffy material with dusts and bits of fibres. The coir pith has many undesirable components and hence it does not carry any value addition. It needs to be degraded for the effective utilization for further activities. Microbes have the ability to decompose coir pith. Coir pith itself posses its own native microbes. Hence in the present study, raw coir pith and the soil dumped with coir pith in the dumping yards along the vicinity of the coir fibre factories were subjected for the enumeration and characterization of microorganisms. The coir pith for the study was collected from two locations in Cuddalore District. The results exhibited the presence of huge quantity of microbes in the raw coir pith than the coir pith dumped soil. Furthermore, the percentage occurrence of bacteria was significantly higher when compared with that of the fungi and actinomycetes. Totally 12 species of bacteria, six species of fungi and three species of actinomycetes were recorded. The results showed significant variation in the quantity and quality of the microbes.

Biodegradation of carbendazim by epiphytic and neustonic bacteria of eutrophic Chelmzynskie Lake

72%

Kalwasinska A., Kesy J., Donderski W.

Polish Journal of Microbiology

2008

tom 57

nr 3

The paper presents a study on biodegradation of carbendazim (1 mg/l) by homogeneous cultures of epiphytic (n = 25) and neustonic (n = 25) bacteria and heterogeneous (n= 1) cultures containing a mixture of 25 bacterial strains isolated from epidermis of the Common Reed (Phragmites australis, (Cav.) Trin. ex Steud.) and surface microlayer (SM ≈ 250 μm) of eutrophic lake Chelmzynskie. Results indicate that epiphytic bacteria are characterized by higher average capacity to decompose carbendazim than neustonic bacteria (p<0.05). The half-life of carbendazim in epiphytic bacterial cultures equaled an average of 60 days. In the same period, neustonic bacteria reduced the concentration of the fungicide by 31 %. The level of carbendazim biodegradation in mixed cultures of epiphytic and neustonic bacteria after 20-day incubation was lower than the biodegradation level in homogeneous cultures. Sixty-day homogeneous cultures of epiphytic and neustonic bacteria were characterized by a higher mean level of carbendazim biodegradation than mixed cultures. After 40-day incubation, mean values of biodegradation of the fungicide in homogeneous and mixed cultures were similar. It was demonstrated that among epiphytic bacteria, Pseutlomonas luteola was the most efficient organism in reducing the concentration of carbendazim. Among neustonic bacteria, Burkholderia cepacia and Aeromonas hydrophila were the most effective in degradation of the fungicide.

Ograniczanie wyników

1 International Letters of Natural Sciences

1 Polish Journal of Microbiology

1 Donderski W.

1 Kalwasinska A.

1 Kesy J.

1 Paramanandham J.

1 Ross P. R.

1 2016

1 2008

Wyniki wyszukiwania

Enumeration and characterization of microorganisms in raw coir pith and coir pith dumped soil

Biodegradation of carbendazim by epiphytic and neustonic bacteria of eutrophic Chelmzynskie Lake