Year: 2018 | Month: June | Volume 11 | Issue 3
Biodegradation of Pyrethroid-Cypermethrin using Pseudomonas aeruginosa and Detection of its Plant Growth Promoting Properties
DOI:10.30954/0974-1712.06.2018.18
Abstract:
Pyrethroids are the botanical origin pesticides commonly used in agriculture for fruit and vegetable protection against various pests. Cypermethrin belongs to fourth generation of pyrethroids which are effective at very low concentration. Cypermethrin has beneficial effects but at the same time shows toxicity to aquatic life, carcinogenicity to human beings. Different methods are available to remove the cypermethrin pesticides from the soil but these methods are expensive and time consuming. So, the focus of this paper is on degradation of this pesticide by using soil microorganisms. For this, microorganisms were isolated from soil and identified by 16S rRNA sequencing. The isolate P. aeruginosan showed tolerance up to 200mg/lit cypermethrin concentration. COD value was found to be decreased up to 67.74% and 77.47% after 14 days of incubation and at 100mg/lit and 150mg/lit cypermethrin concentration resp. GCMS analysis showed presence of degradation metabolites indicating cypermethrin degradation capacity of P. aeruginosa. P. aeruginosa also showed plant growth promoting activity indicated by ability of nitrogen fixation, siderophore production, HCN production and IAA production. Thus, the isolate P. aeruginosa might have a potential in terms of cypermethrin degradation up to 200mg/lit concentration and plant growth promotion.
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