Ảnh hưởng của một số yếu tố môi trường lên mật số dòng vi khuẩn Paracoccus sp. P23-7 phân hủy hoạt chất thuốc trừ sâu Propoxur phân lập từ nền đất bảo quản hành tím tại tỉnh Vĩnh Châu, Sóc Trăng

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Tác giả: Khởi Nghĩa Nguyễn, Thị Anh Thư Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 633.898 Insecticide-producing plants

Thông tin xuất bản: Khoa học và Công nghệ (Đại học Thái Nguyên), 2018

Mô tả vật lý: 85-90

Bộ sưu tập: Metadata

ID: 491216

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Ảnh hưởng của một số yếu tố môi trường lên mật số dòng vi khuẩn Paracoccus sp. P23-7 phân hủy hoạt chất thuốc trừ sâu Propoxur phân lập từ nền đất bảo quản hành tím tại tỉnh Vĩnh Châu, Sóc Trăng. Kết quả cho thấy dòng P23-7 có khả năng thích nghi tốt với các điều kiện bất lợi của môi trường và do đó có tiềm năng ứng dụng cao trong việc xử lý đất ô nhiễm với propoxur và đây được xem như giải pháp sinh học an toàn nhằm giải quyết tình trạng ô nhiễm môi trường đất và nước với thuốc bảo vệ thực vật tại huyện Vĩnh Châu, tỉnh Sóc Trăng.The aim of this study was to find out some environmental paramters optimizing for the cell growth of bacterial strain, Paracoccus sp. P23-7, the insecticide propoxur key degrader. This strain was isolated from the propoxur contaminated soils in a shallot storage house at Vinh Chau District, Soc Trang Province. The isolation step of bacteria from soil and other experiments regard to environmental factors optimizing the cell growth of bacteria including pH, temperature and NaCl concentration were conducted in the minimal salt medium containg propoxur as only carbon source for bacteria. Resutls showed that from propoxur contaminated soil the best bacterial strain, P23-7 was obtained and this strain degrading almost 100 % of the initial concentration of propoxur (45 ppm) in the liquid medium after 4 days of incubation was genetically identified as Paracoccus sp. P23-7. The best cell growth of this strain appeared to be pH 6.5 of the media and at both 30oC and 38oC. This strain was able to grow at all tested levels of NaCl, especially at 3% NaCl. In short, the Paracocus P23-7 strain with the capacity of fast growth and highly propoxur degrading capacity had a good adaptation with harzarous environmental conditions and potential application of this strain for bioremediation of pesticide contaminated soil and water at Vinh Chau district, Soc Trang province is high.

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