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OALib Journal期刊
ISSN: 2333-9721
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氯代酰胺类除草剂降解菌的分离及降解性能
DOI: 10.3724/SP.J.1145.2011.00711, PP. 711-716
Keywords: 酰胺类除草剂,乙草胺,副球菌,生物降解,降解特性
Abstract:
从生产乙草胺的农药厂废水生物处理池活性污泥中分离到一株氯代酰胺类除草剂降解细菌，命名为y3b-1.根据表型特征、生理生化特性和16srdna序列系统发育分析，将其鉴定为副球菌属（paracoccussp.）.研究了菌株y3b-1在不同条件下对多种氯代酰胺类除草剂的降解性能.结果表明：菌株y3b-1能以乙草胺为碳源生长，并能降解乙草胺、丁草胺和丙草胺，3d对这3种氯代酰胺类除草剂的降解率分别达到86.7%、65.5%和69.1%，不能降解异丙甲草胺.该菌降解乙草胺的最适温度为30℃，最适ph为7.0，对乙草胺的降解效果与接种量成正相关，对较低浓度的乙草胺有很好的降解效果，过高的起始浓度抑制其对乙草胺的降解，外加营养如酵母膏和土壤悬液则显著促进其对乙草胺的降解.图7参23
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