Biodegradation of an s-triazine herbicide, simazine
Biodegradation of an s-triazine herbicide, simazine
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DOI：
10.1016/s1381-1177(00)00169-7
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发表时间：
2001-01-22
影响因子：
--
通讯作者：
Yajima, M
中科院分区：
文献类型：
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作者：
Kodama, T;Ding, LX;Yajima, M
从西马津作为唯一碳源和氮源的土壤样品中分离到两种西马津降解菌。经鉴定为链状青霉属(Penicillium Steckii)，为首次报道的西马津降解菌。在含有西马津(初始浓度：50 mg/L)和25 mg/L酵母膏的矿物质培养基中，西马津被链霉菌逐渐降解。添加可同化碳源可提高西马津的降解率，在30℃下培养5d，降解率可达53%。新分离的绵羊莫拉氏菌N5C对西马津的降解率高于菌株DS 6F，200 mg/L的西马津在35℃的降解率在5天内基本消失。(C)2001 Elsevier Science B.V.保留所有权利。
Two types of simazine-degrading microorganism were isolated from soil samples where the herbicide had been spread with the enrichment culture using simazine as the sole carbon and nitrogen source.A fungal strain, DS6F, identified as Penicillium steckii, is the first simazine-degrading fungus ever reported.Simazine was gradually degraded by P. steckii DS6F in the mineral medium containing simazine (initial concentration: 50 mg/l) and 25 mg/l of yeast extract. The rate of simazine degradation was improved when assimilable carbon sources were added into the medium, and the reduction rate of 53% was obtained after 5 days of cultivation at 30 degreesC when glucose was added into the basal medium.The bacterial strain, N5C, identified as Moraxella (Branhamella) ovis, was newly isolated and proven to degrade simazine more effectively than strain, DS6F, and 200 mg/l of simazine disappeared almost completely within 5 days at 35 degreesC.M. (Branhamella) ovis could also degrade another s-triazine herbicide, atrazine, at the similar reduction rate as simazine. (C) 2001 Elsevier Science B.V. All rights reserved.