Atrazine and terbuthylazine mineralization by an Arthrobacter

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• 作者：Zachary Getenga ; Ulrike Dö ; rfler ; Azuka Iwobi ; Michael Schmid ; Reiner Schroll
• 关键词：Atrazine ; Terbuthylazine ; Mineralization ; Arthrobacter sp. ; Tropical soil
• 刊名：Chemosphere
• 出版年：2009
• 出版时间：October 2009
• 年：2009
• 卷：77
• 期：4
• 页码：534-539
• 全文大小：244 K

文摘

A tropical soil from a Kenyan sugarcane-cultivated field showed a very high capability to mineralize ¹⁴C-ring-labeled atrazine. In laboratory experiments this soil mineralized about 90 % of the applied atrazine within 98 d. The atrazine-degrading microbial community was enriched in liquid cultures containing atrazine as the sole N source and 100 mg L⁻¹ glucose as additional C source. From the enrichment culture a bacterial strain was isolated and identified by comparative sequence analysis of the 16S-rDNA as member of the genus Arthrobacter. The enriched mixed culture as well as the isolated strain, designated as Arthrobacter sp. strain GZK-1, could grow on atrazine and terbuthylazine as sole N-sources; Arthrobacter sp. GZK-1 mineralized ¹⁴C-ring-labeled atrazine up to 88 % to ¹⁴CO₂ and ¹⁴C-ring-labeled terbuthylazine up to 65 % to ¹⁴CO₂ in a liquid culture within 14 d. The enriched microbial consortium as well as the isolated strain could be a potential solution for the remediation of s-triazine polluted agricultural soils.