柳树化感活性根际细菌对萘和蒽的生物降解。
Biodegradation of naphthalene and anthracene by chemo-tactically active rhizobacteria of populus deltoides.
机构信息
Department of Microbiology, S.B.S (P.G.) Institute of Biomedical Sciences and Research , Balawala, Dehradun, Uttarakhand , India.
出版信息
Braz J Microbiol. 2010 Oct;41(4):922-30. doi: 10.1590/S1517-838220100004000011. Epub 2010 Dec 1.
Several naphthalene and anthracene degrading bacteria were isolated from rhizosphere of Populus deltoides, which were growing in non-contaminated soil. Among these, four isolates, i.e. Kurthia sp., Micrococcus varians, Deinococcus radiodurans and Bacillus circulans utilized chrysene, benzene, toluene and xylene, in addition to anthracene and naphthalene. Kurthia sp and B. circulans showed positive chemotactic response for naphthalene and anthracene. The mean growth rate constant (K) of isolates were found to increase with successive increase in substrate concentration (0.5 to 1.0 mg/50ml). B. circulans SBA12 and Kurthia SBA4 degraded 87.5% and 86.6% of anthracene while, Kurthia sp. SBA4, B. circulans SBA12, and M. varians SBA8 degraded 85.3 %, 95.8 % and 86.8 % of naphthalene respectively after 6 days of incubation as determined by HPLC analysis.
从生长在无污染土壤中的柳树根际土壤中分离到几种降解萘和蒽的细菌。其中，有 4 种分离物，即 Kurthia sp.、微球菌变种、耐辐射球菌和环状芽孢杆菌，除了蒽和萘之外，还利用苯、甲苯和二甲苯。Kurthia sp 和 B. circulans 对萘和蒽表现出正趋化反应。发现分离物的平均生长速率常数（K）随着底物浓度（0.5 至 1.0 mg/50ml）的连续增加而增加。B. circulans SBA12 和 Kurthia SBA4 分别降解了 87.5%和 86.6%的蒽，而 Kurthia sp. SBA4、B. circulans SBA12 和 M. varians SBA8 在 6 天的培养后分别降解了 85.3%、95.8%和 86.8%的萘，这是通过 HPLC 分析确定的。
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