Enhanced Biodegradation of 2,3,4,5,6-pentachlorocyclohexan-1-ol - a β-HCH Metabolite - in the Presence of α- and γ-HCH Isomers by Pseudomonas aeruginosa ITRC-5

被引：0

作者：

Singh, Anita ^{[1
]}

Kumar, Ashwani ^{[1
]}

Misra, Krishna ^{[1
]}

机构：

[1] Rice Univ, Dept Biochem & Cell Biol, Houston, TX 77251 USA

来源：

CLEAN TECHNOLOGY 2009: BIOENERGY, RENEWABLES, STORAGE, GRID, WASTE AND SUSTAINABILITY | 2009年

关键词：

Pseudomonas aeruginosa ITRC-5; beta-Hexachlorocyclohexane; 2,3,4,5,6-pentachlorocyclohexan-1-ol; Biodegradation; HEXACHLOROCYCLOHEXANE ISOMERS; LIN GENES; DEGRADATION; RESIDUES; SOIL;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Chlorinated insecticide hexachlorocyclohexane (HCH), which is still used in many countries in agriculture and forestry, leads to environmental problems. HCH consists of a mixture of four isomers: alpha-, beta-, gamma-, and delta. A bacterium Pseudomonas aeruginosa ITRC-5 degrades not only alpha-, gamma-, and delta- HCH isomers but also beta-HCH which is the most recalcitrant due to its chemical stability. The degradation of beta-isomer is accompanied with the formation of a metabolite 2,3,4,5,6-pentachlorocyclohexan-1-ol (PCCOL). In the present study, effectiveness of ITRC-5 strain in further degradation of PCCOL was evaluated. gamma-HCH grown ITRC-5 cells show higher degradation of PCCOL than the t-HCH grown cells do. Furthermore, degradation of PCCOL by gamma-HCH grown cells is enhanced in the presence of alpha- or gamma-HCH isomers. Cloned genes of ITRC-5 bacterium showed 50% degradation of PCCOL in 16 hrs. The ITRC-5, therefore, demonstrates potential for the bioremediation of beta-HCH and PCCOL

引用

页码：290 / 293

页数：4