Plant compounds that induce polychlorinated biphenyl biodegradation by Arthrobacter sp. strain B1B

被引:159
作者
Gilbert, ES
Crowley, DE
机构
[1] UNIV CALIF RIVERSIDE, DEPT SOIL & ENVIRONM SCI, RIVERSIDE, CA 92521 USA
[2] UNIV CALIF RIVERSIDE, ENVIRONM TOXICOL GRAD PROGRAM, RIVERSIDE, CA 92521 USA
关键词
D O I
10.1128/AEM.63.5.1933-1938.1997
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Plant compounds that induced Arthrobacter sp, strain B1B to cometabolize polychlorinated biphenyls (PCBs) were identified by a screening assay based on the formation of a 4,4'-dichlorobiphenyl ring fission product, A chemical component of spearmint (Mentha spicata), l-carvone, induced Arthrobacter sp. strain BIB to cometabolize Aroclor 1242, resulting in significant degradation of 26 peaks in the mixture, including selected tetra- and pentachlorobiphenyls. Evidence for PCB biodegradation included peak disappearance, formation of a phenylhexadienoate ring fission product, and chlorobenzoate accumulation in the culture supernatant. Carvone was not utilized as a growth substrate and was toxic at concentrations of greater than 500 mg liter(-1) Several compounds structurally related to l-carvone, including limonene, p-cymene, and isoprene, also induced cometabolism of PCBs by Arthrobacer sp, strain B1B, A structure-activity analysis showed that chemicals with an unsaturated p-menthane structural motif promoted the strongest cometabolism activity. These data suggest that certain plant-derived terpenoids may be useful for promoting enhanced rates of PCB biodegradation by soil bacteria.
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页码:1933 / 1938
页数:6
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