Engineered endophytic bacteria improve phytoremediation of water-soluble, volatile, organic pollutants

被引:369
|
作者
Barac, T
Taghavi, S
Borremans, B
Provoost, A
Oeyen, L
Colpaert, JV
Vangronsveld, J
van der Lelie, D
机构
[1] Flemish Inst Technol Res, Environm Technol Expertise Ctr, B-2400 Mol, Belgium
[2] Limburgs Univ Ctr, Dept Environm Biol, B-3590 Diepenbeek, Belgium
[3] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA
关键词
D O I
10.1038/nbt960
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
Phytoremediation of highly water soluble and volatile organic xenobiotics is often inefficient because plants do not completely degrade these compounds through their rhizospheres. This results in phytotoxicity and/or volatilization of chemicals through the leaves, which can cause additional environmental problems. We demonstrate that endophytic bacteria equipped with the appropriate degradation pathway improve the in planta degradation of toluene. We introduced the pTOM toluene-degradation plasmid of Burkholderia cepacia G4 into B. cepacia L. S. 2.4, a natural endophyte of yellow lupine. After surface-sterilized lupine seeds were successfully inoculated with the recombinant strain, the engineered endophytic bacteria strongly degraded toluene, resulting in a marked decrease in its phytotoxicity, and a 50-70% reduction of its evapotranspiration through the leaves. This strategy promises to improve the efficiency of phytoremediating volatile organic contaminants.
引用
收藏
页码:583 / 588
页数:6
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