三酮类除草剂微生物降解的研究进展

Research progress in microbial degradation of triketone herbicides

摘要:

三酮类除草剂是一类高效、广谱、高选择性的除草剂，能够有效地防除玉米地多种阔叶杂草和禾本科杂草。该类除草剂在土壤、水体中残留，易造成地表和地下水污染。有关研究表明，微生物降解有望成为解决该类除草剂残留的有效措施。本文分析了2种三酮类除草剂带来的生态效应，总结了已报道的微生物降解资源，简述了降解基因/酶的研究进展及可能的降解途径，为深入研究三酮类除草剂的生物降解提供一定的信息支撑。

关键词:三酮类除草剂;对羟基苯基丙酮酸双氧化酶;生态效应;微生物降解

Abstract:

Triketone herbicides with high efficiency, broad spectrum, and high selectivity can effectively control a variety of broadleaf weeds and gramineous weeds in maize fields. The residues of the herbicides in soil and water are easy to cause surface and ground water pollution. Studies have indicated that microbial degradation is expected to be an effective measure to solve herbicide residues. In this paper, we analyzed the ecological effects of two triketone herbicides, summarized the reported microbial resources for residue degradation, and briefed the research progress in the degradation genes/enzymes and possible degradation ways, aiming to provide information support for further research on the biodegradation of triketone herbicides.

Key words:triketone herbicides;p-hydroxyphenylpyruvate dioxygenase;ecological effect;microbial degradation