稻田恶性杂草千金子的抗药性研究进展

Herbicide resistance of Chinese sprangletop [Leptochloa chinensis(L.) Nees] in rice fields: a review

千金子为稻田恶性杂草,随着稻田免耕、直播技术的发展,千金子在稻田迅速蔓延,已成为稻田危害最严重的杂草之一,影响水稻产量和现代水稻轻型栽培技术的推广。随着稻田化学除草剂的常年使用,千金子对氰氟草酯等多种除草剂已产生抗药性。有研究表明,千金子对氰氟草酯产生的较高抗性与其靶标基因2027号和1999号位点突变有关。此外,千金子对除草剂代谢分解速率的快慢与其产生抗药性的程度也有着密切的关联。另有报道证实,谷胱甘肽S-转移酶活性的增强提高了千金子对除草剂的代谢。本文综述了国内外稻田千金子的抗药性现状和抗性的产生机制,简述了稻田千金子抗药性研究的重要性,并提出了抗性千金子治理策略,以期为抗性千金子的防治提供参考。

Chinese sprangletop[Leptochloa chinensis(L.)Nees]is one of the most serious weed in rice fields.After the development of no-tillage and direct-seeding technology,L.chinensis spread quickly and became a problem weed in the development and application of modern rice cultivation techniques.The problem of resistance has appeared with the continuous use of cyhalofop-butyl and other herbicides in paddy fields for many years.Studies have shown that the higher resistance of L.chinensis to cyhalofop-butyl was resulted from the target gene mutations at 2027 and 1999 loci.In addition,the degree of resistance was related to the herbicide metabolic.It has been reported that the increase of the activity of glutathione S-transferase could enhance the herbicide metabolism in L.chinensis.In this review,the status and mechanism of L.chinensis resistance have been summarized,and the resistance management strategies are proposed,which has provided references for the control and management of the resistance of L.chinensis.