In addition to avermectins , s . avermitilis produces oligomycin , a strongly toxic compound . gene deletion vector pxl05 was used to disrupt oligomycin polyketide synthase ( pks ) encoding genes ( olma ) in streptomyces avermitilis cz8 - 73 , the producer of anthelmintic avermectins b and the cell growth inhibitor oligomycin . olma gene cluster in the chromosome was displaced by deletion allele on the plasmid via double crossover 本研究以产阿维菌素b和寡霉素的阿维链霉菌cz8 - 73为出发菌株，构建了基因缺失载体pxl05 ，并将其转入cz8 - 73中，通过缺失载体和染色体之间的同源双交换，对染色体上长达90kb的寡霉素聚酮合酶( pks )基因簇( olma )进行了缺失。
2.
In this paper , the important effect on the organisms life activities of plant essential oil as well as the terpenoids in it is described . it also introduces the researching progress of the plant essential oil in antiboisis , disinfection , mothkilling , anthelmintic action , insect killing , ovicidal action and its effect on the plants growth 论述了植物精油及其中所含的萜类化合物对生物的生命活动的重要作用.对植物精油在抗菌、杀菌、诱虫、驱虫、杀虫、杀卵和影响植物生长等方面的研究进展进行了介绍
3.
Avermectins are a series of 16 - membered macrocyclic lactones produced by streptomyces avermitilis with potent anthelmintic and insecticidal activity . they are the most effective agricultural pesticides and antiparasitic agents , and used widely in medical , veterinary and agricultural fields 阿维链霉菌( streptomycesavermitilis )产生的阿维菌素( avermectins )是一组高效、低毒、广谱的杀虫抗生素，在医药、农业和畜牧业生产中具有良好的应用价值和广阔的市场前景。
