紫外光诱导哈茨木霉产生对多菌灵抗药性的菌株  被引量:14

Carbendazim Resistance Strains from Trichoderma Harzianum Induced by UV-light

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作  者:田连生[1] 

机构地区:[1]河北省生物研究所,河北石家庄050081

出  处:《农业环境科学学报》2007年第1期318-321,共4页Journal of Agro-Environment Science

基  金:河北省科技攻关项目(02245504D)

摘  要:在含多菌灵药物培养基上,采用紫外光重复诱导处理的方法,对拮抗性哈茨木霉T24进行改良,选育出对多菌灵具有显著耐药性的菌株T24-4和T24-6。结果表明,多菌灵浓度为300mg·L-1时,对突变菌株T24-4和T24-6的抑制率分别为9.4%和3.0%,同时两菌株对速克灵和甲基托布津也有交互抗性。经过菌和药协同作用研究发现:木霉菌T24-6菌剂与多菌灵重量配比为8∶2时,协同抑菌率高达85.0%,明显高于分别单独使用T24-6和多菌灵的抑菌率(70.3%和69.6%)。分别用菌和药,药,菌1000倍稀释液进行草莓活体拮抗性测定,其对草莓灰霉病的防治效果分别为83.9%、67.9%和64.2%,进一步表明菌和药协同作用效果优势更明显。在使用木霉T24-6菌剂防治农作物病害时,添加少量的多菌灵,可降低植物病原菌的活性和侵染力,从而提高生防效果。To realize beneficial interaction of biopestieide and chemical pesticide, the resistant Trichoderma harzianum strain T24-6 against Carbendazim was obtained by UV-ligbt repeatedly inducing and Carbendazim stress on PDA medium. The inhibition rate of Carbendazim to T24-6 was 3.0% when Carbendazim concentration was 300 mg·L^-1. Five treatments, Trichoderma, Carbendazim, three combinations of Trichoderma and Carbendazim with different weight rates 9:1, 8:2 and 7:3 respectively, were designed in the experiment. In every treatment, the inhibition rate and the antagonism of vivo-strawberry were tested. The inhibition efficiency of Botrytis einerea was 85% under the treatment with application of Trichoderma and Carbendazim at 8:2, higher than that in the treatment of applying Triehoderma T24-6 (70.3%) and Carbendazim(69.6%) separately. Similarly, the efficiency of controlling strawberry mold disease caused by Botrytis einerea was 83.9% by application of Trichoderma and Carbendazim at 8:2. The controlling effect was also better than the treatment of Trichoderma(67.9%) and Carbendazim (64.2%) separately. These results further demonstrated that the beneficial interaction of Trichoderma and Carbendazim was more advantageous. So, when using Trichoderma strain T24-6 to prevent and control crop diseases, adding a small amount of Carbendazim not only reduce the activity and ability of infection of plant pathogens but also improve the effects of biological control.

关 键 词:紫外光诱导 哈茨木霉 耐药性 拮抗性 

分 类 号:X172[环境科学与工程—环境科学]

 

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