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Sensitivity of Four Yeasts to Fungicides and CO2 Concentrations and Their Antagonistic Ability in Combination with Fungicide to Pathogenic Fungi in vitro

机译:四种酵母对杀菌剂和CO2浓度的敏感性及其与杀菌剂联合对病原真菌的拮抗能力

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摘要

The yeasts Cryptococcus laurentii, Trichosporon pullulans, Rhodotorula glutinis and Trichosporon sp. were used to investigate their sensitivity to four fungicides and different concentrations of C0_2, as well as their antagonistic ability to Penicillium expansion and Alternaria alternata in vitro when applied with fungicide. There were significant differences in sensitivity to the fungicides among the different yeasts(P = 0.05) . R. glutinis was more sensitive to Deccocil, Iprodione and Stroby as compared to other yeasts. Combination antagonistic yeasts with fungicide could more significantly enhance biocontrol ability of the yeasts against the pathogenic fungi in vitro (P = 0.05). C. laurentii was the most, effective antagonist among the four yeasts and could completely control spore germination of P.expansion and A.alternata when combined with Stroby at the concentration of 100 mu L~(-1). The yeasts, except R.glutinis, could grow well on nutrient yeast dextrose agar (NYDA) after 8 d incubation even at 20% CO_2 concentration at 25 deg C. Particularly Trichosporon sp. showeda better adaptability to low temperature as compared to other antagonists.
机译:酵母劳氏隐球菌,Trichosporon pullulans,Rhodotorula glutinis和Trichosporon sp。分别研究了它们对四种杀菌剂和不同浓度的C0_2的敏感性,以及它们在体外与杀真菌剂对青霉菌扩张和链格孢菌的拮抗能力。不同酵母菌对杀菌剂的敏感性差异有统计学意义(P = 0.05)。与其他酵母菌相比,R.glutinis对Deccocil,Iprodione和Stroby更为敏感。拮抗性酵母菌与杀真菌剂的组合可以在体外显着增强酵母菌对病原真菌的生物防治能力(P = 0.05)。在四种酵母中,劳伦梭菌是最有效的拮抗剂,当与浓度为100μL〜(-1)的Stroby结合使用时,可以完全控制膨胀假单胞菌和另类曲霉的孢子萌发。除R.glutinis外,酵母在8 d孵育后在营养酵母葡萄糖琼脂(NYDA)上也能良好生长,即使在25°C下20%CO_2浓度也是如此。特别是Trichosporon sp.。与其他拮抗剂相比,对低温具有更好的适应性。

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