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木霉对棉花枯萎病菌(Fusariumoxysporumf.sp.Vasinfectum)的幼菌丝具有强烈的寄生能力,对于老熟菌丝的寄生能力较弱。木霉能够产生琼脂扩散性和挥发性抑菌物质,绿色木霉LTR2产生的挥发性抑菌物质能强烈抑制棉花枯萎病菌的菌丝生长。木霉生物防治作用的另外一种方式是与病原菌竞争营养物质,研究发现葡萄糖是竞争对象之一。木霉具有很强的β1,3葡聚糖酶和几丁质酶活性。培养液中添加几丁质、木霉菌或者棉花枯萎病菌菌丝干粉后培养木霉,培养液上清能够破坏枯萎病菌的菌丝尖端并导致原生质体的泄露,该现象主要与木霉的几丁质酶活性有关。木霉对棉花黄萎病菌具有相同的作用方式。
Trichoderma has strong parasitism on the mycelium of Fusarium oxysporum f.sp.Vasinfectum and less parasitism to mature hyphae. Trichoderma can produce agar-diffusing and volatile bacteriostatic substances, and the virulent bacteriostatic substances produced by Trichoderma viride LTR2 can strongly inhibit mycelial growth of Fusarium oxysporum f. Trichoderma biological control of another way is to compete with pathogens nutrients, studies have found that glucose is one of the competition. Trichoderma has a strong β1,3 glucanase and chitinase activity. Trichoderma were cultured in the culture medium supplemented with chitin, Trichoderma or Fusarium oxysporum mycelium dry powder, and the supernatant of the culture liquid could destroy the mycelial tip of Fusarium oxysporum and cause the leakage of protoplasts, which is mainly related to the chitin The enzyme activity related. Trichoderma has the same mode of action against Verticillium dahliae.