| 摘要: |
| 以紫外线（λ=230-265nm）照射非致病尖孢镰刀菌316菌系，随着照射时间的增加，分生孢子的存活数逐渐减少，照射时间与存活菌株对农抗120和速克灵的变异频率间没有一定的相关性。对农抗120抗性增加的菌株仍保持316定殖西瓜幼苗导管的能力，对瓜苗的促生作用以及非致病性。在药板上用紫外线重复照射存活菌株后，获得的菌株对两种农药的变异频率均有提高，对农抗120的抗性有所下降，对速克灵的抗性显著提高。 |
| 关键词: 紫外线诱变，生物防治，非致病尖孢镰刀菌，抗药性 |
| DOI： |
| 分类号:S432 |
| 基金项目: |
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| Mutagenic Effect of UV Light on Nonpathogenic Fusarium oxysporum |
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| Abstract: |
| The strain 316 of nonpathogenic Fusarium oxysporum were irradiated on
PDA plate with UV light(230一265nm) at 32 cm distance.The survival number of
conidia decreased as time of irradiation incereased.There was no correlativity between the
lengths of treated time with UV light and the mutation frequency of survival strain to
Agricultural Antibiotic 120(AA120) and Sumilex.Nonpathogenic AA 120-resistant mutants still remained the colonization in the hypocotylar of watermelon seedlings and pro-
moted the growth of watermelon plant in the greenhouse experiment.The fungicides-resistant mutants were repeatedly irradiated on PDA containing AA 120 or sumilex with
UV light,the mutation frequency to the fungicides were increased.There was a slight
decrease in the resistance of mutants to AA 120,while a significant increase in the resistance to sumilex. |
| Key words: UV mutagenesis,biological control,nonpathogenic Fusarium oxysporum,fungicides resistance |
