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在温室盆栽条件下研究了丛枝菌根 ( Arbuscular Mycorrhiza,AM)真菌 Gigaspora roseaNicol.& Schenck、Glomus mosseae( Nicol.& Gerd.) Gerdemann & Trappe和 Glomus versiforme( Karsten) Berch与西瓜枯萎病菌 ( Fusarium oxysporum f.sp.niveum)的关系。结果表明 ,接种 AM真菌能促进西瓜植株的生长发育 ,增加植株干重 ;显著减少根内和根围土壤中镰刀菌群体数量及其对根系的侵染率 ;降低枯萎病发病率和病情指数 ,从而减轻西瓜枯萎病的危害。接种 F.oxysporum f.sp.niveum能降低 AM真菌对西瓜的侵染率 ,并且 AM真菌与镰刀菌的不同接种时间和顺序影响西瓜枯萎病的发生发展 ,证实 AM真菌与镰刀菌存在竞争关系。另外 ,AM真菌对西瓜高感枯萎病品种的防治效果优于抗病品种 ,说明高感品种对菌根的依赖性较大
The effects of arbuscular mycorrhizal fungi Gigaspora roseaNicol. & Schenck, Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe and Glomus versiforme (Karsten) Berch on Fusarium oxysporum f.sp.niveum) relationship. The results showed that inoculation of AM fungi could promote the growth and development of watermelon plants, increase the dry weight of the plants, significantly reduce the population of Fusarium and the infection rate of the root system in roots and rhizosphere soils, reduce the incidence of Fusarium wilt and disease index, Thus reducing the watermelon wilt disease hazards. Inoculation of F. oxysporum f.sp.niveum could reduce the infection rate of AM fungi to watermelon, and the different inoculation time and sequence of AM fungi and Fusarium affected the occurrence and development of Fusarium oxysporum f. Sp., Confirming the competing relationship between AM fungi and Fusarium. In addition, AM fungi on the watermelon high resistance to fusarium wilt disease control effect is superior to disease-resistant varieties, indicating that high susceptibility to mycorrhizal more dependent