植物内生真菌镰刀菌对马铃薯晚疫病菌的抑制研究*

 鉴定了分离自7种植物上的11株内生真菌镰刀菌并研究了它们对马铃薯晚疫病菌的抑菌活性。对峙培养试验表明：11株内生真菌镰刀菌对该病菌均有抑制作用,其中菌株e060-1, e060-3,e060-4的抑制率达50%以上。这些内生真菌镰刀菌的毒素粗提液对该病菌菌丝生长有更明显的抑制作用,其中e012-3,e060-4和e032毒素粗提液的抑菌率达100%。毒素粗提液能明显抑制晚疫病菌孢子对离体叶片的侵染,其中菌株e032毒素粗提液的抑制率达971%。

Inhibition Effect of Plant Endophytic Fusarium spp. on Phytophthora infestans

Eleven strains of endophytic Fusarium spp. isolated from 7 kinds of healthy plants were identified.And the inhibitory activities of these endophytic Fusariumspp. against Phytophthora infestans were tested.All these strains showed a certain degree inhibitory effects on the hypha growth of P. infestans by dual culture. The inhibition rates of strains e060-1,e060-3 and e060-4 were above 50%.The inhibitory effects of unrefined toxin extracts obtained from endophytic Fusariumspp. were more significant against hypha growth of P. infestans. The inhibitory rates of unrefined toxin extracts of e012-3, e060-4 and e032 were up to 100%. The unrefined toxin extracts of endophytic Fusariumalso inhibited the infection of P. infestans spore to detached leaves. The unrefined toxin extract of strain e032 had the best inhibitory effects at the inhibitory rate of 97.1%.