秸秆内丝状真菌阻止外源真菌入侵

Filamentous fungi in the stalks prevent other fungi penetrating

选取降解秸秆较快且形态差异较大的10株丝状真菌,以玉米秆芯为材料,研究其降解秸秆的协同性。结果表明:供试10株丝状真菌在侵入秸秆内部后都具有排斥其他丝状真菌侵入的倾向。利用平板对峙法研究这10株丝状真菌在培养基PDA上生长的相互影响,结果表明供试10株丝状真菌也普遍具有相互竞争和抑制的作用,没有发现促进生长现象。根据菌落形态、菌丝和孢子形态对10株丝状真菌进行了鉴定。在这10株真菌中,有3株(F1、F7、F10)是循环抑制,分类学上分别归属于Mucor lamprosporus lender,Neurospora sitophila Sh.Et dodge和Phytophthora cactorum(L.etC.)Schrot.。结论:侵入秸秆内10株丝状真菌阻止外源真菌入侵。

Cooperate in the degradation procedure in the core of the maize stalks between each 2 strains among 10 strains of filamentous fungi that could most effectively degrade stalks and colony morphologically different were studied. Results showed that each of the 10 filamentous fungi have the tendency to prevent other fungi penetrating into the space it already occupied. The method of two fungi grow on the medium of one plate were recruited in the study of the effects between each two strains among the 10 strains of fungi on the PDA medium. Results showed that competition and antagonism were seen between most of the 10 fungi, no growth acceleration were showed. The 10 strains of fungi were identified according the morphology of the colonies, the mycelium and the spores. Three （F 1, F7, F 10） of the 10 strains of fungi form an inhibition cycle, the three fungi taxonomically belong to Mucor lamprosporus lender, Neurospora sitophila Sh. Et dodge and Phytophthora cactorum（L, et C.） Schrot.. In conclusion, the 10 filamentous fungi in the stalks prevent other fungi penetrating.