米槁果实不同发育时期根际土壤可培养真菌的动态变化.

【Objective】 The dynamic changes of the fungal community composition in the rhizosphere soil at different development stages of Cinnamomum migao fruit are explored, which provides reference for the utilization of beneficial fungus in the rhizosphere soil of C. migao and the control of harmful microbes. 【Method】 Based on the method of combining morphology and molecular phylogeny analysis, the cultivable rhizosphere fungus of C. migao were isolated and identified. 【Result】 A total of 529 fungi were obtained, which were initially identified as 111 species in 57 genera, 35 families, 3 phyla. At the phylum level, the dominant fungi was Ascomycota; At the family level, the dominant fungi were Hypocreaceae and Phytobacteria; At the genus level, the dominant fungi were Trichoderma and Penicillium. There were some differences in the composition of fungal communities at the three stages. Among them, The fungi isolated and identified at the young fruit stage belonged to 31 genera and 53 species, the dominant genus was Nectria（11.90%）; The fungi isolated and identified at the swelling stage were 36 genera and 64 species, the dominant genus were Trichoderma（16.99%） and Penicillium（16.34%）; The fungi isolated and identified at maturity stage were 16 genera and 31 species, and the dominant genus was Trichoderma（41.90%）. The Shannon diversity index, Simpson index, Margalef index and Pielou index of the rhizosphere cultivable fungal community all showed as the swelling stage﹥ young fruit stage﹥ maturity stage. 【Conclusion】 The rhizosphere soil of C. migao had a rich diversity of cultivable fungi, and it at maturity stage was significantly lower than at the swelling stage and the young fruit stage. The pathogenic fungus Fusarium also had the same changing trend. It was speculated that because the pathogenic antagonist Trichoderma proliferates in large numbers during the fruit ripening stage, the further reproduction of Fusarium was inhibited. [ABSTRACT FROM AUTHOR]