Effects of Water Logging Stress on Fungal Diversity, Community Structure and Functional Composition in Rhizosphere Soils of Simmondsia chinensis Seedlings
In order to understand changing laws of fungal communities in rhizosphere soils of Simmondsia chi-nensis under water logging stress, 70％ of field capacity was used as control (CK), and mild, moderate and se-vere water logging stress treatments were set up. Two-month-old S. chinensis seedlings were subjected to 7 days of water logging stress. Diversities, community structures and functional compositions of fungi in rhizo-sphere soils of S. chinensis seedlings in different water logging stress treatments were analyzed using high-throughput sequencing technology. Results showed that dominant fungi in rhizosphere soils of S. chinensis seed-lings were Ascomycota, Basidiomycota, Mortierellomycota, and Chytridiomycota. Diversities and richness of fun-gi in rhizosphere soils in mild and moderate water logging stress treatments did not significantly differ from CK , while diversities and richness of fungi in rhizosphere soils in severe water logging stress treatment were signifi-cantly higher than those of other treatments. Results of NMDS and PCA analysis indicated that community structures and functional compositions of fungi in rhizosphere soils in mild and moderate water logging stress treatments were similar, which in severe water logging stress treatment showed significant differences from oth-er treatments. Saprotroph fungi dominated in fungal communities in rhizosphere soils in different water logging stress treatments. When S. chinensis was cultivated in southern China, water logging should be avoided during seedling stage. Comprehensive management should be implemented combining other cultivation and control measures to prevent occurrence and spread of diseases.
water logging stressrhizosphere soilcommunity structure of fungalfunctional compositionSimmondsia chinensis
万方数据
维普
