Rhizosphere and Non-rhizosphere Fungal Communities of Dominant Plants in Inner Mongolia Desert Steppe
This study aims to explore the interrelationships among desert steppe plants,fungi,and soil and to understand the diversity of rhizosphere and non-rhizosphere soil fungi of dominant plants in the Inner Mongolia desert steppe and the driving factors behind the differences.High-throughput sequencing technology was employed to analyze the composition and diversity of fungal communities in rhizosphere and non-rhizosphere soils of constructive species Stipa breviflora and dominant species Artemisia frigida and Cleistogenes songorica in the Inner Mongolia desert steppe.The results showed that compared to non-rhizosphere soil,the S.breviflora rhizosphere soil had significantly decreased fungal diversity(P<0.05),while rhizosphere soils of A.frigida and C.songorica did not show significant changes in fungal diversity.A total of 5 phyla,26 classes,104 orders,268 families,and 661 genera were detected in the four groups of rhizosphere soil samples.At the phylum level,all the four groups included Basidiomycota(73.39%-94.43%),Ascomycota(3.33%-12.41%),Zygomycota(0.36%-1.45%),and Chytridiomycota(0.08%-1.59%).Additionally,Glomeromycota(0.6%)was detected in rhizosphere soil of S.breviflora.Cluster analysis at the genus level revealed that the fungal community composition of A.frigida and C.songorica rhizosphere was most similar.The abundance of fungal genera such as Inonotus,Coprinopsis,Bovista,Simocybe and Marasmius in S.breviflora rhizosphere soil was significantly higher than that of the other three groups.LEfSe analysis indicated that Inonotus was the key differential fungi of S.breviflora rhizosphere from the other groups.CCA demonstrated that soil pH and organic carbon were the primary environmental factors influencing fungal communities.
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