Research on diversity of fungi community in rhizosphere soil of six halophytes in Ebinur Lake Wetland

Abstract:

[Objective] By studying the diversity and community structure of fungi in the rhizosphere soil of different halophytes in the Ebinur Lake wetland in Xinjiang, we provide theoretical support for the degradation and restoration of the Ebinur Lake wetland and the in-depth study of fungi. [Methods] We used high-throughput sequencing technology to determine the fungal amplicon ITS1 region to analyze the fungal community diversity in the rhizosphere soil of six halophytes in the Ebinur Lake Wetland, and combined with the relevant soil physical and chemical factors to analyze the relationship between the environment and the diversity and richness of fungal communities. [Results] The diversity and richness of fungal communities in the rhizosphere soil of the six halophytes in Ebinur Lake wetland were different. The fungi in the rhizosphere of Suaeda glauca had the highest diversity and the fungi in the rhizosphere of Phragmites australis had the highest richness. The analysis of fungal community composition showed that the fungal communities in the soil samples mainly belonged to Ascomycota and Basidiomycota, and Ascomycota was the dominant phylum. Alternaria was the dominant genus shared by all the six plants, but its abundance varies among different plants, with the highest abundance in Cynanchum sibiricum and the lowest in Euphorbia soongarica. There was a significant negative correlation between pH and fungal diversity, and a significant positive correlation between total phosphorus and fungal richness. The influence of pH, electrical conductivity and organic matter on dominant fungi was the most significant. [Conclusion] The rhizosphere soil fungal community composition and diversity of the six halophytes were significantly different in Ebinur Lake Wetland. The diversity and abundance of fungi in the rhizosphere soil of Suaeda glauca and Phragmites australis were higher than those of other plants, and Ascomycetes and Alternaria were the main soil fungal genera in Ebinur Lake Wetland. The research results could provide theoretical guidance for the ecological restoration of Ebi Lake wetland.