Deciphering the archaeal communities in tree rhizosphere of the Qinghai-Tibetan plateau

BMC Microbiology

article

Zhang, Mengjun¹  Chai, Liwei¹  Huang, Muke¹  Jia, Weiqian¹  Guo, Jiabao¹  Huang, Yi¹ 

[1]State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Science and Engineering, Peking University

关键词: Rhizosphere;    Archaeal community;    Assembly process;    Co-occurrence;    Qinghai-Tibetan plateau;   

DOI  :  10.1186/s12866-020-01913-5

学科分类：放射科、核医学、医学影像

来源: BioMed Central

【 摘 要 】

The Qinghai-Tibetan Plateau represents one of the most important component of the terrestrial ecosystem and a particularly vulnerable region, which harbouring complex and diverse microbiota. The knowledge about their underground microorganisms have largely been studied, but the characteristics of rhizosphere microbiota, particularly archaeal communities remains unclear. High-throughput Illumina sequencing was used to investigate the rhizosphere archaeal communities of two native alpine trees (Picea crassifolia and Populus szechuanica) living on the Qinghai-Tibetan Plateau. The archaeal community structure in rhizospheres significantly differed from that in bulk soil. Thaumarchaeota was the dominant archaeal phylum in all soils tested (92.46–98.01%), while its relative abundance in rhizospheres were significantly higher than that in bulk soil. Ammonium nitrogen, soil organic matter, available phosphorus and pH were significantly correlated with the archaeal community structure, and the deterministic processes dominated the assembly of archaeal communities across all soils. In addition, the network structures of the archaeal community in the rhizosphere were less complex than they were in the bulk soil, and an unclassified archaeal group (Unclassified_k_norank) was identified as the keystone species in all archaeal networks. Overall, the structure, assembly and co-occurrence patterns of archaeal communities are significantly affected by the presence of roots of alpine trees living on the Qinghai-Tibetan Plateau. This study provides new insights into our understanding of archaeal communities in vulnerable ecosystems.

【 授权许可】

CC BY|CC0