Journal
APPLIED SOIL ECOLOGY
Volume 132, Issue -, Pages 91-98Publisher
ELSEVIER
DOI: 10.1016/j.apsoil.2018.08.014
Keywords
Old Platycladus orientalis; Major microbial genera; 16S and ITS rRNA sequencing; Soil nutrients
Categories
Funding
- National Forestry Industry Research Special Funds for Public Welfare Projects [201404302]
- National Key Research and Development Program [2016YFC0501706, 2017YFC0504605]
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Soil microbial community composition and diversity were significantly affected by tree species, growth stage and soil nutrients in the forest ecosystem. We analyzed the bulk and rhizosphere soil microbial communities associated with young (20 year) and old (1000 year) trees of Platycladus orientalis using 16S and ITS rRNA high-throughput gene sequencing techniques. Platycladus orientalis growth altered the nutrient and microbial community compositions in the bulk and rhizosphere soils. In a typing analysis, the bacterial and fungal communities clustered into two and three groups, respectively, and only the fungal diversity exhibited significant differences between the bulk and rhizosphere soils. Soil microbial community compositions in bulk and rhizosphere soils were dominated by Acidobacteria, Proteobacteria, Actinobacteria and Ascomycota phyla, and their changes were driven by the Gemmatimonadetes, Nitrospirae, Planctomycetes, Zygomycota and Basidiomycota phyla. Compared with soils under young trees, 24.63% and 72.80% of the bacterial and fungal genera in bulk soil and 24.78% and 59.92% of the bacterial and fungal genera in rhizosphere soil shifted in the old trees samples. Soil microbial community compositions were sensitive to changes of soil nutrients, which explained 82.10% and 86.79% of the total variation in the major bacterial and fungal genera community compositions, respectively. Our results suggest that long-term growth of Platycladus orientalis trees significantly altered bulk and rhizosphere microbial community compositions, and its influence was greater on the fungal community than on the bacterial community.
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