期刊
MOLECULAR ECOLOGY
卷 23, 期 13, 页码 3356-3370出版社
WILEY
DOI: 10.1111/mec.12821
关键词
454 pyrosequencing; bacterial communities; fungal communities; Glomeromycota; phylotyping; Pinus; Populus; Quercus; root endophytes
资金
- Genomic Science Program, U.S. Department of Energy, Office of Science - Biological and Environmental Research as part of the Plant Microbe Interfaces Scientific Focus Area
- National Science Foundation [EF-0832858, DEB-1011504, DEB-1145511]
- U.S. Department of Energy [DE-AC05-00OR22725]
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1300426] Funding Source: National Science Foundation
Microbial communities in plant roots provide critical links between above- and belowground processes in terrestrial ecosystems. Variation in root communities has been attributed to plant host effects and microbial host preferences, as well as to factors pertaining to soil conditions, microbial biogeography and the presence of viable microbial propagules. To address hypotheses regarding the influence of plant host and soil biogeography on root fungal and bacterial communities, we designed a trap-plant bioassay experiment. Replicate Populus, Quercus and Pinus plants were grown in three soils originating from alternate field sites. Fungal and bacterial community profiles in the root of each replicate were assessed through multiplex 454 amplicon sequencing of four loci (i.e., 16S, SSU, ITS, LSU rDNA). Soil origin had a larger effect on fungal community composition than did host species, but the opposite was true for bacterial communities. Populus hosted the highest diversity of rhizospheric fungi and bacteria. Root communities on Quercus and Pinus were more similar to each other than to Populus. Overall, fungal root symbionts appear to be more constrained by dispersal and biogeography than by host availability.
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