AUTHOR=Liu Dong , He Xinhua , Chater Caspar C. C. , Perez-Moreno Jesús , Yu Fuqiang 

TITLE=Microbiome Community Structure and Functional Gene Partitioning in Different Micro-Niches Within a Sporocarp-Forming Fungus

JOURNAL=Frontiers in Microbiology

VOLUME=12

YEAR=2021

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2021.629352

DOI=10.3389/fmicb.2021.629352

ISSN=1664-302X

ABSTRACT=<p><italic>Thelephora ganbajun</italic> is a wild edible mushroom highly appreciated throughout China. The microbiomes of some fungal sporocarps have been studied, however, their potential functional roles currently remain uncharacterized. Here, functional gene microarrays (GeoChip 5.0) and amplicon sequencing were employed to define the taxonomic and functional attributes within three micro-niches of <italic>T. ganbajun</italic>. The diversity and composition of bacterial taxa and their functional genes differed significantly (<italic>p</italic> &lt; 0.01) among the compartments. Among 31,117 functional genes detected, some were exclusively recorded in one sporocarp compartment: 1,334 genes involved in carbon (<italic>mdh</italic>) and nitrogen fixation (<italic>nifH</italic>) in the context; 524 genes influencing carbon (<italic>apu</italic>) and sulfite reduction (<italic>dsrB</italic>, <italic>dsra</italic>) in the hymenophore; and 255 genes involved in sulfur oxidation (<italic>soxB</italic> and <italic>soxC</italic>) and polyphosphate degradation (<italic>ppx</italic>) in the pileipellis. These results shed light on a previously unknown microbiome and functional gene partitioning in sporome compartments of Basidiomycota. This also has great implications for their potential ecological and biogeochemical functions, demonstrating a higher genomic complexity than previously thought.</p>