AUTHOR=Yu Fei , Liang Jun-Feng , Song Jie , Wang Sheng-Kun , Lu Jun-Kun 

TITLE=Bacterial Community Selection of Russula griseocarnosa Mycosphere Soil

JOURNAL=Frontiers in Microbiology

VOLUME=11

YEAR=2020

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2020.00347

DOI=10.3389/fmicb.2020.00347

ISSN=1664-302X

ABSTRACT=<p><italic>Russula griseocarnosa</italic> is a wild, ectomycorrhizal, edible, and medicinal fungus with high economic value in southern China. <italic>R. griseocarnosa</italic> fruiting bodies cannot be artificially cultivated. To better understand the effects of abiotic and biotic factors on <italic>R. griseocarnosa</italic> growth, the physicochemical properties of <italic>R. griseocarnosa</italic> and its associated bacterial communities were investigated in two soil types (mycosphere and bulk soil) from Fujian, Guangdong, and Guangxi Provinces. The results revealed that the diversity, community structure, and functional characteristics of the dominant mycosphere bacteria in all geographical locations were similar. Soil pH and available nitrogen (AN) are the major factors influencing the mycosphere–soil bacterial communities’ structure. The diversity of soil bacteria is decreased in <italic>R. griseocarnosa</italic> mycosphere when compared with the bulk soil. <italic>Burkholderia-Paraburkholderia</italic>, <italic>Mycobacterium</italic>, <italic>Roseiarcus</italic>, <italic>Sorangium</italic>, <italic>Acidobacterium</italic>, and <italic>Singulisphaera</italic> may also be mycorrhiza helper bacteria (MHB) of <italic>R. griseocarnosa</italic>. The functional traits related to the two-component system, bacterial secretion system, tyrosine metabolism, biosynthesis of unsaturated fatty acids, and metabolism of cofactors and vitamins were more abundant in <italic>R. griseocarnosa</italic> mycosphere soil. The mycosphere soil bacteria of <italic>R. griseocarnosa</italic> play a key role in <italic>R. griseocarnosa</italic> growth. Application of management strategies, such as N fertilizer and microbial fertilizer containing MHB, may promote the conservation, propagation promotion, and sustainable utilization of <italic>R. griseocarnosa</italic>.</p>