Dynamic succession of substrate-associated bacterial composition and function during Ganoderma lucidum growth

PeerJ

Qiang Li¹  Lijuan Yan²  Xiaoping Zhang³  Bo Zhang³  Jie Zou³  Weihong Peng⁴  Xiaolin Li⁴  Hao Tan⁴  Wei Tan⁴ 

[1] Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences,Chengdu, China;Chair for Aquatic Geomicrobiology, Institute of Biodiversity, Friedrich Schiller University Jena, Jena,Germany;Department of Microbiology, College of Resources, Sichuan Agricultural University, Chengdu, China;Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China;

关键词: Ganoderma lucidum;    Dynamic change;    NGS;    G. lucidum–bacteria-substrate;    Functional pathways;    Bacterial composition;   

DOI  :  10.7717/peerj.4975

来源: DOAJ

【 摘 要 】

Background Ganoderma lucidum, a valuable medicinal fungus, is widely distributed in China. It grows alongside with a complex microbial ecosystem in the substrate. As sequencing technology advances, it is possible to reveal the composition and functions of substrate-associated bacterial communities. Methods We analyzed the bacterial community dynamics in the substrate during the four typical growth stages of G. lucidum using next-generation sequencing. Results The physicochemical properties of the substrate (e.g. acidity, moisture, total nitrogen, total phosphorus and total potassium) changed between different growth stages. A total of 598,771 sequences from 12 samples were obtained and assigned to 22 bacterial phyla. Proteobacteria and Firmicutes were the dominant phyla. Bacterial community composition and diversity significantly differed between the elongation stage and the other three growth stages. LEfSe analysis revealed a large number of bacterial taxa (e.g. Bacteroidetes, Acidobacteria and Nitrospirae) with significantly higher abundance at the elongation stage. Functional pathway prediction uncovered significant abundance changes of a number of bacterial functional pathways between the elongation stage and other growth stages. At the elongation stage, the abundance of the environmental information processing pathway (mainly membrane transport) decreased, whereas that of the metabolism-related pathways increased. Discussion The changes in bacterial community composition, diversity and predicted functions were most likely related to the changes in the moisture and nutrient conditions in the substrate with the growth of G. lucidum, particularly at the elongation stage. Our findings shed light on the G. lucidum-bacteria-substrate relationships, which should facilitate the industrial cultivation of G. lucidum.

【 授权许可】

Unknown