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Multi-omic analyses of exogenous nutrient bag decomposition by the black morel Morchella importuna reveal sustained carbon acquisition and transferring

文献类型： 外文期刊

作者： Tan, Hao 1 ; Kohler, Annegret 3 ; Miao, Renyun 1 ; Liu, Tianhai 1 ; Zhang, Qiang 1 ; Zhang, Bo 1 ; Jiang, Lin 1 ; Wang, Y 1 ;

作者机构： 1.Sichuan Acad Agr Sci, Soil & Fertilizer Inst, Mushroom Res Ctr, Natl Local Joint Engn Lab Breeding & Cultivat Edi, Chengdu, Sichuan, Peoples R China

2.Minist Agr, Sci Observing & Expt Stn Agromicrobial Resource &, Chengdu, Sichuan, Peoples R China

3.Univ Lorraine, INRA, UMR Interact Arbres Microorganismes, Ctr INRA GrandEst, F-54280 Champenoux, France

4.US DOE, Joint Genome Inst, Walnut Creek, CA USA

5.Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA

6.Aix Marseille Univ, CNRS, Architecture & Fonct Macromol Biol, F-13288 Marseille, France

7.INRA, Architecture & Fonct Macromol Biol USC1408, F-13288 Marseille, France

8.King Abdulaziz Univ, Dept Biol Sci, Jeddah 21589, Saudi Arabia

期刊名称：ENVIRONMENTAL MICROBIOLOGY （ 影响因子：5.491； 五年影响因子：6.438 ）

ISSN： 1462-2912

年卷期： 2019 年 21 卷 10 期

页码：

收录情况： SCI

摘要： The black morel (Morchella importuna Kuo, O'Donnell and Volk) was once an uncultivable wild mushroom, until the development of exogenous nutrient bag (ENB), making its agricultural production quite feasible and stable. To date, how the nutritional acquisition of the morel mycelium is fulfilled to trigger its fruiting remains unknown. To investigate the mechanisms involved in ENB decomposition, the genome of a cultivable morel strain (M. importuna SCYDJ1-A1) was sequenced and the genes coding for the decay apparatus were identified. Expression of the encoded carbohydrate-active enzymes (CAZymes) was then analyzed by metatranscriptomics and metaproteomics in combination with biochemical assays. The results show that a diverse set of hydrolytic and redox CAZymes secreted by the morel mycelium is the main force driving the substrate decomposition. Plant polysaccharides such as starch and cellulose present in ENB substrate (wheat grains plus rice husks) were rapidly degraded, whereas triglycerides were accumulated initially and consumed later. ENB decomposition led to a rapid increase in the organic carbon content in the surface soil of the mushroom bed, which was thereafter consumed during morel fruiting. In contrast to the high carbon consumption, no significant acquisition of nitrogen was observed. Our findings contribute to an increasingly detailed portrait of molecular features triggering morel fruiting.

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