Five years investigation of female and male genotypes in périgord black truffle (Tuber melanosporum Vittad.) revealed contrasted reproduction strategies

Autor: Igor Miquel, Herminia De la Varga, Flora Todesco, Torda Varga, Dominique Barry-Etienne, Melanie Lagoguet, François Le Tacon, Fabien Halkett, Claude Murat, Francis Martin, Christophe Robin
Přispěvatelé: Interactions Arbres-Microorganismes (IAM), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Sarl ALCINA, Laboratoire Agronomie et Environnement (LAE), ClimaTruf project, ANR-09-STRA-0010,SYSTRUF,Bases d'une gestion écologique durable, des écosystèmes truffiers (producteurs de Tuber melanosporum)(2009), ANR-11-LABX-0002,ARBRE,Recherches Avancées sur l'Arbre et les Ecosytèmes Forestiers(2011), Université de Lorraine (UL)-Institut National de la Recherche Agronomique (INRA)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Environmental Microbiology
Environmental Microbiology, Society for Applied Microbiology and Wiley-Blackwell, 2017, 19 (7), pp.2604-2615. ⟨10.1111/1462-2920.13735⟩
Environmental Microbiology, Wiley-Blackwell, 2017, 19 (7), pp.2604-2615. ⟨10.1111/1462-2920.13735⟩
ISSN: 1462-2912
1462-2920
DOI: 10.1111/1462-2920.13735⟩
Popis: Fungi display a rich variety of sexual reproduction systems and are therefore good models to investigate sex evolution. Moreover, understanding the investment in sexual reproduction of edible fungi is a critical challenge for improving their cultivation. The Perigord black truffle (Tuber melanosporum Vittad.) is a heterothallic ascomycete associated with trees through ectomycorrhizas and forming highly prized ascocarps. The aim of this study was to unravel the sexual reproduction strategy (hermaphroditic versus male/female specialization) of T. melanosporum in a truffle orchard by disentangling the contribution of female and male genotypes to the formation of ascocarps in a five-year investigation. Few genotypes were hermaphrodites, co-occurring with numerous genotypes behaving only as female or male, revealing trioecy. The genetic diversity of the male genotypes was higher than female diversity, suggesting for male elements a higher recruitment from ascospores. Most of the female and male genotypes were transitory (present only one year), whereas some genotypes persisted for several years: female-fertile genotypes as mycorrhizas, and male-fertile genotypes as soil free-living mycelium. Contrary to other ascomycetes, a high number of female-fertile only genotypes was found. We hypothesized that the mycorrhizal life style favours female-fertile strains and therefore that the life strategy influences fungal sexual strategy.
Databáze: OpenAIRE
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