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Structure and specialization of mycorrhizal networks in phylogenetically diverse tropical communities

2022; BioMed Central; Volume: 17; Issue: 1 Linguagem: Inglês

10.1186/s40793-022-00434-0

2524-6372

Benoît Perez‐Lamarque, Rémi Petrolli, Christine Strullu‐Derrien, Dominique Strasberg, Hélène Morlon, Marc‐André Selosse, Florent Martos,

Plant Pathogens and Fungal Diseases

The root mycobiome plays a fundamental role in plant nutrition and protection against biotic and abiotic stresses. In temperate forests or meadows dominated by angiosperms, the numerous fungi involved in root symbioses are often shared between neighboring plants, thus forming complex plant-fungus interaction networks of weak specialization. Whether this weak specialization also holds in rich tropical communities with more phylogenetically diverse sets of plant lineages remains unknown. We collected roots of 30 plant species in semi-natural tropical communities including angiosperms, ferns, and lycophytes, in three different habitat types on La Réunion island: a recent lava flow, a wet thicket, and an ericoid shrubland. We identified root-inhabiting fungi by sequencing both the 18S rRNA and the ITS2 variable regions. We assessed the diversity of mycorrhizal fungal taxa according to plant species and lineages, as well as the structure and specialization of the resulting plant-fungus networks.