FORT, Tania; PAUVERT, Charlie; ZANNE, Amy; OVASKAINEN, Otso; CAIGNARD, Thomas; BARRET, Matthieu; COMPANT, Stéphane; HAMPE, Arndt; DELZON, Sylvain; VACHER, Corinne

doi:10.1111/nph.17153

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FORT, Tania
Biodiversité, Gènes & Communautés [BioGeCo]

PAUVERT, Charlie
Biodiversité, Gènes & Communautés [BioGeCo]

ZANNE, Amy
The George Washington University [GW]

Langue

Article de revue

Ce document a été publié dans

New Phytologist. 2021p. 1-15

Wiley

Date de soutenance

2021

Résumé en anglais

The tree seed mycobiome has received little attention despite its potential role in forest regeneration and health. The aim of the present study was to analyze the processes shaping the composition of seed fungal communities in natural forests as seeds transition from the mother plant to the ground for establishment.We used metabarcoding approaches and confocal microscopy to analyze the fungal communities of seeds collected in the canopy and on the ground in four natural populations of sessile oak (Quercus petraea). Ecological processes shaping the seed mycobiome were inferred using joint species distribution models.Fungi were present in seed internal tissues, including the embryo. The seed mycobiome differed among oak populations and trees within the same population. Its composition was largely influenced by the mother, with weak significant environmental influences. The models also revealed several probable interactions among fungal pathogens and mycoparasites.Our results demonstrate that maternal effects, environmental filtering and biotic interactions all shape the seed mycobiome of sessile oak. They provide a starting point for future research aimed at understanding how maternal genes and environments interact to control the vertical transmission of fungal species that could then influence seed dispersal and germination, and seedling recruitment.< Réduire

Mots clés en anglais

endophyte

environmental filtering

joint species distribution models

maternal effect

microbial network

seed

Quercus petraea (sessile oak)

vertical transmission

DOI

http://dx.doi.org/10.1111/nph.17153

Project ANR

COntinental To coastal Ecosystems: evolution, adaptability and governance - ANR-10-LABX-0045
CEnter of the study of Biodiversity in Amazonia - ANR-10-LABX-0025

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202