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Leaf Fungal Microbiome Is Modulated by Interspecific Hybridization Events Between Coffea Species.

Leandro Pio de Sousa1,2, Ludmila Dos Passos E Silva1, Matheus Pena Passos3

  • 1Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil.

Physiologia Plantarum
|July 8, 2026
PubMed
Summary

Interspecific hybridization in coffee plants (Coffea) alters leaf fungal communities, making hybrid microbiomes more like one parent. This reveals how host genetics impacts fungal community organization.

Keywords:
Coffeafungiinterspecific hybridsleafmicrobiome

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Area of Science:

  • Plant-microbe interactions
  • Microbiome research
  • Fungal ecology

Background:

  • Host phylogeny and domestication shape plant microbiomes.
  • Interspecific hybridization effects on microbial communities are understudied.

Purpose of the Study:

  • Investigate hybridization's impact on leaf fungal communities in five Coffea species and their hybrids.
  • Analyze composition, diversity, ecological organization, and co-occurrence patterns.

Main Methods:

  • Beta-diversity analysis to differentiate host genotypes.
  • Fungal genus assignment to guilds (pathogen-saprotrophs, yeasts).
  • Co-occurrence network analysis.

Main Results:

  • Fungal communities differed among Coffea genotypes.
  • Pathogen-saprotrophs dominated fungal communities.
  • Hybrids' fungal communities resembled C. arabica, showing asymmetric parental influence.
  • Coffea stenophylla had higher pigmented yeasts and saprotrophs.
  • Neutral associations were more common in hybrids.

Conclusions:

  • Host genetics and hybridization traits influence leaf-associated fungal community assembly.
  • Interspecific hybridization reorganizes fungal community ecological relations.
  • Dominant fungal taxa are conserved, but interactions shift with hybridization.