Fungal heavy metal adaptation through single nucleotide polymorphisms and copy-number variation.

Abstract:

:Human-altered environments can shape the evolution of organisms. Fungi are no exception, although little is known about how they withstand anthropogenic pollution. Here, we document adaptation in the mycorrhizal fungus Suillus luteus driven by soil heavy metal contamination. Genome scans across individuals from recently polluted and nearby unpolluted soils in Belgium revealed low divergence across isolates and no evidence of population structure based on soil type. However, we detected single nucleotide polymorphism divergence and gene copy-number variation, with different genetic combinations potentially conferring the ability to persist in contaminated soils. Variants were shared across the population but found to be under selection in isolates exposed to pollution and located across the genome, including in genes involved in metal exclusion, storage, immobilization and reactive oxygen species detoxification. Together, our results point to S. luteus undergoing the initial steps of adaptive divergence and contribute to understanding the processes underlying local adaptation under strong environmental selection.

journal_name

Mol Ecol

journal_title

Molecular ecology

authors

Bazzicalupo AL,Ruytinx J,Ke YH,Coninx L,Colpaert JV,Nguyen NH,Vilgalys R,Branco S

doi

10.1111/mec.15618

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

4157-4169

issue

21

eissn

0962-1083

issn

1365-294X

journal_volume

29

pub_type

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