AI Article Synopsis
- Canonical sexual reproduction in basidiomycete fungi usually involves the fusion of two haploid individuals, resulting in a genetically diverse mycelial body, but some mushrooms, like Amanita phalloides, can reproduce without mating.
- Population genomics reveal that both homokaryotic (single nucleus) and heterokaryotic (multiple nuclei) mushrooms coexist in California, indicating that the nuclei of homokaryotic mushrooms can contribute to outcrossing.
- The study shows that death cap mushrooms have a unique mating type control and can reproduce both alone and with others, enabling their rapid spread in new environments over the past 17 to 30 years.
Article Abstract
Canonical sexual reproduction among basidiomycete fungi involves the fusion of two haploid individuals of different mating types, resulting in a heterokaryotic mycelial body made up of genetically different nuclei. Using population genomics data and experiments, we discover mushrooms of the invasive and deadly Amanita phalloides can also be homokaryotic; evidence of sexual reproduction by single, unmated individuals. In California, genotypes of homokaryotic mushrooms are also found in heterokaryotic mushrooms, implying nuclei of homokaryotic mycelia are also involved in outcrossing. We find death cap mating is controlled by a single mating type locus, but the development of homokaryotic mushrooms appears to bypass mating type gene control. Ultimately, sporulation is enabled by nuclei able to reproduce alone as well as with others, and nuclei competent for both unisexuality and bisexuality have persisted in invaded habitats for at least 17 but potentially as long as 30 years. The diverse reproductive strategies of invasive death caps are likely facilitating its rapid spread, suggesting a profound similarity between plant, animal and fungal invasions.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10598064 | PMC |
| http://dx.doi.org/10.1038/s41467-023-42317-z | DOI Listing |
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