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Background <p>Yeasts are ubiquitous microorganisms thriving in diverse environments. They are prevalent members of the phyllosphere microbiome, but genomic studies of plant-associated yeasts remain limited.</p> Results <p>We established a taxonomically diverse yeast culture collection from flag leaves of field-grown wheat. This collection captured between 48-56% of the genus-level diversity detected by ITS amplicon sequencing conducted over two consecutive years, including the core members <i>Aureobasidium</i>, <i>Dioszegia</i>, <i>Filobasidium</i>, <i>Papiliotrema</i>, <i>Sporobolomyces</i>, and <i>Vishniacozyma</i>. De novo sequencing of 96 high-quality genomes from this collection, representing 14 yeast genera, and comparative genomics revealed specific signatures associated with life in the phyllosphere, the aboveground part of the plant. These adaptive traits encompass enriched carbohydrate metabolism, secondary metabolite biosynthetic pathways, and pectin degradation. The substantially smaller genomes of the phyllosphere yeast genera <i>Candida</i> and <i>Metschnikowia</i> suggest niche specialization via prioritizing metabolic pathways that are essential for survival in the nutrient-limited phyllosphere.</p> Conclusions <p>This study represents a significant advancement in our understanding of the diverse and largely unknown genomic traits of environmental yeasts and their adaptation to life in the phyllosphere environment. Our findings highlight their untapped functional potential for biotechnological applications in sustainable crop production.</p>

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Genomic insights into adaptative traits of phyllosphere yeasts

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月3日

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  • Linda Gouka,
  • Cristina Serra i Melendez,
  • Nelli Vardazaryan,
  • Knud Nor Nielsen,
  • Leise Riber,
  • Lars Hestbjerg Hansen,
  • Jos M. Raaijmakers,
  • Michael F. Seidl,
  • Chrats Melkonian,
  • Viviane Cordovez

摘要

Background

Yeasts are ubiquitous microorganisms thriving in diverse environments. They are prevalent members of the phyllosphere microbiome, but genomic studies of plant-associated yeasts remain limited.

Results

We established a taxonomically diverse yeast culture collection from flag leaves of field-grown wheat. This collection captured between 48-56% of the genus-level diversity detected by ITS amplicon sequencing conducted over two consecutive years, including the core members Aureobasidium, Dioszegia, Filobasidium, Papiliotrema, Sporobolomyces, and Vishniacozyma. De novo sequencing of 96 high-quality genomes from this collection, representing 14 yeast genera, and comparative genomics revealed specific signatures associated with life in the phyllosphere, the aboveground part of the plant. These adaptive traits encompass enriched carbohydrate metabolism, secondary metabolite biosynthetic pathways, and pectin degradation. The substantially smaller genomes of the phyllosphere yeast genera Candida and Metschnikowia suggest niche specialization via prioritizing metabolic pathways that are essential for survival in the nutrient-limited phyllosphere.

Conclusions

This study represents a significant advancement in our understanding of the diverse and largely unknown genomic traits of environmental yeasts and their adaptation to life in the phyllosphere environment. Our findings highlight their untapped functional potential for biotechnological applications in sustainable crop production.