The Microbiome Structure of the Symbiosis between the Desert Truffle Terfezia boudieri and Its Host Plant Helianthemum sessiliflorum

The desert truffle Terfezia boudieri is an ascomycete fungus that forms ect-endomycorrhiza in the roots of plants belonging to Cistaceae. The fungus forms hypogeous edible fruit bodies, appreciated as gourmet food. Truffles and host plants are colonized by various microbes, which may contribute to t...

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Published in:Journal of fungi (Basel) 2022-10, Vol.8 (10), p.1062
Main Authors: Satish, Lakkakula, Barak, Hana, Keren, Guy, Yehezkel, Galit, Kushmaro, Ariel, Ben-Dov, Eitan, Kagan-Zur, Varda, Barak, Ze’ev, Sitrit, Yaron
Format: Article
Language:English
Subjects:
Bacteria
bacterial diversity
Comparative analysis
desert truffles
Deserts
Dietary minerals
Discriminant analysis
Food plants
Fruit bodies
Fruits
Fungi
Generalized linear models
Helianthemum
Helianthemum sessiliflorum
Host plants
Microbiomes
mycorrhiza helper bacteria
Next-generation sequencing
Physiology
Plant growth
Rhizosphere
Roots
rRNA 16S
Symbiosis
Terfezia boudieri
Veganism
VOCs
Volatile organic compounds
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Summary:The desert truffle Terfezia boudieri is an ascomycete fungus that forms ect-endomycorrhiza in the roots of plants belonging to Cistaceae. The fungus forms hypogeous edible fruit bodies, appreciated as gourmet food. Truffles and host plants are colonized by various microbes, which may contribute to their development. However, the diversity and composition of the bacterial community under field conditions in the Negev desert are still unknown. The overall goal of this research was to identify the rhizosphere microbial community supporting the establishment of a symbiotic association between T. boudieri and Helianthemum sessiliflorum. The bacterial community was characterized by fruiting bodies, mycorrhized roots, and rhizosphere soil. Based on next-generation sequencing meta-analyses of the 16S rRNA gene, we discovered diverse bacterial communities of fruit bodies that differed from those found in the roots and rhizosphere. Families of Proteobacteria, Planctomycetes, and Actinobacteria were present in all four samples. Alpha diversity analysis revealed that the rhizosphere and roots contain significantly higher bacterial species numbers compared to the fruit. Additionally, ANOSIM and PCoA provided a comparative analysis of the bacterial taxa associated with fruiting bodies, roots, and rhizosphere. The core microbiome described consists of groups whose biological role triggers important traits supporting plant growth and fruit body development.
ISSN:2309-608X
2309-608X
DOI:10.3390/jof8101062