Host selection tendency of key microbiota in arid desert lichen crusts

Zhang, Ting‐Ting; Grube, Martin; Wei, Xin‐Li

doi:10.1002/imt2.138

Cited by 2 publications

(1 citation statement)

References 62 publications

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“…This is likely because the types of secondary metabolites secreted by different species within the genus Parmelia do not vary significantly (this also applies to Peltigera ) [ 51 , 52 ]. Previous findings that reported no significant differences in bacterial community composition between two Endocarpon species support our results [ 53 ]. There was a high proportion of unclassified fungi within the lichen mycobiome [ 17 , 19 , 54 ].…”

Section: Discussionsupporting

confidence: 93%

Continental scale comparison of mycobiomes in Parmelia and Peltigera lichens from Turkey and South Korea

Yang,

Woo,

Sesal

et al. 2024

BMC Microbiol

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Background Lichens, traditionally considered as a simple partnership primarily between mycobiont and photobiont, are, in reality, complex holobionts comprised of a multitude of microorganisms. Lichen mycobiome represents fungal community residing within lichen thalli. While it is acknowledged that factors like the host lichen species and environmental conditions influence the structure of the lichen mycobiome, the existing research remains insufficient. To investigate which factor, host genus or location, has a greater impact on the lichen mycobiome, we conducted a comparative analysis of mycobiomes within Parmelia and Peltigera collected from both Turkey and South Korea, using high-throughput sequencing based on internal transcribed spacer region amplification. Results Overall, the lichen mycobiome was dominated by Capnodiales (Dothideomycetes), regardless of host or location. At the order level, the taxonomic composition was not significantly different according to lichen genus host or geographical distance. Hierarchical clustering of the top 100 abundant ASVs did not clearly indicate whether the lichen mycobiome was more influenced by host genus or location. Analyses of community similarity and partitioning variables revealed that the structure of the lichen mycobiome is more significantly influenced by location than by host genus. When analyzing the core mycobiome by host genus, the Peltigera mycobiome contained more ASV members than the Parmelia mycobiome. These two core mycobiomes also share common fungal strains, including basidiomycete yeast. Additionally, we used chi-squared tests to identify host genus-specialists and location-specialists. Conclusions By comparing lichen mycobiomes of the same genera across different countries, our study advances our comprehension of these microbial communities. Our study elucidates that, although host species play a contributory role, geographic distance exerts a more pronounced impact on the structure of lichen mycobiome. We have made foundational contributions to understanding the lichen mycobiome occupying ecologically crucial niches. We anticipate that broader global-scale investigations into the fungal community structures will provide more detailed insights into fungal residents within lichens.

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Section: Discussionsupporting

confidence: 93%

Continental scale comparison of mycobiomes in Parmelia and Peltigera lichens from Turkey and South Korea

Yang,

Woo,

Sesal

et al. 2024

BMC Microbiol

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Host specialization and spatial divergence of bacteria associated with Peltigera lichens promote landscape gamma diversity

Schwob,

Almendras,

Veas-Mattheos

et al. 2024

Environmental Microbiome

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Background Lichens are micro-ecosystems relying on diverse microorganisms for nutrient cycling, environmental adaptation, and structural support. We investigated the spatial-scale dependency of factors shaping the ecological processes that govern lichen-associated bacteria. We hypothesize that lichens function as island-like habitats hosting divergent microbiomes and promoting landscape gamma-diversity. Three microenvironments —thalli, substrates, and neighboring soils— were sampled from four geographically overlapping species of Peltigera cyanolichens, spanning three bioclimatic zones in the Chilean Patagonia, to determine how bacterial diversity, assembly processes, ecological drivers, interaction patterns, and niche breadth vary among Peltigera microenvironments on a broad geographical scale. Results The hosts’ phylogeny, especially that of the cyanobiont, alongside climate as a secondary factor, impose a strong ecological filtering of bacterial communities within Peltigera thalli. This results in deterministically assembled, low diverse, and phylogenetically convergent yet structurally divergent bacterial communities. Host evolutionary and geographic distances accentuate the divergence in bacterial community composition of Peltigera thalli. Compared to soil and substrate, Peltigera thalli harbor specialized and locally adapted bacterial taxa, conforming sparse and weak ecological networks. Conclusions The findings suggest that Petigera thalli create fragmented habitats that foster landscape bacterial gamma-diversity. This underscores the importance of preserving lichens for maintaining a potential reservoir of specialized bacteria. Supplementary Information The online version contains supplementary material available at 10.1186/s40793-024-00598-x.

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Host selection tendency of key microbiota in arid desert lichen crusts

Cited by 2 publications

References 62 publications

Continental scale comparison of mycobiomes in Parmelia and Peltigera lichens from Turkey and South Korea

Continental scale comparison of mycobiomes in Parmelia and Peltigera lichens from Turkey and South Korea

Host specialization and spatial divergence of bacteria associated with Peltigera lichens promote landscape gamma diversity

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