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 5 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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Assembly and co-occurrence pattern of microbial communities in bulk and rhizosphere soils of Pinus elliottii plantations on sandy lands in China

Long,

Xiong,

et al. 2024

Plant Soil

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The adaptation of lichen symbiosis to desert saline‐alkali stress depends more on their symbiotic algae

Li,

Mamuti,

Xiao

et al. 2024

Physiologia Plantarum

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Soil salinization is a major environmental threat to the entire terrestrial ecosystem. Lichens arose from the symbiosis of fungi and algae or cyanobacteria. They have a high tolerance to various extreme environments, including adaptation to saline‐alkali habitats. Thus, lichens are pioneer species on saline‐alkali soil. However, the separate resilience of the two symbiotic partners under saline‐alkali conditions remains insufficiently understood. In this study, two representative symbiotic algae, Diplosphaera chodatii and Trebouxia jamesii, were studied for their physiological response to the saline‐alkali stress by adjusting different concentrations of NaHCO3, together with their respective symbiotic fungi Endocarpon pusillum (terricolous lichen) and Umbilicaria muhlenbergii (saxicolous lichen). The results indicate that cell growth rate and biomass in all four cultures decreased in alkali‐alkaline substrate, while cellular activities and ultrastructure were affected to a distinct extent. Compared with the symbiotic fungi, the algae were found to be more active in coordinating oxidative stress and lipid peroxidation damage under the saline‐alkali stress. The antioxidant system of the alga was especially shown as a key adaptive trait and it provides an important strategy for species survival and persistence in arid saline‐alkali desert. The specific survival ability of the lichen symbiosis relies on the stress resilience advantages of the symbiotic partners in combination. Our study provided new insights into understanding the adaptation of lichen symbiosis to desert saline‐alkali soil, and the potential of lichen symbiotic algae in the future desert ecological restoration.

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Host selection tendency of key microbiota in arid desert lichen crusts

Cited by 5 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

Assembly and co-occurrence pattern of microbial communities in bulk and rhizosphere soils of Pinus elliottii plantations on sandy lands in China

The adaptation of lichen symbiosis to desert saline‐alkali stress depends more on their symbiotic algae

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