Alcobiosis, an algal‑fungal association on the threshold of lichenisation

0576756 - BÚ 2024 RIV US eng J - Článek v odborném periodiku
Vondrák, Jan - Svoboda, Stanislav - Zíbarová, L. - Štenclová, Lenka - Mareš, Jan - Pouska, V. - Košnar, Jiří - Kubásek, J.
Alcobiosis, an algal‑fungal association on the threshold of lichenisation.
Scientific Reports. Roč. 13, Feb (2023), č. článku 2957. ISSN 2045-2322. E-ISSN 2045-2322
Grant CEP: GA TA ČR TH03030469
Institucionální podpora: RVO:67985939 ; RVO:60077344
Klíčová slova: carbon transfer * corticoid fungi * symbiosis
Obor OECD: Ecology
Impakt faktor: 4.6, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1038/s41598-023-29384-4

Alcobiosis, the symbiosis of algae and corticioid fungi, frequently occurs on bark and wood. Algae form a layer in or below fungal basidiomata reminiscent of the photobiont layer in lichens. Identities of algal and fungal partners were confirmed by DNA barcoding. Algal activity was examined using gas exchange and chlorophyll fluorescence techniques. Carbon transfer from algae to fungi was detected as C-13, assimilated by algae, transferred to the fungal polyol. Nine fungal partners scattered across Agaricomycetes are associated with three algae from Trebouxiophycae: Coccomyxa sp. with seven fungal species on damp wood, Desmococcus olivaceus and Tritostichococcus coniocybes, both with a single species on bark and rain-sheltered wood, respectively. The fungal partner does not cause any obvious harm to the algae. Algae enclosed in fungal tissue exhibited a substantial CO2 uptake, but carbon transfer to fungal tissues was only detected in the Lyomyces-Desmococcus alcobiosis where some algal cells are tightly enclosed by hyphae in goniocyst-like structures. Unlike lichen mycobionts, fungi in alcobioses are not nutritionally dependent on the algal partner as all of them can live without algae. We consider alcobioses to be symbioses in various stages of co-evolution, but still quite different from true lichens.
Trvalý link: https://hdl.handle.net/11104/0348723