mycobiont

Overall, about 98% of lichens have an ascomycetous mycobiont .

It is possible that the photobiont triggers otherwise latent genes in the mycobiont.

In order to establish the lichen, the soredia propagules must contain both the photobiont and the mycobiont.

The alteration of the balance between the photobiont and mycobiont can lead to the breakdown of the symbiotic association.

These structures contain both the hyphae of the mycobiont and the algae(phycobiont) (see soredia and isidia.

Like all lichens, C. rubrocincta is an association of a fungus (the mycobiont) with a photosynthetic organism (the photobiont), in this case, an algae.

Xanthones and depsidones of the lichen Lecanora dispersa in nature and of its mycobiont in culture.

The mycobiont tends to be predominantly from the phyla Basidiomycota and Ascomycota, although a few are represented in the phylum Zygomycota.

The thallus is the vegetative body of a lichen that contains the lichen mycobiont (fungus) and the photobiont (algae and/or cyanobacteria).

In another publication later that year, he specified the mycobiont to be a hymenomycete, and described the monotypic genus Herpothallion to supersede the old name Chiodecton sanguineum.

(Eichorn, Evert, and Raven, 2005) While the reproductive structures are all composed of the same components (Mycobiont and Photobiont) they are each unique in other ways.

This is especially true of trees that have a high degree of specificity for their mycobiont, or trees that are being planted far from their native habitat among novel fungal species.

The lichen is heteromerous, meaning that the mycobiont and photobiont components are in well-defined layers, with the photobiont in a more or less distinct zone between the upper cortex and the medulla.

The algal layer is not continuous-contrasting with lichen species that have thalli that stratify into discrete tissue types, including a photobiont layer-and occurs with the mycobiont in the form of granules.

Upon exposure to air pollution, the photobiont may use metabolic energy for repair of cellular structures that would otherwise be used for maintenance of photosynthetic activity, therefore leaving less metabolic energy available for the mycobiont.

Further doubt was cast on the possibility of a basidiomycete mycobiont with the discovery of the depside confluentic acid in 1966, concentric bodies in 1975, and woronin bodies in 1983, as all of these characteristics are restricted to Ascomycetes.

One mycobiont associates with the same phycobiont species, rarely two, from the green algae, except that alternatively the mycobiont may associate with the same species of cyanobacteria (hence "photobiont" is the more accurate term).

Although the vast majority of lichen mycobionts are from the Ascomycota, in 1937 German lichenogist Friedrich Tobler believed the mycobiont to be a basidiomycete, because he interpreted some unusual microscopic structures to be clamp connections, structures associated only with the basidiomycete fungi.

The sensitivity of a lichen to air pollution is directly related to the energy needs of the mycobiont, so that the stronger the dependency of the mycobiont on the photobiont, the more sensitive the lichen is to air pollution.