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Fungus - Lichens, Symbiosis, Photosynthesis: A lichen is an association between one or two fungus species and an alga or cyanobacterium (blue-green alga) that results in a form distinct from the symbionts. Although lichens appear to be single plantlike organisms, under a microscope the associations are seen to consist of millions of cells of algae (called the phycobiont) woven into a matrix ...
This lichen is a dark, steely blue color when wet. This lichen is called the dog tooth lichen because the orange-brown apothecia are produced in rolls on the margins, looking like horns or teeth. Photo by Maria Morrow, CC-BY. Figure \(\PageIndex{7}\): A dark brown, foliose lichen is growing intermixed with other lichens and moss.
Cyanobacteria will give the lichen a dark green, brown, or black color. In some lichens, however, there are no layers of fungus and alga. The individual components are mixed together in one big uniform layer and the resulting growth form is gelatinous. These types of lichens are called jelly lichens.
Lichen Basics. Lichens are amazing organisms. They are all around us and we hardly notice them. Found on soil, tree bark, rocks and even some under water, they are actually two organisms living together (symbiosis). The major component is a fungus (mycobiont), hence they are classified as fungi — the vast majority being ascomycetes.
Jun 8, 2016 · A lichen, or lichenized fungus, is actually two organisms functioning as a single, stable unit. Lichens comprise a fungus living in a symbiotic relationship with an alga or cyanobacterium (or both ...
An Introduction to Lichens. Herbarium Intern. 1999. A lichen looks like a single organism, but it is actually a symbiotic relationship between different organisms. It is composed of a fungal partner (mycobiont) and one or more photosynthetic partners (photobiont). The photosynthetic partner is generally green algae or cyanobacteria.
Apr 21, 2024 · A lichen is a combination of two organisms, a green alga or cyanobacterium and an ascomycete fungus, living in a symbiotic relationship. Whereas algae normally grow only in aquatic or extremely moist environments, lichens can potentially be found on almost any surface (especially rocks) or as epiphytes (meaning that they grow on other plants).
