These paired species take the form of lichens. The term symbiosis was first used in the 19th century to describe the lichen relationship, which was thought to be highly unusual. Since then ...

Lichen symbiosis includes at least one fungus and one alga, along with other fungi and bacteria in roles that are still being investigated by biologists. The continued health of lichens is vital ...

I. SYMBIOSIS IN PLANTS. (i) Lichens. IT is well known to botanists that the vegetative body (thallus) of lichen plants consists of two distinct organisms, a fungus and an alga (“gonidia”).

The Symbiosis station discusses parasitism and mutualism ... Another type of mutualistic fungus occurs in lichens. A lichen appears to be a single organism but is actually a composite: a fungus and a ...

Lichen symbiosis is particularly successful in habitats with frequent changes in water availability. In contrast, long periods of constant immersion in freshwater or seawater is tolerated only by a ...