Lichen and algae relationship help

Mutualisms between fungi and algae

lichen and algae relationship help

Discusses parasitic and mutualistic relationships of fungi. This fungus is a lichen, providing nutrients to the tree. The lichen gets sugars from. The nature of the symbiotic relationship in lichens Algae and Symbioses: Plants, Animals, Fungi, Viruses, Interactions Explored, Biopress, Bristol (), pp. Symbiosis in lichens is the mutually helpful symbiotic relationship of green algae and/or . Interaction. Help · About Wikipedia · Community portal · Recent changes · Contact page.

lichen and algae relationship help

The algal component of a lichen is known as phycobiont and the fungal component is called mycobiont. The fungus benefits from the symbiotic relation because algae or cyanobacteria produce food by photosynthesis, which is utilized by fungus. The algae or cyanobacteria benefit by being protected from the environment by the filaments of the fungus, which absorb moisture and nutrients from the environment, and usually provide an anchor to it.

lichen and algae relationship help

Such relation in which both the organisms are benefited from one another is called symbiosis. There about genera and 15, species of lichens.

Lichens : Symbiotic Relation Between Algae and Fungi

They are found worldwide. They usually grow on the barks of trees, dry logs of wood, bare rocks. They are xerophytes in nature and can withstand a long period of drought. On the basis of fungal components: The fungal partner belongs to Ascomycetes Basidiolichens: The fungal partner belongs to Basidiomycetes Deuterolichens: The fungal partner belongs to deuteromycetes On the basis of Thallus: In this case, the thallus form crust like structure.

It closely adheres to the substrate. They are found on bark or rock. Graphis, Lecanora, Haematomma In this case, thallus has leaf-like lobes.

lichen and algae relationship help

They are fixed from the substrate by hairy rhizoids like structure called rhizines. They are attached only at central points. Parmellia, Collema, Peltigera Their thalli are cylindrical ribbon-like and branched. It is attached only at the base by basal mucilagenous disc. They are commonly called as shrubby lichens.

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Two species of Lecanora have been used as food in the barren plains and mountains of Western Asia and Northern Africa. Certain classes of East Siberian inhabitants use lichens as vegetable diet.

  • Symbiosis in lichens
  • MUTUALISMS BETWEEN FUNGI AND ALGAE
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It is also used for the preparation of chocolates and pastries. It is a food for reindeer and cattle. Species of Cladonia, Citraria, Evernia, Parmelia are used as fodder. Usnic acid obtained from the Usnea and Cladonia species is used as an antibiotic against Gram-positive bacteria. Peltigera canina, the dog lichen is used as medicine for hydrophobia in ancient days.

Lobaria pulmonaria, lungwort are used for the diseases of lungs respiratory diseases and T. Parmelia is useful against epilepsy. The most commonly occurring genus of symbiotic cyanobacteria is Nostoc. Depending on context, the taxonomic name can be meant to refer to the entire lichen, or just the fungus that is part of the lichen.

The alga or cyanobacterim bears its own scientific name, which bears no relationship to either the name of the lichen or the fungus. The fungal partner may be an Ascomycete or Basidiomycete. Next to the Ascomycota, the largest number of lichenized fungi occur in the unassigned fungi imperfecti.

lichen and algae relationship help

Comparatively few Basidiomycetes are lichenized, but these include agaricssuch as species of Lichenomphaliaclavarioid fungisuch as species of Multiclavulaand corticioid fungisuch as species of Dictyonema. Other lichen fungi occur in only five orders in which all members are engaged in this habit Orders GraphidalesGyalectalesPeltigeralesPertusarialesand Teloschistales.

Lichens : Symbiotic Relation Between Algae and Fungi

Lichenized and nonlichenized fungi can even be found in the same genus or species. TrebouxiophyceaePhaeophyceaeChlorophyceae have been found to associate with the lichen-forming fungi.

One fungus, for example, can form lichens with a variety of different algae.

lichen and algae relationship help

The thalli produced by a given fungal symbiont with its differing partners will be similar, and the secondary metabolites identical, indicating that the fungus has the dominant role in determining the morphology of the lichen. Further, the same algal species can occur in association with different fungal partners.