Universidad Complutense de Madrid
E-Prints Complutense

Algal-fungal mutualism: cell recognition and maintenance of the symbiotic status of lichens

Impacto

Descargas

Último año



Díaz, E. M. y Sánchez Elordi, Elena y Santiago, Rocío y Vicente Córdoba, Carlos y Legaz González, María Estrella (2016) Algal-fungal mutualism: cell recognition and maintenance of the symbiotic status of lichens. Journal of Veterinary Medicine and Research, 3 (3). ISSN 2378-931X

[img]
Vista previa
PDF
Creative Commons License
Esta obra está bajo una licencia de Creative Commons: Reconocimiento.

1MB

URL Oficial: http://www.jscimedcentral.com/VeterinaryMedicine/veterinarymedicine-3-1052.pdf



Resumen

Lichens are specific symbiotic associations between photosynthetic algae or cyanobacteria and heterotrophic fungi forming a double entity in which both components coexist. Specificity required for the lichen establishment can be defined in this context as the preferential, but not exclusive, association of a biont with another, since the algal factor susceptible to be recognized is an inducible protein. Recognition of compatible algal cells is performed by specific lectins produced and secreted by the potential mycobiont. Some lectins from phycolichens and cyanolichens are glycosylated arginases which bind to an algal cell wall receptor, identified as a a-1, 4-polygalactosylated urease. However, other ligands exist which bind other lectins specific for mannose or glucose. This implies that, after recognition of a potential, compatible partner, other fungal lectins could determine the final success of the association. Since the fungus can parasitize non - recognized partners during the development of the association, the success after the first contact needs of a set of algal cells, the number of which was sufficient to prevent that the death of a certain number of them makes fail the symbiosis. Fungal lectins act as chemo tactic factors in such a way that algae and cyanobacteria move towards the hyphae, to acquire that critical size of the colony, by means of successive contractions and relaxation of the actomyosin cytoskeleton in absence of any motile appendages.


Tipo de documento:Artículo
Palabras clave:Actin; Alga; Chemotactism;Cytoskeleton; Fungus; Lectin; Lichens; Recognition; Specificity
Materias:Ciencias Biomédicas > Biología > Botánica
Ciencias Biomédicas > Biología > Fisiología vegetal
Código ID:46901
Depositado:16 Mar 2018 09:49
Última Modificación:19 Mar 2018 09:00

Descargas en el último año

Sólo personal del repositorio: página de control del artículo