Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/127209
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Cretaceous mycelia preserving fungal polysaccharides: taphonomic and paleoecological potential of microorganisms preserved in fossil resins |
Autor: | Speranza, Mariela CSIC; Ascaso, Carmen CSIC ORCID ; Delclòs, Xavier; Peñalver Mollá, Enrique | Palabras clave: | Amber Taphonomy Paleoecology Biomarkers Fungi |
Fecha de publicación: | dic-2015 | Editor: | Universidad de Barcelona | Citación: | Geologica Acta 13(4): 363-385 (2015) | Resumen: | The cortices of pieces of Cretaceous amber around the world commonly are constituted by networks of filamentous structures. Based on their morphological characteristics, such structures have previously been classified in different microorganismal groups. Their correct interpretation, however, is of great importance to establish the conditions of the resin’s burial in the forest litter, and can provide important clues regarding the ecology and environmental conditions of Cretaceous resinous forests. Because these networks of filamentous structures present typical fungal morphological features we conducted a study in order to resolve their origin. The cortices of several pieces of Cretaceous amber from Spain were examined using light and scanning electron microscopy, energy dispersive X-ray spectroscopy, and confocal laser scanning microscopy. This is the first time that Calcofluor white and Wheat germ agglutinin conjugated with fluorescein isothiocyanate have been employed as fungal markers in amber, and their use enabled us to detect preserved polysaccharides in the filamentous structures using confocal laser scanning microscopy. These results provide the first and oldest record of ß-1,3 and ß-1,4-linked polysaccharides, and specifically N-acetylglucosamine residues from chitin in a fossil fungus preserved in amber, and to demonstrate that the networks of filamentous structures are mycelia composed of profuse hyphae of a resinicolous fungus. This type of mycelium constitutes one of the largest fungal fossil records known. Using taphonomic data, it is demonstrated that the cortices originated during the Cretaceous due to fungal growth within non-solidified resin. The fossil diagenetic degradation sequence of the fungal hyphae and the surrounding amber is described. This degradation changed the microscopic appearance of the hyphae; thus, some of the previously indicated taxonomic features of this microorganism may actually be fossil diagenetic artifacts. The paleoecological implications with regard to fungal trophic requirements and forest environmental conditions are discussed. | Versión del editor: | http://dx.doi.org/10.1344/GeologicaActa2015.13.4.8 | URI: | http://hdl.handle.net/10261/127209 | DOI: | 10.1344/GeologicaActa2015.13.4.8 | ISSN: | 1695-6133 |
Aparece en las colecciones: | (MNCN) Artículos (IGME) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Geologica Acta 13(4) 363-385 (2015).pdf | 13,34 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
18
checked on 22-abr-2024
WEB OF SCIENCETM
Citations
18
checked on 24-feb-2024
Page view(s)
179
checked on 23-abr-2024
Download(s)
211
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons