Record ID No. |
2062 |
Author(s) |
Ligrone R , Carafa A., Lumini E., Bianciotto V., Bonfante P., Duckett J.G , 2007 |
Affiliation |
University of Naples 2, Dipartimento Sci Ambientali, Via A Vivaldi 43, I-81100 Caserta, ITALY |
Title |
Glomeromycotean associations in liverworts: A molecular cellular and taxonomic analysis |
Source. Vol.(no):Page |
American Journal of Botany.94(11):1756-1777p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
ITALY, Europe |
Abstracts |
Liverworts form endophytic associations with fungi that mirror mycorrhizal
associations in tracheophytes. Here we report a worldwide survey of liverwort associations with
glomeromycotean fungi (GAs), together with a comparative molecular and cellular analysis in
representative species. Liverwort GAs are circumscribed by a basal assemblage embracing the
Haplomitriopsida, the Marchantiopsida (except a few mostly derived clades), and part of the
Metzgeriidae. Fungal endophytes from Haplomitrium, Conocephalum, Fossombronia, and Pellia were
related to Glomus Group A, while the endophyte from Monoclea was related to Acaulospora. An
isolate of G. Mosseae colonized axenic thalli of Conocephalum, producing an association similar
to that in the wild. Fungal colonization in marchantialean liverworts suppressed cell wall
autofluorescence and elicited the deposition of a new wall layer that specifically bound the
monoclonal antibody CCRC-M1 against fucosylated side groups associated with xyloglucan and
rhamnogalacturonan I. The interfacial material covering the intracellular fungus contained the
same epitopes present in host cell walls. The taxonomic distribution and cytology of liverwort
GAs suggest an ancient origin and multiple more recent losses, but the occurence in widely
separated liverwort taxa of fungi related to glomeromycotean lineages that form arbuscular
mycorrhizas in tracheophytes, notably the Glomus Group A, is better explained by host shifting
from tracheophytes to liverworts. |