Fungal associates of <Emphasis Type="Italic">Pyrola rotundifolia</Emphasis>, a mixotrophic Ericaceae,from two Estonian boreal forests |
| |
Authors: | Lucie Vincenot Leho Tedersoo Franck Richard Houria Horcine Urmas Kõljalg Marc-André Selosse |
| |
Institution: | (1) Centre d’Ecologie Fonctionnelle et Evolutive (CNRS, UMR 5175), Equipe Interactions Biotiques, 1919 Route de Mende, 34293 Montpellier Cedex 5, France;(2) Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai Str., 51005 Tartu, Estonia;(3) Natural History Museum of Tartu University, 46 Vanemuise Str., 51005 Tartu, Estonia |
| |
Abstract: | Pyrola rotundifolia (Ericaceae, Pyroleae tribe) is an understorey subshrub that was recently demonstrated to receive considerable amount of carbon
from its fungal mycorrhizal associates. So far, little is known of the identity of these fungi and the mycorrhizal anatomy
in the Pyroleae. Using 140 mycorrhizal root fragments collected from two Estonian boreal forests already studied in the context
of mixotrophic Ericaceae in sequence analysis of the ribosomal DNA internal transcribed spacer region, we recovered 71 sequences
that corresponded to 45 putative species in 19 fungal genera. The identified fungi were mainly ectomycorrhizal basidiomycetes,
including Tomentella, Cortinarius, Russula, Hebeloma, as well as some ectomycorrhizal and/or endophytic ascomycetes. The P. rotundifolia fungal communities of the two forests did not differ significantly in terms of species richness, diversity and nutritional
mode. The relatively high diversity retrieved suggests that P. rotundifolia does not have a strict preference for any fungal taxa. Anatomical analyses showed typical arbutoid mycorrhizae, with variable
mantle structures, uniseriate Hartig nets and intracellular hyphal coils in the large epidermal cells. Whenever compared,
fungal ultrastructure was congruent with the molecular identification. Similarly to other mixotrophic and autotrophic pyroloids
in the same forests, P. rotundifolia shares its mycorrhizal fungal associates with surrounding trees that are likely a carbon source for pyroloids. |
| |
Keywords: | Arbutoid mycorrhizae Ericaceae Ectomycorrhizal communities Endophytic fungi Mixotrophy Mycorrhizal anatomy |
本文献已被 PubMed SpringerLink 等数据库收录! |
|