Record ID No. |
2379 |
Author(s) |
Smith M E; Douhan G W; Fremier A K; Rizzo D M , 2009 |
Affiliation |
Farlow Herbarium and Department of Organismic and Evolutionary Biology, Harvard University, 22 Divinity Avenue, Cambridge, MA 02138, USA, email mesmith@oeb.harvard.edu |
Title |
Are true multihost fungi the exception or the rule? Dominant ectomycorrhizal fungi on Pinus sabiniana differ from those on co-occurring Quercus species |
Source. Vol.(no):Page |
New Phytologist 182(2): 295-299p. |
Categories |
Ectomycorrhiza |
Subjects |
Systematics |
Sub-subjects |
Morphological taxonomy |
Host |
Pinus sabiniana, Quercus |
Organism |
Ascomycota(Cenoccocum, Tuber, Peziza), Basidiomycota |
Country |
USA, N. America |
Abstracts |
This study was conducted to determine the dominant ectomycorrhizal fungi (EMF) on Pinus sabiniana roots and to compare them with the extensively documented EMF on the co-occurring Quercus species. It was also examined whether multihost EMF would be frequently shared among the three hosts, or whether pine-preferring EMF would be dominant on P. sabiniana. EM roots were sampled on 1 April 2005 from eight randomly selected P. sabiniana from previously sampled Quercus plots in Yuba County, California, USA. Eight P. sabiniana (717 EM roots and 752 clones; mean of 89.6 roots per tree) were sampled. A total of 33 EMF species, with two to nine species per lateral root (mean of 6.1 species) were detected. Basidiomycota were dominant on P. sabiniana, with 25 species accounting for 77.6% of the relative frequency. Eight Ascomycota were also recorded, but these only accounted for 22.4% of the relative frequency, and only two Ascomycota were detected on more than one Pinus. By contrast, 37-39% of the EMF species on Quercus were Ascomycota, and they accounted for 31-49% of the relative frequency. Furthermore, many dominant Quercus EMF were Ascomycota (e.g. Cenoccocum, Tuber, Peziza). To ensure that these host preferences were not strongly affected by the small P. sabiniana sample size, we performed 10 additional multiple-response permutation procedures tests with reduced Quercus datasets. For each MRPP test, we randomly selected data from 10 Q. wislizenii and 10 Q.douglasii cores, and analysed them with the entire P. sabiniana dataset. In each of the reduced datasets, MRPP confirmed the separation between the Quercus and Pinus ECM communities, but the effect size remained low. Although the majority of Pinus-associated EMF were only detected on Pinus, 14 EMF co-occurred on the roots of at least one Quercus species (c. 42% of taxa, 35% of relative frequency); all EMF species shared by both Pinus and Quercus were Basidiomycota. |