Assessment of Compatibility among Armillaria cepistipes, A. sinapina, and North American Biological Species X and XI, Using Culture Morphology and Molecular Biology

Mycologia ◽  
1998 ◽  
Vol 90 (5) ◽  
pp. 798 ◽  
Author(s):  
Mark T. Banik ◽  
Harold H. Burdsall
Keyword(s):  
Molecular Biology ◽  
North American ◽  
Biological Species ◽  
Culture Morphology ◽  
Armillaria Cepistipes

Saccharomyces paradoxus and Saccharomyces cerevisiae are associated with exudates of North American oaks

1998 ◽  
Vol 44 (11) ◽  
pp. 1045-1050 ◽  
Author(s):  
Gennadi I Naumov ◽  
Elena S Naumova ◽  
Paul D Sniegowski
Keyword(s):  
Saccharomyces Cerevisiae ◽  
North American ◽  
Sensu Stricto ◽  
Biological Species ◽  
Saccharomyces Paradoxus ◽  
Saccharomyces Sensu Stricto ◽  
Ty Elements ◽  
Electrophoretic Karyotyping ◽  
Retrotransposable Element ◽  
First Time

Genetic hybridization and karyotypic analyses revealed the biological species Saccharomyces paradoxus and Saccharomyces cerevisiae in exudates from North American oaks for the first time. In addition, two strains collected from elm flux and from Drosophila by Phaff in 1961 and 1952 were reidentified as S. paradoxus. Each strain studied showed a unique profile of chromosomal hybridization with a probe for the retrotransposable element Ty1. The wild distribution of natural Saccharomyces sensu stricto yeasts is discussed.Key words: genetical taxonomy, Saccharomyces paradoxus, oak exudates, Ty elements, electrophoretic karyotyping.

scholarly journals Interfertility between Armillaria cepistipes and A. sinapina

2005 ◽  
Vol 77 (2) ◽  
pp. 67-74 ◽  
Author(s):  
J.A. Bérubé ◽  
M. Dessureault ◽  
S. Berthelay ◽  
J.-J. Guillaumin
Keyword(s):  
North America ◽  
Sympatric Species ◽  
Biological Species ◽  
Malt Extract ◽  
Low Level ◽  
Different Types ◽  
Genetic Barriers ◽  
Low Levels ◽  
Incubation Temperatures ◽  
Armillaria Cepistipes

European strains of Armillaria cepistipes were reported to be interfertile with strains from three American Armillaria species known as North American Biological Species (NABS) V (A sinapina), NABS X and NABS XI. Such interfertility between species raises some doubts about using different Latin binomials for species capable of mating. This interfertility was reinvestigated by mating 24 haploid isolates of European A cepistipes with 23 isolates of A sinapinafrom North America and Asia. Individual pairings were independently performed at least once at Universite Laval, Canada and at INRA Clermont-Ferrand, France. From the 420 interspecific pairings performed at Laval, two were positive and seven were ambiguous for a total of 2.1% of all the pairings. From the 506 pairings made at Clermont-Ferrand, 10 were positive and 24 were ambiguous for a total of 6.7%. The differences in the pairing results may be explained by incubation temperatures, and the different types and concentrations of malt extract used at each laboratory. The low levels of interfertility found between A. cepistipes and A. sinapina may result from the absence of genetic barriers that are usually present between sympatric species. This low level of interfertility reflects differences in morphology, distribution, and habitat for these two species of Armillaria and this supports the retention of different species denominations.

Infection of lodgepole pine and white spruce by Alberta isolates of Armillaria

1989 ◽  
Vol 19 (6) ◽  
pp. 685-689 ◽  
Author(s):  
Martin S. Mugala ◽  
Peter V. Blenis ◽  
Yasuyuki Hiratsuka ◽  
Kenneth I. Mallett
Keyword(s):  
North American ◽  
Root Rot ◽  
Lodgepole Pine ◽  
White Spruce ◽  
Biological Species ◽  
Containerized Seedlings ◽  
Pine Seedlings ◽  
Armillaria Root Rot

Two experiments were conducted to test the hypothesis that white spruce (Piceaglauca (Moench) Voss) is less liable than lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) to be attacked by Alberta isolates of Armillaria. In the first experiment, 27 two-year-old containerized pine and spruce were inoculated with each of 19 different isolates representing North American biological species (NABS) I and V, the Foothills variant of NABS I, and A. mellea s.str. In the second experiment, 10 containerized seedlings of both species were inoculated with eight different isolates of NABS I and transferred to 2-L pots 2 months later. Inoculum survived better in association with spruce seedlings than with pine. In both experiments, spruce seedlings were more frequently infected than pine seedlings, and more likely to die when infected, although this difference was significant only in the first experiment. Favoring or planting spruce on sites with Armillaria root rot, therefore, cannot be recommended in Alberta.

Abundance and distribution of rhizomorphs of Armillaria spp. in defoliated mixed oak stands in western Maryland

1990 ◽  
Vol 20 (6) ◽  
pp. 674-678 ◽  
Author(s):  
Mark J. Twery ◽  
Garland N. Mason ◽  
Philip M. Wargo ◽  
Kurt W. Gottschalk
Keyword(s):  
Gypsy Moth ◽  
North American ◽  
Biological Species ◽  
Oak Forests ◽  
Analysis Techniques ◽  
South Central ◽  
Dead Trees ◽  
Central Pennsylvania ◽  
Highly Correlated ◽  
Abundance And Distribution

The abundance and distribution of rhizomorphs of Armillaria spp. in the soil were quantified in undisturbed stands and in stands defoliated 1 and 5 years previously by insects. Although the species of Armillaria was not determined, similar mixed oak forests in south central Pennsylvania contain North American biological species VII (Armillariabulbosa Barla.). Several analysis techniques were tested for sensitivity to differences in distribution of rhizomorphs. Rhizomorph distribution within the 0.04-ha study plots was uniform in the undisturbed stands, but was significantly greater near dead trees in the defoliated stands. Total rhizomorph abundance was greater on plots defoliated 5 years before sampling than on more recently defoliated plots, and it was least on undefoliated plots. Rhizomorph density near dead trees was highly correlated with overall rhizomorph density. Greater rhizomorph abundance near recently dead trees or stumps may have important implications for management decisions in the presence of gypsy moth (Lymantriadispar L.) infestations.

Mating systems in the Xerulaceae: Xerula

1994 ◽  
Vol 72 (8) ◽  
pp. 1151-1163 ◽  
Author(s):  
Ronald H. Petersen ◽  
Andrew S. Methven
Keyword(s):  
Key Words ◽  
Mating Systems ◽  
Biological Species ◽  
Culture Morphology ◽  
Intersterility Groups

Mating systems in Xerula australis, Xerula furfuracea, Xerula incognita (sp.nov.), Xerula megalospora, Xerula rugosoceps, and the Xerula radicata complex are described, with notes on culture morphology and biogeographic distribution. All taxa tested were bifactorial (i.e., tetrapolar) and genetically isolated from one another. Multiple collections of X. furfuracea and X. megalospora were found to interbreed in vitro. Two collections of putative European X. radicata were found to be haploid, monokaryotic, nonmeiotic basidiomes genetically isolated from each other and from all other tested taxa, including X. radicata. Neohaploidization experiments with Xerula rufobrunnescens failed. A discussion comparing mating systems in Xerula to those in other genera of the Xerulaceae is included. Key words: mating systems, interbreeding, biological species, intersterility groups, biogeography, Xerula, basidiomycetes.

Setomelanomma holmii (Pleosporales, Phaeosphaeriaceae) on living spruce twigs in Europe and North America

2002 ◽  
Vol 80 (11) ◽  
pp. 1209-1215 ◽  
Author(s):  
Amy Y Rossman ◽  
David F Farr ◽  
Lisa A Castlebury ◽  
Robert Shoemaker ◽  
Alemu Mengistu
Keyword(s):  
Sequence Analysis ◽  
North America ◽  
North American ◽  
Picea Glauca ◽  
Type Specimen ◽  
Rdna Sequence ◽  
Its Rdna ◽  
Picea Pungens ◽  
Culture Morphology ◽  
Sequence Similarities

Setomelanomma holmii M. Morelet, previously known only from the type specimen in France, was discovered in the U.S.A. (Kansas and Wisconsin) and Canada (Ontario) on living twigs of spruce (Picea pungens and Picea glauca). This fungus was grown from ascospores and compared with the ex-holotype culture. Morphology and ITS rDNA sequence similarities indicate that S. holmii belongs in the Pleosporales, Phaeosphaeriaceae. Sequence analysis of the SSU nrDNA places S. holmii in a clade containing members of the Leptosphaeriaceae and Phaeosphaeriaceae. Setomelanomma holmii is redescribed and illustrated based on the holotype and North American specimens.Key words: Loculoascomycetes, Phaeosphaeriaceae, Picea, Pleosporales, needle chlorosis.

Relationships between European and North American biological species ofArmillaria mellea

1980 ◽  
Vol 4 (1) ◽  
pp. 78-86 ◽  
Author(s):  
James B. Anderson ◽  
Kari Korhonen ◽  
Robert C. Ullrich
Keyword(s):  
North American ◽  
Biological Species
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