Production of β-glucosidases by European Armillaria species

2020 ◽  
pp. e12624
Author(s):  
H. Idder-Ighili ◽  
A. Agustian ◽  
M. A. Idder ◽  
J. J. Guillaumin ◽  
D. Wipf ◽  
...  
Keyword(s):  
Armillaria Species

Combined progress in symptoms caused by Hymenoscyphus fraxineus and Armillaria species, and corresponding mortality in young and old ash trees

2021 ◽  
Vol 491 ◽  
pp. 119177
Author(s):  
Corrie Lynne Madsen ◽  
Chatchai Kosawang ◽  
Iben Margrete Thomsen ◽  
Lars Nørgaard Hansen ◽  
Lene R. Nielsen ◽  
...  
Keyword(s):  
Hymenoscyphus Fraxineus ◽  
Ash Trees ◽  
Armillaria Species

scholarly journals Molecular characterisation of Armillaria species from Zimbabwe

2003 ◽  
Vol 107 (3) ◽  
pp. 291-296 ◽  
Author(s):  
Eddie Mwenje ◽  
Brenda D. Wingfield ◽  
Martin P.A. Coetzee ◽  
Michael J. Wingfield
Keyword(s):  
Molecular Characterisation ◽  
Armillaria Species

Host range and geographic distribution of Armillaria root rot pathogens in the Canadian prairie provinces

1990 ◽  
Vol 20 (12) ◽  
pp. 1859-1863 ◽  
Author(s):  
K. I. Mallett
Keyword(s):  
Host Range ◽  
Geographic Distribution ◽  
Host Species ◽  
Root Rot ◽  
Boreal Forests ◽  
Common Species ◽  
Canadian Prairie ◽  
Armillaria Root Rot ◽  
Armillaria Species ◽  
Prairie Provinces

A survey to identify Armillaria root rot pathogens, their host range, and geographic distribution was conducted in the Canadian prairie provinces. Collections of basidiocarps and isolates from the wood of gymptomatic or dead trees were made. Armillaria species were identified by interfertility testing and by the L-DOPA method. Three Armillaria species, A. ostoyae (Romagn.) Herink, A. sinapina Bérubé & Dessureault, and A. calvescens Bérubé & Dessureault, were identified. Armillariaostoyae was the most common species in both the subalpine and boreal forests and was found on a wide variety of coniferous and deciduous host species. Armillariasinapina was in both the boreal and subalpine forests but occurred primarily on deciduous host species. Armillariacalvescens was rare and was found only in the boreal forest on both coniferous and deciduous host species.

Espèces biologiques d'armillaire dans les érablières dépérissantes du sud-est du Québec

1990 ◽  
Vol 20 (1) ◽  
pp. 43-47 ◽  
Author(s):  
M. Sabourin ◽  
M. Dessureault ◽  
J. A. Bérubé
Keyword(s):  
Sugar Maple ◽  
Biological Species ◽  
Frequent Species ◽  
Almost All ◽  
Armillaria Species

Biological species of the Armillaria complex present in declining sugar maple stands in southeastern Quebec were identified by pairing monosporous isolates with known tester strains. Armillariaostoyae (I), A. gemina (II), A. calvescens (III), and A. sinapina (V) were collected. Armillariacalvescens was the most frequent species and was found in almost all the stands sampled. The presence of various Armillaria species was not correlated with either the severity of decline of the stands or the health of the hosts with which they were associated, suggesting that none of the species present in sugar maple stands is particularly responsible for their decline. However, the role of A. calvescens and the factors that favor its development warrant further investigations because this species appears to be found almost exclusively on maple trees.

scholarly journals Coarse-scale population structure of pathogenic Armillaria species in a mixed-conifer forest in the Blue Mountains of northeast Oregon

2003 ◽  
Vol 33 (4) ◽  
pp. 612-623 ◽  
Author(s):  
B A Ferguson ◽  
T A Dreisbach ◽  
C G Parks ◽  
G M Filip ◽  
C L Schmitt
Keyword(s):  
Population Structure ◽  
Biological Species ◽  
Conifer Forest ◽  
Mixed Conifer ◽  
Coarse Scale ◽  
Blue Mountains ◽  
Armillaria Ostoyae ◽  
Mixed Conifer Forest ◽  
Scale Population ◽  
Armillaria Species

The coarse-scale population structure of pathogenic Armillaria (Fr.) Staude species was determined on approximately 16 100 ha of relatively dry, mixed-conifer forest in the Blue Mountains of northeast Oregon. Sampling of recently dead or live, symptomatic conifers produced 112 isolates of Armillaria from six tree species. Armillaria species identifications done by using a polymerase chain reaction based diagnostic and diploid–diploid pairings produced identical results: 108 of the isolates were Armillaria ostoyae (Romagn.) Herink and four were North American Biological Species X (NABS X). Five genets of A. ostoyae and one of NABS X were identified through the use of somatic incompatibility pairings among the putatively diploid isolates. Armillaria ostoyae genet sizes were approximately 20, 95, 195, 260, and 965 ha; cumulative colonization of the study area was at least 9.5%. The maximum distance between isolates from the 965-ha A. ostoyae genet was approximately 3810 m, and use of three estimates of A. ostoyae spread rate in conifer forests resulted in age estimates for the genet ranging from 1900 to 8650 years. Results are discussed in relation to possible mechanisms that influenced the establishment, expansion, and expression of these genets; the genetic structure and stability of Armillaria; and the implications for disease management in this and similar forests.

Haploid monokaryotic basidiocarp tissues in species of Armillaria

1987 ◽  
Vol 65 (1) ◽  
pp. 69-71 ◽  
Author(s):  
Robert B. Peabody ◽  
Diane Cope Peabody
Keyword(s):  
United States ◽  
Somatic Cells ◽  
Genetic Material ◽  
Northeastern United States ◽  
Intersterility Groups ◽  
Armillaria Species

Viable spores and ethanol-fixed basidiocarps of Armillaria species were collected at eight geographic localities within the northeastern United States. Crosses among haploid hyphae grown from isolated single spores revealed that three to five intersterility groups were represented in this sample. By using spores to establish expected quantities of DNA within haploid cells, fluorescence microspectrophotometric measurements of stipe hyphae fell within the haploid range in all eight geographic isolates. Haploid monokaryotic basidiocarp tissues are unexpected in Basidiomycetes and may indicate the existence of a new pattern for the distribution of genetic material among somatic cells.

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