First report of the Armillaria root disease pathogen, Armillaria sinapina, on subalpine fir (Abies lasiocarpa) and quaking aspen (Populus tremuloides) in Colorado

K. S. Burns; J. W. Hanna; Ned B. Klopfenstein; M.-S. Kim

doi:10.1094/PDIS-07-15-0837-PDN

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First report of the Armillaria root disease pathogen, Armillaria sinapina, on subalpine fir (Abies lasiocarpa) and quaking aspen (Populus tremuloides) in Colorado

Formally Refereed

Authors:

K. S. Burns, J. W. Hanna, Ned B. Klopfenstein, M.-S. Kim

Year:

2016

Type:

Scientific Journal

Station:

Rocky Mountain Research Station

DOI:

https://doi.org/10.1094/PDIS-07-15-0837-PDN

Source:

Plant Disease. 100(1): 217.

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Abstract

In July 2014, mycelial fans (isolates CO104F, CO106F, and CO108F) of Armillaria sp. were collected from forest trees in Colorado. These isolates were all identified as A. sinapina based on a somatic pairing test against 18 tester isolates representing six North American Armillaria spp. and nucleotide sequences of the translation elongation factor 1alpha (tef-1alpha; GenBank Accession Nos. KT327065, KT327066, and KT327067). Based on nine replications of somatic incompatibility tests, all isolates showed high intraspecific compatibility (colorless antagonism) with three A. sinapina tester isolates (average 77%), but low compatibility with closely related Armillaria spp. (average 0 to 26%).

Keywords

Armillaria root disease, Armillaria sinapina

Citation

Burns, K. S.; Hanna, J. W.; Klopfenstein, N. B.; Kim, M.-S. 2016. First report of the Armillaria root disease pathogen, Armillaria sinapina, on subalpine fir (Abies lasiocarpa) and quaking aspen (Populus tremuloides) in Colorado. Plant Disease. 100(1): 217.