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Keyword: Armillaria

Assessing potential Armillaria spp. distributions in western Oregon, western Washington, and Alaska

Publications Posted on: October 02, 2019
Armillaria species are key components of forest ecosystems throughout most regions of western North America. Their ecological roles range from beneficial saprobes to damaging root pathogens, and their impacts vary with environment and host.

Re-evaluation of Armillaria and Desarmillaria in South Korea based on ITS/tef1 sequences and morphological characteristics

Publications Posted on: August 21, 2018
Fungal species in the genera Armillaria and Desarmillaria (Physalacriaceae, Agaricales) are well known for their symbiotic relationships with Gastrodia elata and Polyporus umbellatus, important components of traditional medicine in Asia. In addition, some species in these genera cause Armillaria root disease, which has had a negative economic impact by damaging and destroying urban, horticultural and forest trees.

Insights into the phylogeny of Northern Hemisphere Armillaria: Neighbor-net and Bayesian analyses of translation elongation factor 1-α gene sequences

Publications Posted on: April 17, 2017
Armillaria possesses several intriguing characteristics that have inspired wide interest in understanding phylogenetic relationships within and among species of this genus. Nuclear ribosomal DNA sequence–based analyses of Armillaria provide only limited information for phylogenetic studies among widely divergent taxa.

Invasive Species Science Update (No. 7)

Publications Posted on: December 27, 2016
Invasive Species Science Updates are designed to keep managers and other users up-to-date with recently completed and ongoing research by RMRS scientists, as well as highlight breaking news related to invasive species issues.

Can metagenetic studies of soil microbial communities provide insights toward developing novel management approaches for Armillaria root disease?

Publications Posted on: June 23, 2016
Armillaria root diseases are among the most damaging and broadly distributed group of forest diseases in the world (Lockman et al. in press). Armillaria root disease is typically more severe in highly susceptible tree species and in trees that are maladapted due to rapidly changing climatic conditions (Ayres and Lombardero 2000, Kliejunas et al. 2009, Sturrock et al. 2011).

An integrated taxonomic approach to survey Armillaria in Iran

Publications Posted on: June 23, 2016
Iran's most valuable forests are located on the coast of the Caspian Sea and cover 1.85 million ha in the northern region of the Alborz mountain range, which is the highest mountain range in the Middle East. Dense forests cover two major provinces, Gilan and Mazandaran; however, less than 10% of Iran is forested. These forests comprise temperate, deciduous, broad-leaved tree species .

Forest root diseases across the United States

Publications Posted on: April 15, 2016
The increasing importance and impacts of root diseases on the forested ecosystems across the United States are documented in this report. Root diseases have long-term impacts on the ecosystems where they reside due to their persistence onsite. As a group of agents, they are a primary contributor to overall risk of growth loss and mortality of trees in the lower 48 States.

Survey for Armillaria by plant associations in northern Arizona

Publications Posted on: August 12, 2015
Fungi in the genus Armillaria are associated with an important disease of deciduous and coniferous trees and shrubs in western North America. This study examined the distribution of Armillaria by forest habitat types on the Kaibab National Forest and northern Coconino National Forest, Arizona. Over 400 trees were examined for Armillaria in 76 Interior West Forest Inventory and Analysis permanent plots representing 17 different habitat types.

Previously unknown, potentially invasive Armillaria root disease pathogen found in Mexico

Science Spotlights Posted on: December 03, 2014
Invasive root pathogens are a major threat to forest health worldwide, and the fungal pathogens that cause Armillaria root disease (Armillaria species) impact diverse tree species and are distributed globally. Studies to document the distribution of Armillaria species are essential for assessing potential invasive threats and potential impacts of climate change. Collaborative studies have begun to document the distribution of Armillaria pathogens in Mexico, and a previously unknown Armillaria species was found that represents an invasive threat to other areas.

Transcriptome of an Armillaria root disease pathogen reveals candidate genes involved in host substrate utilization at the host-pathogen interface

Publications Posted on: April 22, 2014
Armillaria species display diverse ecological roles ranging from beneficial saprobe to virulent pathogen. Armillaria solidipes (formerly A. ostoyae), a causal agent of Armillaria root disease, is a virulent primary pathogen with a broad host range of woody plants across the Northern Hemisphere. This white-rot pathogen grows between trees as rhizomorphs and attacks sapwood as mycelial fans under the bark.