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ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Crop Diseases, Pests and Genetics Research » Research » Publications at this Location » Publication #393029
Research Project: Development of Applied Management Systems for Diseases of Perennial Crops with Emphasis on Vector-Borne Pathogens of Grapevine and Citrus

Location: Crop Diseases, Pests and Genetics Research

Title: Identification of novel Trichoderma strains that provide grapevine resistance to canker pathogens and Xylella fastidiosa

Author
item Gorman, Zachary
item Wallis, Christopher

Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 4/15/2022
Publication Date: 11/1/2022
Citation: Gorman, Z.J., Wallis, C.M. 2022. Identification of novel Trichoderma strains that provide grapevine resistance to canker pathogens and Xylella fastidiosa. American Phytopathological Society Abstracts.

Interpretive Summary:

Technical Abstract: Trunk and vascular pathogens of grapevine, including fungal canker pathogens and Xylella fastidiosa, represent major threats to the billion-dollar grapevine industry. These pathogens can infect perennial tissues of the plant and eventually cause plant death. Despite the significant economic losses caused by these diseases, there are few successful prophylactic strategies available to manage these pathogens. The use of biological controls to prevent plant disease is an under-utilized, but proven and cost-effective method of plant disease management. Trichoderma spp. are ubiquitous plant endophytes and are some of the best-known biological control agents. Trichoderma ssp. confer enhanced disease resistance to a wide spectrum of plant pathogens through several mechanisms, including direct competition for resources, production of anti-microbial metabolites and enzymes, and priming of plant defenses. Here, we report the isolation and identification of new Trichoderma strains from grapevines in the Central Valley of California that confer grapevine resistance to canker pathogens and X. fastidiosa. To gain a better understanding of the potential mechanisms behind this resistance, we profiled the secondary metabolites synthesized by these strains and assembled their genomes. The novel Trichoderma strains identified in this study represent important resources that can potentially be utilized to control diverse trunk and vascular diseases of grapevine.