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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 #339001

Research Project: Epidemiology and Management of Pierce's Disease and Other Maladies of Grape

Location: Crop Diseases, Pests and Genetics Research

Title: Comparing root knot nematode (Meloidogyne spp.) effects on tomato (Solanum lycopersicum) and grapevine (Vitis spp.) metabolic profiles

Author
item Wallis, Christopher

Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/15/2017
Publication Date: 12/1/2017
Citation: Wallis, C.M. 2017. Comparing root knot nematode (Meloidogyne spp.) effects on tomato (Solanum lycopersicum) and grapevine (Vitis spp.) metabolic profiles. American Phytopathological Society Abstracts. 105:S1.119.

Interpretive Summary:

Technical Abstract: Root knot nematodes (Meloidogyne spp., RKN) can negatively impact both herbaceous annual and woody perennial hosts. RKN infestations also may increase plant host susceptibility to other stresses such as those imposed by water deficits or various diseases. However, little is known about direct or indirect effects of RKN feeding on plant physiology, and whether or not different plants types possess different resistance mechanisms. Therefore, this study assessed how metabolite profiles change in tomatoes (Solanum lycopersicum) or grapevines (Vitis spp.) infected with RKN over time. Preliminary results observed increased phenolic compounds in RKN infected tomatoes compared to controls, but no consistent changes in primary metabolites. Phenolic compounds also were increased in grapevines infected with RKN, although grapevines had many differences in phenolic profiles compared to tomatoes. Furthermore, grapevines infected with RKN had reduced fructose and glucose levels compared to controls. Taken together, these results demonstrated that RKN infections alter root physiology of both tomatoes and grapevines, with some distinct differences in host responses apparent. This study increases knowledge of how host plants respond to RKN infections, which could ultimately lead to ways to exploit induced host resistance responses to control nematodes.