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.
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.