This dataset consists of a data file with raw data from a bioassay that assessed the survival of root knot nematode (J2 life-stage) in the presence of different stilbenoid compounds, as well as another file showing summary descriptive statistics and a summary graph. The experiment consisted of counting the survival of J2 stage root knot nematodes in microplate wells with water amended with 0, 1.25, 2.5, 5, or 10 ppm of the stilbenoid monomer piceid, the stilbenoid dimer epsilon-viniferin, the stilbenoid trimer miyabenol C, or a mix of stilbenoid tetramers vitisin B and hopeaphenol. Counts were made at the beginning of the experiment and 1, 3, or 5 days later. The percent of surviving nematodes at day 5 was used to observe if the stilbenoid compounds would have effects on the root knot nematodes.

Data are from three experimental trials examining pre-existing water stress on Xylella fastidiosa infections and possible associated shifts in host chemistry, including free sugar, amino acid, and phenolic compound measurements. Trials A and B were utilized in the manuscript, whereas Trial C was data from an experiment whereby the water stress treatment was not significant enough to affect plant physiology or bacterial progression (but included for completeness). Predawn water potentials and photosynthesis were provided for trial B to show methodology worked (and for trial C to show the failure to reach water stress).

[NOTE - 5/31/2022: this dataset was updated to include two additional resources: Ring Nematode Phenolic Project Materials and Methods and Ring nematode phenolic induction and sensitivity data summaries. No other changes to the data were made.] This dataset includes data collected from two experiments, one in 2018 and one in 2019, that examined the potential induction of phenolic compounds in the roots of grapevines fed upon by ring nematodes, Mesocriconema xenoplax. Furthermore, a bioassay on 96-well plates was performed to examine the ability of a subclass of phenolics in grapevines (i.e. stilbenoids available as monomers, dimers, trimers, or tetramers) to affect ring nematode mortality. There appeared no significant effects of ring nematode feeding on phenolic levels, nor did these compounds affect survival in the in vitro tests.

This data is collected from two experiments, one in 2018 and one in 2019, that left untreated or inoculated grapevines with Diplodia seriata, Neofusicoccum parvum, Phaeomoniella chlamydospora, or mock-inoculated, and then two months later inoculated with one of the three pathogens. Grapevine stem phenolic levels were measured at the time of the second inoculation on a different branch, and comparisons were made between pathogen infected plants or those left non-inoculated. Lesion sizes of the second inoculations also were compared to examine the effects on the first inoculation on these. Lesion lengths were measured in mm, and all phenolic compound levels were measured in mg/g FW amounts.