Skip to main content
. 2013 Aug 21;110(37):14978–14983. doi: 10.1073/pnas.1300759110

Table 1.

Effects of experimental JA spray in this study, and natural defoliation in a previous study (17), on percent hydrolyzable tannin concentration in red oak foliage

Induction method Treatment Pretreatment concentration, % Posttreatment concentration, %
JA spray JA 19.7 ± 0.82 27.8 ± 0.82
Control 19.5 ± 0.74 15.9 ± 0.84
Natural defoliation Defoliated 23.30 ± 1.0 27.05 ± 1.4
Ref. 17 Control 23.36 ± 0.9 19.54 ± 0.9

Pretreatment concentrations were significantly different between studies (treatments, Inline graphic, Inline graphic, Inline graphic; controls, Inline graphic, Inline graphic, Inline graphic), as were posttreatment control concentrations (Inline graphic, Inline graphic, Inline graphic), reflecting natural background variability in hydrolyzable tannins. Posttreatment concentrations were nevertheless effectively identical in JA-sprayed and naturally defoliated branches (Inline graphic,Inline graphic, Inline graphic), and controls in the two studies declined by similar magnitudes.