Spider mite-induced expression of SAMT, GGPPS, and WIPI genes in JA-treated wild type and def-1. Intact infested wild-type (WT) and def-1 plants had been pretreated with 0.25 mm JA (+) or water (−). RT-PCR analysis is shown for SAMT, GGPPS, WIPI, and UBQ. The bar graphs represent quantification (means and ses of duplicated experiments) of the hybridizing bands that were normalized for ubiquitin.