Tendrils induced by eavesdropping on airborne emissions of neighbors produced more leaves and inflorescences than unin- duced controls. Further, the VOCs can prime extrafloral nectar secretion, a taxonomically widespread anti-herbivore defense [15]. One potential approach to understanding volatile communica- tion involves using transgenic or mutant plants that are genetically modified in their potential to emit or receive VOC signals. In the current study, we used transgenic tobacco plants emitting (E)-b- ocimene [(3E)-3,7-dimethyl-l,3,6-octatriene] as emitters for plant- plant communication assays. The acyclic monoterpene hydrocar- bon b-ocimene was recently found to induce increased tissue levels of methyl jasmonate and transcript levels of defense/stress- inducible genes in Arabidopsis