Induction of a tomato peroxidase gene in vascular tissue

Abstract
Expression of a tomato peroxidase gene that is constitutively expressed only in roots was induced in stems and leaves as a result of mechanical wounding. However, wound‐induction of TPX1 transcript accumulation in leaves was limited to the mid‐rib. No TPX1 transcript was detected in the lamina of the leaf after wounding. Peroxidase isozyme studies indicated the presence of a unique basic isoform in stems after wounding.