Fig. 11. Light micrograph of transverse section of two-year-old peach bark at 28 days postwounding stained with phosphine GN showing necrophylactic periderm (NP) formed internal to a ligno-suberized boundary (IT). Note necrotic tissue (NT), living tissue (LT), exophylactic periderm (EP), primary phloem fibers (F), and wound callus tissue (CL). Bar = 20 microns.