Wound effects arrest wave phenomena in the secondary xylem of Rhamnus alaternus (Rhamnaceae)

Abstract

Wounding and partial girdling of stems of Rhamnus alaternus L. inhibited the formation of vessel wave patterns that are normally formed in the secondary xylem of this species. The patterns returned to normal in some of the trees in the first or in the second year after wounding. The possible hormonal regulatory mechanisms involved in the histological changes are discussed.