Developmental stages and fine structure of surface callus formed after debarking of living lime trees (Tilia sp.).

ABSTRACT: Wounding of trees by debarking during the vegetative period sometimes results in the formation of callus tissue which develops over the entire wound surface or on parts of it. This light and transmission electron microscopy study of living lime trees found that the formation of such a surface callus is subdivided into three stages. During the first stage, numerous cell divisions take place in regions where differentiating xylem remains at the wound surface after debarking. This young callus tissue consists of isodiametric parenchymatous cells. Cambium cells, sometimes also remaining at the wound surface, collapse and do not contribute to callus formation. During the second stage, cells in the callus undergo differentiation by forming a wound periderm with phellem, phellogen and phelloderm.

SUBMITTER: Stobbe H 

PROVIDER: S-EPMC4233843 | biostudies-literature | 2002 Jun

REPOSITORIES: biostudies-literature