title: The process of wound repair in Udotea petiolata (Siphonales).
abstract: The process of wound repair is examined in the multiaxial thallus of Udotea petiolata. In response to cutting, the injured siphons form a plug, which quickly seals the wound surface. This plug is composed of a fibrillar substance, and of roundish bodies; the latter in unwounded siphons are present in the vacuole. A wound-wall is formed inside the plugs in every tested part of the thallus. Only the apical terminations of the fringe siphons are unable to form a complete wound repair. The composition and function of the two components are discussed.
mesh_terms: D008855:Microscopy, Electron, Scanning; D018521:Plant Physiological Phenomena; D010944:Plants / Q000648:ultrastructure; D014945:Wound Healing