Sentence Examples


  • Some plants root so freely that they need only pegging down; but in most cases the arrest of the returning sap to form a callus, and ultimately young roots, must be brought about artificially, either by twisting the branch, by splitting it, by girding FIG.
  • Aphidesand may be easily penetrated by certain Fungi such as Peziza, Nectria; and when thus attacked, the repeated conflicts between the cambium and callus, on the one hand, trying to heal over the wound, and the insect or Fungus, on the other, destroying the new tissues as they are formed, results in irregular growths; the still uninjured cambium area goes on thickening the branch, the dead parts, of course, remain unthickened, and the portion in which the Fungus is at work may for the time being grow more rapidly.
  • A canker is the result of repeated frustrated attempts on, the part of the callus to heal up a wound.
  • It is from the actively growing callus developed at the surface of the wounded tissues of cuttings, buddings, prunings, &c., that the healing and .renewal of tissues occur of which advantage is taken in the practice of what might well be termed plant surgery.
  • Wounds.The principal phenomena resulting from a simple wound, and the response of the irritated c~lls in healing by cork and in the formation of callus, have been indicated abeve.
 

How would you define callus? Add your definition here.

comments powered by Disqus