CALLUS

Callus

Plant callus is a mass of unorganized parenchyma cells derived from plant tissue for use in biological research and biotechnology. In plant biology, callus cells are those cells that cover a plant wound. Callus formation is induced from plant tissues after surface sterilization and plating onto in vitro tissue culture medium. Plant growth regulators, such as auxins, cytokinins, and gibberellins, are supplemented into the medium to initiate callus formation or somatic embryogenesis. Callus initiation has been described for many plant taxonomic divisions: [[Image:Callus1.jpg|thumb|Callus Nicotiana tabacum]]

The above text is a snippet from Wikipedia: Callus (cell biology)
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callus

Noun

  1. A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.
  2. The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece.
  3. The new formation over the end of a cutting, before it puts out rootlets.

Verb

  1. To form such hardened tissue


The above text is a snippet from Wiktionary: callus
and as such is available under the Creative Commons Attribution/Share-Alike License.

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