Uridine, a cell division factor in pea roots

Plant Mol Biol. 1995 Nov;29(4):869-73. doi: 10.1007/BF00041176.


Nodulation (root nodule formation) in legume roots is initiated by the induction of cell divisions and formation of root nodule primordia in the plant root cortex, usually in front of the protoxylem ridges of the central root cylinder. We isolated a factor from the central cylinder (stele) of pea roots which enhances hormone-induced cell proliferation in root cortex explants at positions similar to those of nodule primordia. The factor was identified as uridine. Uridine may act as a morphogen in plant roots at picomolar concentrations.

MeSH terms

  • Cell Division / drug effects
  • Dose-Response Relationship, Drug
  • Magnetic Resonance Spectroscopy
  • Peas / chemistry
  • Peas / cytology
  • Peas / drug effects
  • Peas / growth & development*
  • Plant Growth Regulators / isolation & purification
  • Plant Growth Regulators / pharmacology*
  • Plant Roots / chemistry
  • Plant Roots / cytology
  • Plant Roots / drug effects
  • Plant Roots / growth & development*
  • Uridine / isolation & purification
  • Uridine / pharmacology*


  • Plant Growth Regulators
  • Uridine