Root-shoot interaction in the greening of wheat seedlings grown under red light

Academic Article


  • Wheat seedlings grown with roots exposed to constant red light (300-500 μmol m-2 s-1) did not accumulate chlorophyll in the leaves. In contrast, seedlings grown with their roots shielded from light accumulated chlorophylls. Chlorophyll biosynthesis could be induced in red-light-grown chlorophyll-deficient yellow plants by either reducing the red-light intensity at the root surface to 100 μmol m-2 s-1 or supplementing with 6% blue light. The inhibition of chlorophyll biosynthesis was due to impairment of the Mg-chelatase enzyme working at the origin of the Mg-tetrapyrrole pathway. The root-perceived photomorphogenic inhibition of shoot greening demonstrates root-shoot interaction in the greening process.
  • Published In

  • Plant Physiology  Journal
  • Digital Object Identifier (doi)

    Author List

  • Tripathy BC; Brown CS
  • Start Page

  • 407
  • End Page

  • 411
  • Volume

  • 107
  • Issue

  • 2