Reports

Diffusible Factors Essential for Epidermal Cell Redifferentiaion in Catharanthus roseus

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Science  05 May 1989:
Vol. 244, Issue 4904, pp. 580-582
DOI: 10.1126/science.244.4904.580

Abstract

During postgenital tissue fusions, some plant epidermal cells redifferentiate into parenchyma, a different cell type. Diffusible factors cause this response in the fusing gynoecium of the Madagascar periwinkle (Catharanthus roseus). Surgical manipulations of the gynoecium showed that epidermal cells from normally nonfusing surfaces could trasmit and respond to the diffusible factors. Furthermore, the diffusible fators could be trapped in agar-impregnated barriers, as shown by the redifferentiation of carpel epidermal cells from nonfusing regions when the factor-loaded barriers were appressed to them.