Increased potato tuber size resulting from apoplastic expression of a yeast invertase

Nat Biotechnol. 1997 Aug;15(8):794-7. doi: 10.1038/nbt0897-794.


The role of sucrose cleavage in determining sink strength in potato was investigated by generating transgenic potato plants that expressed a yeast invertase in either the cytosol or apoplast of tubers. Cytosolic localization gave rise to a reduction in tuber size and an increase in tuber number per plant whereas apoplastic targeting led to an increase in tuber size and a decrease in tuber number per plant. Sink organ size can be manipulated through modification of sucrose metabolism.

MeSH terms

  • Chimera / genetics
  • Cytosol / enzymology
  • Glycoside Hydrolases / genetics
  • Glycoside Hydrolases / metabolism*
  • Plants, Genetically Modified / cytology
  • Plants, Genetically Modified / genetics
  • Plants, Genetically Modified / growth & development
  • Saccharomyces cerevisiae / enzymology*
  • Solanum tuberosum / cytology
  • Solanum tuberosum / genetics
  • Solanum tuberosum / growth & development*
  • Sucrose / metabolism
  • beta-Fructofuranosidase


  • Sucrose
  • Glycoside Hydrolases
  • beta-Fructofuranosidase