Potato Research

, Volume 33, Issue 1, pp 97–108 | Cite as

Potato cuttings as models to study maturation and senescence

  • John J. McGrady
  • Elmer E. Ewing


Single leaf cuttings with their subtended axillary buds proved to be useful models to study maturation and senescence in potato (Solanum tuberosum L.). Senescence was more rapid if the cultivar was early maturing or if plants were exposed to short days before cuttings were taken. Rooting was decreased by short days before cutting; excision of the buried bud only partially overcame the effects on senescence and rooting. High rates of N to mother plants in the field delayed senescence of cuttings in a way analogous to the delayed senescence of field plants. The tuberization of cuttings from late maturing cultivars was decreased by high rates of N. The color of crisps made from bud tubers was positively correlated with the color of crisps made from ordinary tubers of the same cultivars. Sugar concentrations in bud tubers decreased as cuttings became more senescent and increased after cold storage. Bud tubers harvested while ‘immature’ had greater concentrations of reducing sugars after 90 d at 10°C than did ‘mature’ bud tubers.

Additional key words

Solanum tuberosum L. photoperiod sucrose glucose fructose reducing sugars periderm crisp color chip color 


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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • John J. McGrady
    • 1
  • Elmer E. Ewing
    • 1
  1. 1.Department of Vegetable CropsCornell UniversityIthacaUSA

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