Potato cuttings as models to study maturation and senescence |
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Authors: | John J McGrady Elmer E Ewing |
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Institution: | (1) Department of Vegetable Crops, Cornell University, 14853-0327 Ithaca, NY, USA;(2) Present address: Yuma Mesa Agricultural Center, University of Arizona, Rt. 1, Box 40 M, 85350 Somerton, AZ, USA |
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Abstract: | Summary 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.
Paper No. 878, Department of Vegetable Crops, Cornell University. This research was supported through HATCH project NYS161414,
a contributing project to Regional Project NC150, and through HATCH project NYS161407. |
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Keywords: | Solanum tuberosum L photoperiod sucrose glucose fructose reducing sugars periderm crisp color chip color |
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