Oxidative stress, growth factor production and budding in potato tubers during cold storage

Massimo Reverberi, Mauro Picardo, Alessandra Ricelli, Emanuela Camera, Corrado Fanelli, Anna Adele Fabbri

Research output: Contribution to journalArticle

Abstract

In order to verify the role played by oxidation in the budding of potato tubers (Solanum tuberosum L. cv. Kennebec), the physiological events occurring below bud at 4°C have been studied for a period of 6 months. The low temperature storage induced an increase in the degree of unsaturation and a decrease in the ratio of saturated/unsaturated fatty acids of membrane polar lipids with a subsequent increase of lipid hydroperoxides (LOOH). Cold stress increased both enzymatic antioxidative activities (superoxide dismutase, SOD, E.C.1.15.1.1; catalase, CAT, E.C. 1.11.1.6), and α-tocopherol levels thus protecting membrane's polyunsaturated lipids. Between 0 and 15 days of storage SOD/CAT ratio, α-tocopherol, LOOH levels and the degree of lipid unsaturation showed strong variations. After 30 to 120/150 days the antioxidative system seemed to reach a homeostasis different from that of time 0, accompanied by a constant increase of indole-3-acetic acid (IAA) after 60 days. The antioxidative system, after 150 days, lost its efficiency while LOOH levels were maintained higher than time 0 and IAA concentration was sufficient to allow sprouting.

Original languageEnglish
Pages (from-to)833-841
Number of pages9
JournalFree Radical Research
Volume35
Issue number6
Publication statusPublished - 2001

Keywords

  • α-tocopherol
  • Catalase
  • Indole-3-acetic acid
  • Lipid hydroperoxides
  • Potato tuber
  • Superoxide dismutase

ASJC Scopus subject areas

  • Biochemistry

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