Seasonal changes in abiotic stress tolerance and concentrations of tocopherol, sugar, and ascorbic acid in sea buckthorn leaves and stems

Yoshinori Kanayama, Kazuyoshi Sato, Hiroki Ikeda, Tomoko Tamura, Manabu Nishiyama, Koki Kanahama

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Stress tolerance and stress-related metabolite concentrations were determined over different seasons in leaves and stems of sea buckthorn, which is believed to be a highly stress-tolerant plant compared with major deciduous fruit trees. Electrolyte leakage in sea buckthorn leaves reached a minimum of 20% or less at 51. °C, with an increase in temperature. In contrast, electrolyte leakage in sea buckthorn stems was less than 20% at -40. °C, during the coldest period, and was almost undetectable in January. A change in heat tolerance corresponded to an alteration of tocopherol concentration, whereas a change in freezing tolerance corresponded to changes in raffinose and ascorbic acid concentrations, which indicated winter-specific production, along with sucrose and glucose. Heat, drought, and freezing tolerance in sea buckthorn were higher than those in apple and pear; the higher heat and freezing tolerance may be related to tocopherol and sucrose and ascorbic acid concentrations, respectively. Because few studies have simultaneously investigated multiple stresses and metabolites across different seasons, this study, particularly involving the dramatic accumulation of ascorbic acid in winter and the role of tocopherol in heat tolerance, will provide new insights into a comprehensive understanding of stress acclimation in fruit trees.

    Original languageEnglish
    Pages (from-to)232-237
    Number of pages6
    JournalScientia Horticulturae
    Volume164
    DOIs
    Publication statusPublished - 2013 Dec 17

    Keywords

    • Abiotic stress
    • Ascorbic acid
    • Hippophae rhamnoides
    • Sugar
    • Tocopherol

    ASJC Scopus subject areas

    • Horticulture

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