Accumulation of aluminium in the cell wall pectin in cultured tobacco (Nicotiana tabacum L.) cells treated with a combination of aluminium and iron

Y. C. Chang, Yoko Yamamoto, H. Matsumoto

    Research output: Contribution to journalArticlepeer-review

    140 Citations (Scopus)

    Abstract

    In nutrient medium, aluminium (Al) accumulation in tobacco cells occurs only in the presence of ferrous ion [Fe(II)]. The localization of Al was examined to elucidate a mechanism of Al accumulation. After the digestion of Al-treated cells with cellulase and pectolyase together, the resulting spheroplasts contained as much Al as the intact cells. However, the cell walls isolated from Al-treated cells also contained as much Al as the intact cells. Comparison of sugar and Al contents in polysaccharide components extracted chemically from cell walls isolated from intact cells and spheroplasts revealed that the enzymes digested most of the cellulose and hemicellulose, but only half of the pectin, and that Al mainly existed in the pectin remaining in the spheroplasts. Gel-permeation chromatography of the pectin fraction (NH4-oxalate extract) from the cell walls of the intact cells indicated that Al was associated with small polysaccharides of approximately 3-7 kDa. These results suggest that a minor part of pectin is a major site of Al accumulation. The content of cell wall pectin increased during Al treatment in nutrient medium. Taken together, we hypothesize that Al may bind to the pectin newly produced during Al treatment.

    Original languageEnglish
    Pages (from-to)1009-1017
    Number of pages9
    JournalPlant, Cell and Environment
    Volume22
    Issue number8
    DOIs
    Publication statusPublished - 1999

    Keywords

    • Aluminium localization
    • Cell wall
    • Iron
    • Nicotiana tabacum
    • Pectin

    ASJC Scopus subject areas

    • Physiology
    • Plant Science

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