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

研究成果査読

166 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1009-1017
ページ数9
ジャーナルPlant, Cell and Environment
22
8
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • 生理学
  • 植物科学

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