ホウレンソウ類のカドミウム吸収に関わる品種間差の生育条件による変動とそれに基づく吸収程度の相対的序列の推定

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  • Studies on the Varietal Difference of Cadmium Uptake in Spinach (Spinacia oleracea ) and Swiss chard (Beta vulgaris var. cicla)
  • ホウレンソウルイ ノ カドミウム キュウシュウ ニ カカワル ヒンシュ カンサ ノ セイイク ジョウケン ニ ヨル ヘンドウ ト ソレニ モトズク キュウシュウ テイド ノ ソウタイテキ ジョレツ ノ スイテイ

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Three cadmium（Cd）-contaminated soils were filled into wood frames with about 35cm depth and 39 varieties of spinach and/or Swiss chard were grown in 2007 autumn and 2008 spring, 24 varieties for each cropping. Cd contents in edible part were analyzed by ICP-MS. Three varieties of Swiss chard showed the lowest Cd concentration. Among spinach varieties, the Cd concentration of the lowest varieties was around 50% comparing with that of the highest varieties, although the varietal order of Cd concentration changed appreciably when the growingenvironment was changed. Including retrospective analytical data up to 684 in total，the varietal difference of Cd uptake in spinach and Swiss chard were summarized as "Cd index" ± "fluctuation". Varieties "Mona Lisa", "Aspire", "Sun power", "Passion", "Hamburg", "Sunpia ten", "Ihatov", "Summer stage", "Titan", "Toukai" showed higher Cd content. Spinach varieties "Schmeiser", "Blade", "Jirou-maru", "Combat", "Atlas", "Yamato" and three varieties of Swiss chard showed the lower Cd content corresponding to 0.52 times lower value comparing with the higher ten varieties. Those varieties showing higher "fluctuation" like "Hamburg", "Actyon", "Orion", etc. may change their Cd uptake ability when the growing environment is changed.

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