以下为句子列表：
英文: In cultivated Salvia miltiorrhiza roots, light-colored periderm contained less layers of cells and low ratio of phloem to xylem, compared with those in wild Salvia rniltiorrhiza roots.
中文: 栽培丹参根的周皮细胞层数少、色淡，韧皮部与木质部比值小，而野生丹参根的周皮细胞层数多、颜色重，韧皮部与木质部比值大。
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