Acropetal differentiation of the cambium layer continues as the primary root elongates.

形成层的向顶分化像初生根伸长一样在继续进行。

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The starch of hard species disappeared completely, content of sugar were high fat and lipids were concentrated cambium layer.

其中，抗寒种类淀粉粒小且水解彻底，还原糖含量高，脂类物质在形成层处高度聚集。

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For the mesenchymal stem cell marker profiles, cambium layer and cartilage layer all expressed higher chondroprogenitor related marker profiles.

在细胞表面标志上，年轻与成年兔形成层及软骨组织表现较多具软骨分化潜力之细胞标志。

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