Rosette plants, main root thickened, to 4 mm in diameter.

莲座状植物，主根增粗，直径4毫米。

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Results showed that the root dry weight, root weight density, root length, root length density and root diameter were increased with the evolution of the cultivars at main growth stages.

结果表明，在各主要生育期，根干重、根重密度、根长、根长密度和根直径随品种演进增加或显著增加。

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The anatomy structure photos of primal root showed the stronger drought-resistance varieties had the bigger diameter of primal root, the thicker cortex and smaller diameter of the main xylem vessel.

初生根解剖结构分析表明，抗旱性强的品种表现为初生根直径大，皮层厚，中央大导管直径小。

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