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RSA becomes determinate in the shr mutant. A and B, 3D x-ray microtomography analysis of RSA of 3-week-old soil-grown shr (A) and wild-type (B) seedlings grown in a sandy loam soil. Bars = 1 mm. C, Quantitative description of root architecture extracted from A and B. WT, Wild type. D, RSA of 4-week-old compost-grown wild-type and shr seedlings. Bar = 1 cm. E, RSA of 12-d-old agar-grown wild-type and shr seedlings. Bar = 1 cm.
