Fig. 8. Birefringent retardation versus distance from the quiescent center in cell walls of wild-type and mutant roots. (A,B) Wild type; (C) rsw4; (D) rsw7. (A,C,D) Data for seedlings grown for 8 days at 19°C (open circles), and seedlings grown for 6 days at 19°C and transferred to 30°C for 2 days (filled circles). (B) 8-day wild-type roots treated with 1 µM DCB for 12 hours at 30°C (filled triangles), and 8-day rsw1 roots exposed to 30°C for 12 hours (filled squares). (B,C,D) The dotted line indicates the wild-type 30°C data from A. For each treatment, three sections from four roots were sampled, and symbols are means±s.d. of six to 21 cell walls located within 50 µm of the x-axis value.

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