Fig. 4. Hypertrophy of smooth muscle cells in response to feeding a high-fibre diet. (A) Number of nuclei mm^–1 change in response to repeated switches from standard food (white areas) to the high-fibre diet (45% fibre, tinted area). Values are means ± S.D. (N=5); black symbols, experimental animals; white symbols, control. (B) Time course of hypertrophy of smooth muscle cells in response to the high-fibre diet. In A and B, the dotted lines refer to associated gizzard size changes (right axis) of experimental and control groups as reported in Starck (1999b). Mean values denoted by different letters differ significantly according to the REGWQ-test, P<0.001.

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