<i>abo8</i> mutation decreases the activity of the root meristem.

<p>A. The meristem zone (white line), elongation zone (blue line), and differentiation zone (green line) with 0 or 30 µM ABA treatment. Bars = 100 µm. Each image was made by joining several photographs of the same root. B. Meristem cell number of the wilt type, <i>abo8-1</i> and <i>abo8-2</i> in different times after seed germination (DAG). C. The meristem zone length, cell number, and cell length with 0 or 30 µM ABA treatment. D. The elongation zone length, cell number, and cell length with 0 or 30 µM ABA treatment. E. The differentiation zone length, cell number, and cell length with 0 or 30 µM ABA treatment. In C–E, two experiments were done with similar results, each with three repeats, each repeat with 10 roots. Values are means ±SE from one experiment. Means with different letters are significantly different at P<0.01. F. Size of the amplified root meristem in the wild type and <i>abo8-1</i> with and without ABA treatment. Bars = 50 µm. G. The expression of <i>ProCYCB1;1:GUS</i> in the wild type and <i>abo8-1</i> with or without 30 µM ABA treatment. Bars = 50 µm.