Overexpression of <i>PIZ</i> causes severe dwarf phenotypes.

<p>(<b>A</b>) 32-day-old wild-type (Col-0) and <i>35S:PIZ</i> seedlings. (<b>B</b>) Leaf size of 32-day-old Col-0 and <i>35S:PIZ</i> seedlings. (<b>C</b>) Light microscopic images of leaf mesophyll cells. (<b>D</b>) Flow cytometry analysis of first and second leaves from 17-day-old Col-0 and <i>35S:PIZ</i> seedlings. (<b>E</b>) Leaf and cell size of 21-day-old <i>35S:PIZ</i> seedlings. Values are shown relative to Col-0 and error bars represent ±SD of the means. n = 20 for leaves, n = 300 for cell size and n = 4 for cell number (p<0.0001, student’s t-test). Scale bars represent 1 cm in (<b>A</b>, <b>B</b>) and 50 µm in (<b>C</b>).