Analysis of duration and rate of average root growth in <i>tmk</i> mutants.

<p>Wild-type plants were compared with <i>tmk1;tmk4</i>, and <i>tmk;tmk3;tmk4</i> mutants (n = 20). Cell size and cell number from the cortical cell file along different zones of roots were measured for each genotype. Numbers indicate the average ± standard deviation. The average growth rate = [ln(final cell size)−ln(initial cell size)]/residence time. Values that are significantly different (p<0.01) from wild type are labeled with an asterisk.