Analysis of duration and rate of average root growth in tmk mutants.

Wild-type plants were compared with tmk1;tmk4, and tmk;tmk3;tmk4 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