Table 2. Trichome phenotype, length of actively dividing cells, and effects of exogenous auxin on lateral root growth.

Measurement	WT	mya2-1
Unbranched trichomes in percent of total trichome no. at cauline leaves	7.2 ± 3.1	48 ± 5.2
Trichome length, mm	0.94 ± 0.05	1.10 ± 0.04
Meristematic cell length in actively dividing cell files of root tips, μm	4.2 ± 0.26	5.5 ± 0.24
Primary root length of vertically grown 5-day-old seedlings, mm	15.2 ± 0.4	7.9 ± 0.3
No. of lateral roots per cm of root length of 11-day-old seedlings	1.5 ± 0.15	0.5 ± 0.20
No. of lateral roots per cm of root length after addition of auxin*	2.5 ± 0.7	3.2 ± 0.4
Lateral root length of seedlings after addition of auxin, mm*	1.9 ± 0.12	3.4 ± 0.93

Values shown are ± SE. All mutant values are significantly different (P < 0.05) from controls.

^*To test for effects of exogenous auxin on root growth, lateral roots were measured in 12-day-old seedlings that had been transferred to plates containing 10 μm auxin after 5 days of growing vertically on Murashige and Skoog medium agar.