Table I.

Flavonoids move 2 times further from the application site when applied at the root tip than at midroot

No statistical differences exist between the mutant plants possessing the two alleles or the compounds in the basipetal direction. There is also no statistical difference in the acropetal direction for N, DHK, and DHQ and between the mutant plants possessing the two alleles.

Compound	tt4-1		tt4(2YY6)
	Basipetala	Acropetalb	Basipetala	Acropetalb
	mm
N	9.4 ± 0.4	4.2 ± 0.2	11.1 ± 0.8	4.2 ± 0.3
DHK	8.5 ± 0.5	4.3 ± 0.3	8.7 ± 0.4	3.9 ± 0.2
DHQ	8.4 ± 0.5	4.5 ± 0.2	7.6 ± 0.3	4.0 ± 0.3
K	8.3 ± 0.4	n.d.c	8.7 ± 0.6	n.d.c
Q	8.0 ± 0.4	n.d.c	7.3 ± 0.4	n.d.c

^aAverage and se from three combined independent experiments (n ≥ 17). Compounds were applied in an agar cylinder at the root tip for 1 h and DPBA stained, and fluorescence distance was measured from the application site.

^bAverage and se from three combined independent experiments (n ≥ 17). Compounds were applied in an agar cylinder 0.5 cm from root tip for 1 h, and roots were excised below agar line, DPBA stained, and fluorescence distance measured from the application site.

^cn.d., Not detected.