Table I.

Transport of IAA and IBA in wild-type and rib1 tissues

Transport Assay	Auxin Transporteda		P Valueb
	Wild Type	rib1
Hypocotyl basipetalce
IAA	3.6 ± 0.4	3.2 ± 0.2	0.40
IBA	3.1 ± 0.3	1.8 ± 0.2	1.51 × 10−3
Root basipetalc
IAAf	2.0 ± 0.1	1.8 ± 0.1	0.14
IBAg	9.9 ± 0.6	7.4 ± 0.5	1.66 × 10−3
Root acropetalcg
IAA	9.3 ± 0.6	10.4 ± 0.6	0.22
IBA	17.1 ± 0.9	30.4 ± 1.4	1.55 × 10−13
Inflorescence basipetalde
IAA	1.1 ± 0.1	1.3 ± 0.1	0.22
IBA	0.04 ± 0.005	0.04 ± 0.006	0.67

^aAverage and standard error of the mean are presented.

^bTwo-tailed Student's t test assuming equal variance.

^cTransport is reported in fmol.

^dTransport is reported in pmol.

^en values are from three experiments with 15 to 30 plants.

^fn values are from 134 to 136 plants from 14 experiments.

^gn values are from six to eight experiments with 59 to 82 plants.