. 2003 Oct;133(2):761–772. doi: 10.1104/pp.103.022582

Table II.

Effect of light on hypocotyl basipetal transport of IBA and IAA

Auxin Transported	Low Light		Darkness
Auxin Transported	Control	+NPA	Control	+NPA
		pmoles transported^a
IAA	1.4 ± 0.2	0.54 ± 0.09^b	0.52 ± 0.04^b	0.43 ± 0.06^b
IBA	2.3 ± 0.3	2.2 ± 0.4	1.2 ± 0.1^b	ND^c

^a Average and se of 20 to 30 seedlings from two to three experiments. ^b Indicates values that were significantly different from low-light controls with P < 0.001 as determined by one-tailed Student's t test for control vs. 10^-4 m NPA and by two-tailed Student's t test for low light vs. darkness. IAA transport in darkness was not significantly different in the presence and absence of NPA with a P value > 0.05. ^c N.D., Not determined