Table 1.

Influence of IAA on the diameter of in vitro pollen tubes in Torenia fournieri

Culture time (h)	Treatment	No. of pollen tubes	Diameter (μm)a
1	Control	210	11.61±1.83
	IAA	174	10.98±1.43**
2	Control	94	11.53±0.38
	IAA	82	8.07±0.03**
4	Control	115	8.83±0.25
	IAA	110	7.36±0.06**

Values given in the table are means and standard errors of three experiments. The analysis of significant variance was performed between the control group and IAA treatment according to Student's unpaired t-test. Comparison was made on the same treatment time.

^a** 0.001 < P < 0.01 indicates distinct difference.