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Effects of IAA, ZT, and GA3 on pollen tube growth in Torenia fournieri. Vertical bars represent standard errors in three independent experiments. Means denoted by the same upper-case letters and the same lower-case letters do not significantly differ at P < 0.01 and P < 0.05, respectively, according to the LSD (least significant difference) test. Comparison was made on the same treatment time.
