Figure 2.

Several EXO70 isoforms are expressed in tobacco pollen and growing pollen tubes. Semiquantitative RT-PCR analysis is shown for the EXO70 family in tobacco imbibed pollen (IP), germinating pollen (GP), and growing pollen tube (GPT), with genomic DNA (Gen) used for the control amplification. Actin (ACT) was amplified as a control from the same premix solution. The image shown was assembled from two independent experiments for each tissue. Combinations that did not result in the presence of an active band are represented by blank spaces.