Deep Sequencing of the Pistil Transcriptome in the Cross Incompatible Maize

Plant reproductive development is dependent on successful pollen-pistil interactions. The high degree of specificity in pollen-pistil interactions and the precision of directional pollen tube growth suggest that signals are continually being exchanged between pollen tubes and cells of the pistil that line their path. However, with few exceptions, little is known about the genes that control these interactions. In this investigation, we performed genome-wide transcriptional profiling of pistil tissues of Gametophytic factor1-Strong (Ga1-S) genotype maize after pollination 5 hours(5HAP)with Ga1-S pollen and ga1 pollen respectively , in an attempt to isolate genes involved in pollen tube elongation in maize pistils, using the Solexa deep sequencing technology. The results of this study suggest that the regulation of reinforcing, modifying, or remodeling the structure of the transmitting tract and the pollen tube tip play a critical role in pollen-pistil interactions during pollen tube elongation in maize pistils, and the inhibition of these functions maybe the molecular mechanism of how Gametophytic factor1-Strong (Ga1-S) presence in style tissue completely prevents ga1 pollen to accomplish fertilization.