Applications of microfluidics for studying growth mechanisms of tip growing pollen tubes

Pollen tube, the fastest tip growing plant cell, plays essential role in life cycle of flowering plants. It is extremely sensitive to external cues and this makes it as a suitable cellular model for characterizing the cell response to the influence of various signals involved in cellular growth metabolism. For in-vitro study of pollen tube growth, it is essential to provide an environment the mimics the internal microenvironment of pollen tube in flower. In this context, microfluidic platforms take advantage of miniaturization for handling small volume of liquids, providing a closed environment for in-vitro single cell analysis, and characterization of cell response to external cues. These platforms have shown their ability for high-throughput cellular analysis with increased accuracy of experiments, and reduced cost and experimental times. Here, we review the recent applications of microfluidic devices for investigating several aspects of biology of pollen tube elongation.