Pollen germination and pollen tube growth are important biological events in the sexual reproduction of higher plants, during which a large number of vesicle trafficking and membrane fusion events occur. When secretory vesicles are transported via the F-actin network in proximity to the apex of the pollen tube, the secretory vesicles are tethered and fused to the plasma membrane by tethering factors and SNARE proteins, respectively. The coupling and uncoupling between the vesicle membrane and plasma membrane are also regulated by dynamic cytoskeleton, proteins, and signaling molecules, including small G proteins, calcium, and PIP2. In this review, we focus on the current knowledge regarding secretory vesicle delivery, tethering, and fusion during pollen germination and tube growth and summarize the progress in research on how regulators and signaling molecules participate in the above processes.

花粉萌发和花粉管生长是高等植物有性繁殖中的重要生物学事件，在此期间发生大量的小泡运输和膜融合事件。当分泌囊泡通过F-肌动蛋白网络靠近花粉管的顶点运输时，分泌囊泡被束缚因子和SNARE蛋白分别束缚并融合到质膜上。囊泡膜和质膜之间的偶联和解偶联也受到动态细胞骨架，蛋白质和信号分子（包括小G蛋白，钙和PIP2）的调节。在这篇评论中，我们重点介绍有关分泌性小泡递送，栓系，