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Pollen Tube Guidance During Pollination and Fertilization in Plants
Jiang Jingjing1,2, Cao Jiashu1,2*
1Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou 310029, China; 2Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzh
Abstract: Pollen tube guidance happens when pollen grains germinate on the pistil to produce pollen tubes and than navigate the pollen tubes down the transmitting tract to fertilize the ovule in flowering plants. In general， pollen tube guidance has two distinct phases: sporophytic phase and gametophytic phase. Here we reviewed the functions of some distinct proteins and other small molecules during the sporophytic guidance phase and the potential roles of genes expressed in the different cells within the embryo sac and their related proteins in the gametophytic phase. In addition， the sperm involved in directing the pollen tube to its target was also included.
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