1. 花粉在柱头上萌发和花粉管伸长 Pollen germination and pollen tube growth 1.1花粉萌发pollen gernimination 1.1.1花粉粘附在柱头上sticking and hydration 湿润型(the solid type,mostly present in dicotyledons) Biology of plant w reproduction Biology of plant reproduction 3 1. 花粉在柱头上萌发和花粉管伸长 Pollen germination and pollen tube growth 1.1 花粉萌发 pollen gernimination 1.1 .1 花粉粘附在柱头上sticking and hydration 湿润型(the solid type, mostly present in dicotyledons)