The diversity of the pollen tube pathway in plants: towards an increasing control by the sporophyte
70s Loose Flare Plants, unlike animals, alternate multicellular diploid and haploid generations in their life cycle.While this is widespread all along the plant kingdom, the size and autonomy of the diploid sporophyte and the haploid gametophyte generations vary along evolution.Vascular plants show an evolutionary trend towards a reduction of the g