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Pollen tubes have dynamic tubular vacuoles. Functional loss of AP‐3, a regulator of one vacuolar trafficking route, reduces pollen tube growth. However, the role of canonical Rab5 GTPases that are responsible for two other vacuolar trafficking routes in Arabidopsis pollen tubes is obscure.
By using genomic editing, confocal microscopy, pollen tube growth assays, and transmission electron microscopy,...
The delivery of sperm cells via tip‐growing pollen tubes is an innovation of seed plants and shows the importance of pollen tubes for reproduction and their specific growth kinetics. Fast‐growing pollen tubes demand an extensive and dynamic vesicular trafficking network to build new cell membrane and wall, to deliver proteins among endomembrane compartments, and also to respond to external stimuli...