Plant reproduction
supernumerary pollen tubes. Arrowhead, pollen tube, asterisk, embryo. B) Schematic model of dual and opposing roles of EIN3 during seed growth. EIN3 is a repressor of supernumerary pollen tube attraction and [...] plants, sperm cells are delivered by pollen tubes, which are attracted by two egg-cell-adjoining synergids. Successful fertilization terminates pollen tube attraction. We have shown that the process of [...] endopeptidases and loss-of-function is associated with a fertilization defect, supernumerary pollen tube attraction and increased polyspermy frequency. Intriguingly, ecs1 ecs2 double mutants also induce