Presoaking seeds in water (hydropriming) or a solution, usually of polyethylene glycol (PEG) various salts at low potential (osmopriming), has been demonstrated to improve the germination numerous species including vegetables (carrot, celery, leek, lettuce, tomato), floral plants (cyclamen, primrose, pansy) and others (sugar beet, rape, soybean, sunflower). This treatment allows stricto sensu o...