A manufactured seed is disclosed which comprises a plant embryo preferably encapsulated, or at least in contact with, a hydrated oxygenated gel. The gel can be oxygenated by passing oxygen gas through a gel solution before curing the gel or by exposing the gel to oxygen gas after curing. The gel is...http://www.google.es/patents/US5687504?utm_source=gb-gplus-sharePatente US5687504 - Manufactured seed cotyledon restraint
