The present invention relates to a delivery platform that can be used to genetically modify a target in a plant or an alga. In one instance, polypeptides and/or polynucleotides can be delivered using silica delivery platforms, e.g., silica carriers or protocells. Such platforms can be employed to control gene activation and repression in the plant or alga.
STATEMENT OF GOVERNMENT INTEREST
 This invention was made with Government support under contract no. DE-AC04-94AL85000 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in the invention.