The invention relates to a method for expressing a desired protein or
polypeptide in a plant, in which the protein or polypeptide is expressed
as a fusion with at least one starch binding domain. The plant is
preferably a plant that contains or produces starch or starch granules in
at least one of its parts, such as potato, sweet potato, cassava, pea,
taro, sago, yam, banana and/or cereals such as rice, maize, wheat and
barley. The protein or polypeptide can be an enzyme, in particular an
enzyme that can convert, modify, alter, degrade or otherwise influence
starch (granules); or can be a receptor or a structural protein. The
invention further relates to the fusions thus obtained, to genetic
constructs that encode the above fusions and to plants transformed with
said constructs. The method of the invention can in particular be used to
provide modified starches and/or to provide complexes of starch
(granules) and the above fusions. In another embodiment, one or more
starch binding domains are expressed in a plant, to provide a plant
producing modified starches.