A PROCESS FOR THE PRODUCTION OF TRANSGENIC PLANTS HAVING A HIGH STARCH CONTENT AND YIELD AND A HIGH AMYLOSE/AMYLOPECTIN RATIO

摘要

A process for the production of transgenic plants that have a high starchcontentand yield and a high amylose / amylopectin ratio. The alpha-1 ,4-glucanphosphorylases(GPs) catalyze the reversible cutting of bonds .alpha.-1, 4 of the non-reducing ends ofhomopolysaccharides with at least 5 glucose molecules such as starch,maltodextrin andglycogen, leading to production of glucose-1-phosphate. The GPs in bacteriaand animalcells are responsible for the breakdown of glycogen. Although the increase inGP activityleads to a reduction in intracellular levels of glycogen in bacteria andanimal cells, thisinvention discloses the production of plants that have high starch levels andyields andhigh amylose / amylopectin ratio, as result of the expression of genes codingfor GPs.