BLBS102-c32 BLBS102-Simpson March 21, 2012 14:2 Trim: 276mm X 219mm Printer Name: Yet to Come
Table 32.2.Summary of Transgenic Approaches to Manipulate Starch Structure and Yield in Potato TubersTransgenicStarchGrain/TuberTargetApproachContent/ YieldStarch StructureMorphologyApplicationReferencePlastidial ATP/ADPtranslocatorAntisense inhibition Starch contentdecreased to 20%Less amyloseGrains sizedecreased to 50%,strange tubershape—Tjaden et al. 1998Plastidial ATP/ADPtranslocatorOverexpression ofAATPStarch contentincreased by up to30%More amyloseGrains with angularshapeHigh starch withmore amyloseTjaden et al. 1998,Geigenbergeret al. 2001Plastidial adenylatekinaseAntisense inhibition Starch content andyield increased byup to 60%Not determinedNot determinedHigh starchRegierer et al. 2003ADPGlc pyro-phosphorylaseAntisense inhibitionof AGPBStarch contentdecreased down to10% of WT-levelAmylose contentdecreased by 40%Smaller grains,smaller tubers,increased tubernumber—M̈uller-R̈ober et al.1992, Lloyd et al.1999bADPGlc pyro-phosphorylaseOverexpression ofglgCStarch contentincreased by up to30%Not determinedNot determinedHigh starchStark et al. 1991Granule boundstarch synthaseAntisense inhibitionof GBSSINo effectStarch is free ofamyloseNo effectAmylose free starch Kuipers et al. 1994620