Figure 9.

GA₃ treatment of potato wild-type and StSUT4-RNAi plants grown under LD conditions in the greenhouse. A, Source leaves were treated with 20 μm GA₃ solution every 2 d over a period of 2 weeks. Flowering was analyzed after the indicated period of time. B, Tubers were harvested after 2 months of growth in the greenhouse. Water-treated StSUT4-RNAi plants show higher tuber yield than water-treated wild-type plants due to increased tuber size, whereas GA₃-treated StSUT4-RNAi plants show higher tuber number and tuber size than the wild-type control. C, Internode elongation of potato wild-type and StSUT4 plants treated with GA₃ or paclobutrazol. Error bars indicate sd.