Figure 6.

Suppression of APY1 expression in apy2 plants suppresses growth of hypocotyls and roots. A, Suppression of growth in etiolated hypocotyls of apy2 plants expressing an RNAi construct for APY1. The hypocotyl length was measured in 3.5-d-old seedlings that had been grown the entire time in estradiol to silence APY1. Different letters above the bars indicate mean values that are significantly different from one another (P < 0.01; n > 20). B, Suppression of root growth in light-grown apy2 plants expressing an RNAi construct for APY1. Growth was assayed from days 3 to 6 of RNAi lines (R2-17E, R2-14D, and R2-4A), wild-type (Ws), and apy2 mutant lines. Different letters above the bars indicate mean values that are significantly different from one another (P < 0.01; n > 20). C, Difference in root length between estradiol-treated and not treated RNAi lines, wild type (Ws), and apy2 from days 3 to 6.