Figure 6.

Additive effects on leaf and root growth by crossing of P10-CKX3- and AVP1-overexpressing plants. A to C, Shoot growth of 22-d-old plants grown in soil. A, Rosette fresh weight. B, Photographs from the rosettes of the wild type (Col-0), the heterozygous parents, and the cross. C, Blade area of cotyledons (0) and leaves 1 to 12 calculated from leaf series. D and E, Root phenotypes of plants grown on vertical plates under in vitro conditions for 9 d. D, Primary root length. E, Lateral root number. Values expected for an additive effect were calculated as the sum of Col-0×P10-CKX3 and Col-0×AVP1 minus Col-0. Asterisks indicate values significantly different from the wild type (*) and from the value expected for an additive effect (**) by Student’s t test (P < 0.05 [A–C] and P <0.01 [D and E]). Error bars indicate se (n ≥ 12 [A–C] and n ≥ 23 [D and E]).