Effect of OsFIE1 overexpression on mature seed size and the duration of the syncytial stage of the endosperm. A, Comparison between mature seed of rice wild type (WT) and three independent transgenic plants overexpressing OsFIE1. B, Length. C, Width. D, Weight. Controls for seed size and weight measurements are seeds obtained from the wild-type cv Kitaake plants grown under the same conditions and times as transgenic lines (n > 30 for all lines). E, Relative gene expression of OsFIE1 in seeds of transgenic lines and the wild type. F, Section from control seeds (28°C) harvested at 48 HAF. G, Sections from OE-OsFIE1 seeds harvested at 48 HAF. Bar in F = 200 µm. Bar in G = 100 µm.