Fig. 3.
Increased seed abortion and reduced seed yield in FUS3 phospho-null mutants. (A) Bolting time of wild-type, fus3-3, FUS3S>A, and FUS3S>D plants. Averages of 15–20 plants ±SEM (P<0.01) per genotype are shown. Arabidopsis plants were grown under long days at 21 °C/18 °C. (B) Seed yield of FUS3S>A and FUS3S>D plants grown under long days at 21 °C/18 °C. Averages ±SD of total dry seed yield from eight plants grown in two pots is shown (P<0.01). (C) Representative picture showing seed morphology in yellowing siliques. fus3-3 and FUS3S>A show aborted seeds (empty spaces indicated by*). (D) Frequency of seed abortion in F1 progeny from reciprocal crosses (♀ × ♂) between FUS3 and FUS3S>A. The total number of seeds per silique (bottom) and frequency of aborted white or brown seeds are shown (top). (E) Representative picture showing normal, aborted white (unfertilized), and brown (fertilized) seeds. (This figure is available in colour at JXB online.)