Table I.

Phenotype of ap1-15 mutants expressing LtMADS1, LtMADS2, or LtMADS2′ under the control of the AP1 promoter

Transgene
NoneLtMADS1LtMADS2LtMADS2′
Whorl 1
 Total organs2.2 ± 0.32.5 ± 0.94.5 ± 0.32.8 ± 0.3
 Sepals0.00.2 ± 0.80.00.0
 Bracts2.0 ± 0.22.2 ± 1.04.3 ± 0.22.8 ± 0.3
 Filamentous organs0.1 ± 0.10.1 ± 0.30.2 ± 0.30.1 ± 0.1
Whorl 2
 Total organs1.0 ± 0.31.2 ± 1.12.6 ± 0.61.0 ± 0.2
 Petals0.00.00.00.01-a
 Petaloid bracts1.0 ± 0.31.2 ± 1.11.3 ± 0.61.0 ± 0.2
 Leaves0.00.01.3 ± 0.70.0
Whorl 3
 Total organs5.1 ± 0.35.2 ± 1.16.6 ± 0.55.7 ± 0.2
 Stamens4.1 ± 0.44.8 ± 1.15.7 ± 0.84.8 ± 0.3
 Mosaic stamens0.9 ± 0.40.3 ± 0.71.0 ± 0.70.9 ± 0.3
 Filamentous organs0.1 ± 0.10.2 ± 0.50.1 ± 0.20.1 ± 0.1
Flower No.28862284
2° Flowers/inflorescences1.6 ± 0.31.6 ± 0.10.3 ± 0.31.8 ± 0.1

Averages with 2 × se of the mean are given. Increased organ no. in whorls 1 and 2 and reduced no. of secondary flowers/inflorescences in LtMADS2, when compared with the other three genotypes, are statistically significant (Student'st test, p < 0.001).

    • F1-a  One petal in 84 flowers.