Delayed Floral Transition of Axillary Shoots in ft and ft tsf Mutants and Genetic Interaction with brc1.

(A) Number of leaves formed on the axillary shoots at the five axil positions of the wild type (Col) and brc1-2, ft-2, and brc1-2 ft-2 mutants grown in LD. Error bars indicate the sd (n = 12 for Col and brc1-2; n = 24 for ft-2 and brc1-2 ft-2). The differences significant between ft-2 and brc1-2 ft-2 in two-tailed multiple t test with Bonferroni correction (P < 0.05) are indicated with asterisks. ARL, axillary rosette leaves; CL, cauline leaves.

(B) Representative plants of ft-2 and brc1-2 ft-2 mutants grown in LD for 60 d Arrows indicate elongated axillary shoots at rosette axils.

(C) Number of leaves formed on the axillary shoots at the three axil positions of the wild type (Col) and brc1-2, ft-2 tsf-1, and brc1-2 ft-2 tsf-1 (triple) mutants grown in LD. Error bars indicate the sd (n = 12). The differences significant between ft-2 tsf-1 and brc1-2 ft-2 tsf-1 in two-tailed multiple t test with Bonferroni correction (P < 0.05) are indicated with asterisks.

(D) Axillary shoot phenotype of ft-2 tsf-1 and brc1-2 ft-2 tsf-1 mutants. Top panel shows the rosette part of the plants, and bottom panels show the uppermost rosette leaf with the axillary bud or shoot. Note that most of the primary rosette leaves on the main axis were decaying or senescent. Arrowheads in the bottom panels indicate the senescent rosette leaves. Bars = 5 mm.

Designation of the axil positions and classification of leaves in (A) and (C) are as in Figure 4.

[See online article for color version of this figure.]