Fig. 7. A mutation in TFL1 attenuates floral reversion in LFY:VP16 ag-1 plants. (A) tfl1-1 ag-1 inflorescence. The inflorescence has terminated with a single flower. Note that the most basal flower has formed in the axil of a leaf. (B) The floral phenotype of tfl1-1 ag-1, including that of this terminal flower, is the same as in ag-1 flowers. (C,D) Flowers from a strong LFY:VP16 ag-1 plant (either tfl1-1/TFL1 or TFL1/TFL1; not genotyped). After the flower has produced a variable number of whorls of organs, the floral meristem reverts to an inflorescence meristem (im), which produces only floral buds. (E-G) Modified flowers from a strong LFY:VP16 ag-1 tfl1-1 plant. Reversion to a true inflorescence that produces only secondary flowers is never observed, although the floral meristem produces many flowers interspersed with floral organs. In old flowers, fasciation is sometimes observed (G). Scale bars 1 mm (B,G,F), and 5 mm (A,C-E).