alpha-Ketol-Octadecadienoic Acid (KODA) and the Expression of MdTFL1 and MdFT1 in Apples

The effects of alpha-ketol-octadecadienoic acid (KODA) application on the expression of MdTFL1 and MdFT1 genes were investigated in 'Fuji' apple trees (Malus domestica Borkh.). KODA application decreased the expression of MdTFL1 at 49 days after full bloom (DAFB), but it did not have a clear effect on the expression of MdFT1 from 21 to 91 DAFB. KODA application did not influence endogenous gibberellic acid (GA) concentrations in apical buds. These results show that KODA may be related to flower bud formation through its influence on MdTFL1.