Method for improving transformation efficiency of plant and method for transforming plant

A method for improving transformation efficiency of a plant, comprising:

• (a) introducing into a plant
• (1) a nucleic acid construct that comprises a nucleic acid encoding a polypeptide comprising the amino acid sequence according to SEQ ID NO:
• 2, and a promoter for producing said first nucleic acid in a plant, wherein said promoter is heterologous with respect to said nucleic acid;
• and
• (2) a desired nucleic acid to be expressed in the plant;
• and
• (b) selecting from a plurality of cells of said plant a transformed plant cell with an improved transformation efficiency, wherein the improvement comprises at least one improvement selected from the group consisting of:
• a) improvement of efficiency of callus formation of the plant;
• b) improvement of redifferentiation rate of the plant;
• and
• c) improvement of gene transfer efficiency.