Transgenic plant exhibiting enhanced growth and method for producing same

A transgenic plant with an enhanced growth as compared to a host plant, the transgenic plant comprising a gene encoding a chimeric protein comprising:

• a first peptide comprising an amino acid sequence of a plant 1 motor domain, the plant 1 motor domain being a motor domain of a myosin XI protein of a donor plant 1 which is a plant species other than the host plant;
• and
• a second peptide comprising an amino acid sequence of a plant 2 domain, the plant 2 domain comprising a neck domain, a rod region, and a globular tail domain of a myosin XI protein of a donor plant 2 or a host plant,
• wherein the plant 1 motor domain has a peptide having any one of the following amino acid sequences (i) to (iii):
• (i) the amino acid sequence represented by any one of SEQ ID NOs:
• 14, 16 and 18;
• (ii) an amino acid sequence having 85% or more identity with the amino acid sequence represented by any one of SEQ ID NOs:
• 14, 16 and 18;
• and
• (iii) an amino acid sequence in which 1 to 6 amino acids in the amino acid sequence represented by any one of SEQ ID NOs:
• 14, 16 and 18 are deleted, substituted, and/or added,
• wherein the loop 2 region of the plant 1 motor domain has the amino acid sequence:
• EEPKQGGKGGGKSSFSSIG (SEQ ID NO:
• 36) or EEPKQGGGKGGSKSSFSSIG (SEQ ID NO:
• 37),
• wherein the velocity of movement of the plant 1 motor domain alone in an in vitro motility assay, in which the plant 1 motor domain binds to and moves on actin, is 4 times or more compared to the velocity of movement of a motor domain alone of a myosin XI protein of host plant that does not comprise a gene encoding said chimeric protein in an in vitro motility assay.