| 摘要 |
Disclosed is a plant cell having a up regulated plant 3Rmyb protein activity, as compared to the corresponding wild type plant cell, wherein said plant cell harbors, or has been transformed with, a DNA selected from the following (a) or (b), or a recombinant DNA construct or vector as set forth in the following (c) ; (a) a DNA coding for any amino acid sequence of plant 3Rmyb proteins: (b) a DNA which hybridizes, under stringent conditions, with a DNA coding for any amino acid sequence of the plant 3Rmyb proteins, and codes for a functionally equivalent protein to any of the plant 3Rmyb proteins; (c) a recombinant DNA construct or vector comprising the following (i) to (iii): (i) a promoter transcribable in a plant cell, (ii) a DNA wherein the DNA according to any of the above (a) or (b) is linked to said promoter sequence in a sense or antisense direction, and (iii) a signal for transcription termination and polyanedylation of an RNA molecule, wherein the plant 3Rmyb protein is a transcription factor for activating G2/M phase-specific transcription mediated by the MSA sequence.
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