A transgenic crop plant transformed by a 1-AminoCyclopropane-1-Carboxylate
Deaminase-like Polypeptide (ACCDP) coding nucleic acid, wherein
expression of the nucleic acid sequence in the crop plant results in the
plant's increased root growth, and/or increased yield, and/or increased
tolerance to environmental stress as compared to a wild type variety of
the plant. Also provided are agricultural products, including seeds,
produced by the transgenic crop plants. Also provided are isolated novel
ACCDPs, and isolated novel nucleic acids encoding ACCDPs, and vectors and
transgenic plant containing the same.