| abstract |
Provided are compositions and methods for improving plant performance including transforming a plant with an isopentenyl transferase, a tryptophan monooxygenase or an indole acetamide hydrolase polynucleotide. Preferably, the plant is transformed with an ipt, iaaM or iaaH oncogene from Agrobacterium tumefaciens operably linked to a developmental stage-preferred promoter or a tissue-preferred promoter. Controllably expressing one or more of these polynucleotides in a plant results in increased drought resistance, increased root mass, increased seedling vigor or modulated branching. |