Abstract:
A transgenic plant transformed by a Dof transcription factor, OBP3, coding nucleic acid, wherein expression of the nucleic acid sequence in the plant results in an alteration in the size of the resulting plant as compared to a corresponding wild-type variety of plant. Also provided are agricultural products, including seeds, produced by the transgenic plants. Further provided are isolated OBP3's, isolated nucleic acid coding OBP3's, and vectors and host cells containing the latter.
Abstract:
The present invention provides cytochrome P450s useful for producing genetically modified plants characterized as having the phenotypic trait of modulated brassinolide synthesis of signaling, for example, resulting in insect resistance, dwarfism and darker-green foliage compared with wild type plants. Such plants can be modified, for example, using "bas1", or functional homologues thereof, a polypeptide encoded by bas1 that modulates brassinolide synthesis and/or signaling in plants. The invention also provides methods for modulating ecdysteroid activity in a plant and for assaying brassinosteroid function in a plant. The latter method can be used to create a gain-of-function allelic series of plants characterized by increasing levels of overexpression of a cytochrome P450 to screen for brassinolide activity in plant species.