#$%^&*AU2011232795B220150528.pdf#####Nicotiana Nucleic Acid Sequences And Uses Thereof Abstract The present invention features Nicotiana nucleic acid sequences such as sequences encoding constitutive, or ethylene or senescence induced polypeptides, in particular cytochrome p450 enzymes, in Nicotiana plants and methods for using these nucleic acid sequences and plants to alter desirable traits, for example by using breeding protocols.