The present invention relates generally to methods for generating plants having altered phenotypes, and to plants so generated and parts of these plants. More particularly, the present invention relates to a method for modifying a plant so as to produce a plant exhibiting an altered phenotype. Particularly useful altered phenotypes contemplated by the present invention include plants having altered tissue architecture. The present invention further contemplates genetic sequences capable of facilitating the modification of a phenotype of a plant and to sequences complementary thereto and to derivatives of the sequences. Plants and parts of plants, such as flowering and reproductive parts including seeds, also form part of the present invention. The ability to modify the phenotype of a plant may be useful for, inter alia, producing plants with more highly desired characteristics, such as delayed flowering, increased lateral branching, delayed senescence and the like.