The present invention relates generally to the field of molecular biology and concerns a method for altering various aspects of plant growth and/or development by modulating expression in a plant of a nucleic acid encoding an UBiquitin-Specific Protease (UBP) of the UBP15 subfamily or a homologue thereof. The present invention also concerns plants having modulated expression of a nucleic acid encoding a UBP15 or a homologue thereof, which plants have altered growth and/or development relative to corresponding wild type plants or other control plants. The invention also provides constructs useful in the methods of the invention.
