Abstract: In order to investigate the function of LjCYC1 gene，floral symmetry gene LjCYC1 in Lotus japonicus was transformed into Saintpaulia ionantha，by using Agrobacterium-mediated transformation technology. Phenotypic observations showed as following：(1) The floral symmetry was obviously changed，the flowers of 14.3% transferred from actinomorphy to bilateral symmetry；(2) The corolla of 57.1% flowers crack deeply to the base，and the shape of petals changed，and number of petals reduced；(3) The stamens of 17.1% flowers conversed partially or whole into petal-like structures；(4) The pistil of 11.4% flowers conversed into petal-like structures or degenerated.

Key words: Saintpaulia ionantha, Lotus japonicus, LjCYC1, floral symmetry