Fuente: WIPO "tomato" Provided are a modified RNA demethylase, a nucleic acid encoding the modified RNA demethylase, the use thereof, a plant cultivation method, and a product. Compared with an original RNA demethylase derived from algae or invertebrates, the modified RNA demethylase is obtained by means of adding a specific peptide fragment sequence at the N-terminus or C-terminus of the original RNA demethylase. The modified RNA demethylase or the nucleic acid encoding the modified RNA demethylase is introduced into an initial plant to obtain a target plant having optimized traits compared with the initial plant.