PROBLEM TO BE SOLVED: To provide a method for increasing the resistance to rice plant pathogenic microorganisms and provide a rice plant transformant that has the resistance to the pathogenic microorganisms.SOLUTION: In rice plant, a method for increasing the resistance to rice plant pathogenic microorganism that includes the increase of the expression level of at least one kind of gene relating to the biological defense bearing a specific base sequence or at least one kind of its mutant genes is provided. Further, the pathogenic microorganism resistant rice plant transformant in which at least one kind of gene such as biological defense relating gene or at least one kind of gene can ecdemicly and expressibly introduced.COPYRIGHT: (C)2008,JPO&INPIT【課題】イネの病原菌に対する抵抗性を高める方法、及び病原菌に対する抵抗性を有するイネ形質転換体を提供する。【解決手段】イネにおいて、特定の塩基配列を有する生体防御関連遺伝子またはその変異遺伝子の少なくとも1種の遺伝子の発現レベルを高めることを含む、イネの病原菌に対する抵抗性を高める方法、及びこのような生体防御関連遺伝子またはその変異遺伝子の少なくとも1種の遺伝子が外来的にかつ発現可能に導入されたことを特徴とする、病原菌耐性イネ形質転換体。【選択図】なし