<p><P>PROBLEM TO BE SOLVED: To provide a practical high-temperature-tolerance inducing agent for plants easily applicable to agriculture field sites, and a method for easily inducing high-temperature-tolerance. <P>SOLUTION: The high-temperature-tolerance inducing agent for plants includes, as an active component, a compound represented by formula (I) (wherein R<SB>1</SB>represents hydrogen, hydroxy or 1-9C alkyl; and R<SB>2</SB>represents hydrogen or 1-5C alkyl). The method for inducing high-temperature-tolerance includes a step of treating plants with the high-temperature-tolerance inducing agent. <P>COPYRIGHT: (C)2011,JPO&INPIT</p>