A method for protecting a plant from high temperature stress (HTS),
comprising transforming the plant with a polynucleotide sequence. The
polynucleotide sequence comprises a nucleotide sequence encoding a sugar
kinase under the control of an anther and/or pollen specific promoter,
thereby producing a transformed plant having improved tolerance to HTS.
Also disclosed is the polynucleotide sequence of the LeFRK4 promoter.