The powdery mildew disease caused by Blumeria gramminis.DC.f.sp.tritici is one of the
most important diseases of wheat. Accompanying with the resistance loss of cultivar
containing Pm resistance gene, wheat may face epidemic risk of powdery mildew in China.
Now people are looking for new methods for the disease control, the most important advance
is systemic acquired resistance(SAR),SAR is defined as an increase in the resistance level
without any change of genet...