Response to Powdery Mildew and Detection of Resistance Genes in Wheat Cultivars from China Effects of Podosphaera xanthii Infection on Expression of PAL Gene in Different Resistant Varieties of Cucurbita pepo Studies on Transformation of Cauliflower with Disease Resistance-related Transcription Factor Gene(Pti4) Studies on Transformation of Cauliflower with Disease Resistance-related Transcription Factor Gene(Pti4) Transformation of TSRF 1 into Eucalyptus urophylla and the Broad-Spectrum Disease Resistance of the Transgenic Plant to Diseases Advances of NDR1 Gene Determined Broad-spectrum Disease Resistance in Arabidopsis Isolation and Characterization of IbNPR1 Gene from Sweet Potato(Ipomoea batatas