Cloning and Expression Analysis of ChWRKY2 from Corylus heterophylla under Low Temperature Stress ISOLATION, EXPRESSION AND ANTIBODY PREPARATION OF WRKY12 FROM Nicotiana Tabacum K326 LINE ADVANCES IN RESEARCH ON FUNCTION OF THE WRKY GENE FAMILY IN RICE CLONING AND EXPRESSION PROFILE ANALYSIS OF ChWRKY1 FROM Corylus heterophylla Fisch. Cloning, sequence analysis and prokaryotic expression of the WRKY6 of potato