Effect of Some Chemicals on Infectivity and Replication of Citrus Exocortis Viroid
Abstract: Gynura aurantiaca plants infected by citrus exocortis viroid (i.e. CEV) were applied in different concentrations of exogennous gibberellin (GA,5ppm, 10ppm, 50ppm, 100ppm, 200ppm), n(?)phthalen (Nal., 100ppm, 300ppm), 5-flurouracil (5-FU, 0.5mg/L, 1mg/L, 2mg/L) solutions respectively. It was found that the relative infectivity indexes of plants had to some extent been changed. Nucleic acids of young leaves were extracted and subjected to 5% bidirectional polyacrylamide gel electrophoresis (PAGE) followed by ...