title: Permanent staining of callose in plant material by ponceau S.
mesh_terms: D002241:Carbohydrates / Q000032:analysis*; D010935:Plant Diseases; D010942:Plant Viruses; D010944:Plants / Q000032:analysis*; D010947:Plants, Toxic; D013194:Staining and Labeling; D014026:Nicotiana / Q000032:analysis
chemical_list: D002241:Carbohydrates