Isolation and characterization of an RNA-dependent RNA polymerase from Nicotiana clevelandii plants infected with red clover necrotic mosaic dianthovirus

arn dianthovirus dianthoviruses enfermedades de las plantas maladie des plantes molecular genetics nicotiana ornamental plants pathogens plant diseases plant viruses plantas estimulantes plantas ornamentales plante ornementale plante stimulante rna stimulant crops tabac tabaco tobacco transferasas transferase transferases virus virus de las plantas viruses