title: [Plant viroids: their properties and replication mechanism].
mesh_terms: D001483:Base Sequence; D008970:Molecular Weight; D010944:Plants / Q000382:microbiology*; D012313:RNA; D014772:Viroids / Q000032:analysis / Q000472:pathogenicity / Q000502:physiology*; D014779:Virus Replication
chemical_list: D012313:RNA