title: Observations on ectodesmata and the virus infection process.
mesh_terms: D002473:Cell Wall; D008628:Mercury; D008854:Microscopy, Electron; D010759:Phosphorus Isotopes; D010942:Plant Viruses; D010947:Plants, Toxic; D012367:RNA, Viral / Q000032:analysis; D012835:Silver Nitrate; D014026:Nicotiana / Q000166:cytology*; D014777:Virus Diseases
chemical_list: D010759:Phosphorus Isotopes; D012367:RNA, Viral; D012835:Silver Nitrate; D008628:Mercury