title: In vitro culture of tobacco protoplasts: use of feeder techniques to support division of cells plated at low densities.
mesh_terms: D002452:Cell Count; D002455:Cell Division / Q000528:radiation effects; D002478:Cells, Cultured; D002999:Clone Cells; D046508:Culture Techniques; D004171:Diploidy; D006238:Haploidy; D010947:Plants, Toxic; D011523:Protoplasts / Q000166:cytology* / Q000528:radiation effects; D011830:Radiation Effects; D014026:Nicotiana