title: An improved method using protoplast for cytophotometric measurement of nuclear DNA in plant tissue cultures.
mesh_terms: D002467:Cell Nucleus / Q000032:analysis; D046508:Culture Techniques; D003584:Cytological Techniques; D004247:DNA / Q000032:analysis*; D004171:Diploidy; D006238:Haploidy; D010783:Photometry / Q000379:methods*; D010947:Plants, Toxic; D011523:Protoplasts / Q000032:analysis*; D014026:Nicotiana / Q000032:analysis*
chemical_list: D004247:DNA