Structures resembling nuclear pores at the orifice of nuclear invaginations in developing microspores of Pinus banksiana.
D002467:Cell Nucleus; D003593:Cytoplasm; D004247:DNA; D008854:Microscopy, Electron; D011058:Pollen / Q000166:cytology*; D013170:Spores / Q000166:cytology*; D014197:Trees
D004247:DNA