Comparative study of wood anatomical structure of two successful poplar clones (Populus deltoides77/51 & 69/55) in Guilan

Some poplar species and clones were imported to Iran and cultivated in Guilan through recently decades. Among them, some clones like Populus deltoides 77/51 and P.d.69/55 had wood production more than the other clones after their compatibility. So, poplar plantation developed broadly. Anyway, fundamental investigation like anatomical characteristics have not found out yet. In this research, Anatomical structure of clones analyzed after preparation triple section (cross, radial, tangential) with IAWA method standard. Results showed numerous structural similarities between two clones. The woods of two clones are semi-porous (diffuse and porous). Vessels lumens are seen in radial direction in different groups forms single or linked together as two, three and foursome. In spite of these similarities, embassy difference is seen at latewood.