User:Assia Dhaker/Morphology of Nitrosomonas

In 1960,M.S ENGEL described in his aricle "Morphology of Nitrosomonas Europaea and Classification of the Nitriyfing Bacteria" Nitrosomonas europaea and compared it to Nitrosomonas monocella. Nitrosomonas Europaea is a rod, forming small, sharply defined brown colonies on solid media.Based on the description of Bergey's Manual N.monocella is an ovoid with yellowish brown, irregular colonies in silica gel.

M.S ENGEL also found out  that the criteria of size and shape are not valid to differ these two species.

Nitrosomonas have a fine structure and there are three basic morphological types of Nitrosomonas species were founed (W. WATSON AND MANDEL,1971) which are: short rods Nitrosomonas, Rods Nitrosomonas and Nitrosomonas with pointed ends.

Cells of Nitrosomonas species have a polyhedral inclusion bodies which are present in both growing and resting cells.These bodies are located in the nucleo-plasm  (WULLENWEBER et al, 1977).