FOSL2 and infection: According to the above, the objective of this work was to compare in situ for the first time the cell wall polysaccharides in the giant cells of both wild-type (Col-0) and the fra2 katanin mutant, both infected with M. incognita. An effort was made in order to understand in detail the structure of the cell walls of giant cells formed 21 days post-infection (21 dpi) with M. incognita. Also the role of the altered MT network and the fragility of the fra2 mutant was investigated.