Arabidopsis thaliana genes expressed in the early compatible interaction with root-knot nematodes

In the compatible interaction between Arabidopsis thaliana and the endopara sitic nematode Meloidogyne incognita, galls are formed on the roots of the host plant, Differential display was used to identify alterations of gene e xpression in young A. thaliana root gaits caused by M. incognita, Six genes were confirmed as plant genes by DNA gel blot hybridizations, Significant homology was found with a trypsin inhibitor, peroxidase, mitochondrial unco upling protein, endomembrane protein, 20S proteasome alpha -subunit, and di aminopimelate decarboxylase. The cellular and temporal expression of each o f the six genes was analyzed by mRNA in situ hybridizations.