Figure 3.

Expression patterns of genes selected after the initial characterization. Reverse Northern analysis consisted of replicate membranes harbouring PCR products of cDNA clones hybridized with ³²P‐labelled cDNA probes derived from Beta vulgaris healthy (H panels) or infected (A4 panels) root mRNAs. The identifier of each cDNA indicated on the top is also reported in Table 1. A viral sequence (V) was used as a positive control for hybridizations.