Figure 3

Cluster analyses of VvWRKY s from 16 k Affymetrix V. vinifera gene-chip data in PLEXdb database. The relative expression values of 26 VvWRKYs responding to different abiotic stresses (salinity, water deficit, cold) were used in analysis. Red, black and green elements in the matrix indicate up-regulated, no change and down-regulated WRKY genes, respectively. Those genes can be classified into four groups according to expression patterns, which were shown in different color with its group IDs that coincide with Figure 1. The red color was used to emphasize the VvWRKYs that changed in expression over 2 fold under cold treatment.