Figure 4
Scatterplot of EST frequencies compared with microarray expression levels. Log2-transformed frequency distributions of ESTs from mixed stressed leaf (e.g., water deficit, NaCl, heat, high light) and berry (water deficit stress) and unstressed leaf and berry tissue were compared to 184 Affymetrix® Vitis GeneChip® log2-abundance ratios of chilling, osmotic (mannitol), and salt stress, and water-deficit-stressed leaf [10, 31] and water-deficit-stressed whole berry tissues [24]. Differences in gene model EST frequencies between stressed and unstressed library pairs (i.e., stressed berries compared with unstressed berries) were plotted along a log2 scale as well. The Spearman rank correlation, r s , was 0.2047, with likelihood P = 0.005). Filled and gray circles indicate agreement and disagreement in directional concordance, respectively. The total number of genes present in each Cartesian quadrant are shown in gray-shaded boxes.