3.6 Fld-regulated genes whose expression was unaffected by drought
Of the 1675 genes whose expression was modified by Fld presence under normal growth conditions (Figure 3; Supplementary Table S2), 1336 (~80%) were also affected by water limitation, and distributed among various clusters described below. The remaining 339 genes responded solely to Fld presence and were grouped in clusters 3 and 4 (Supplementary Figure S6, Supplementary Table S5). Most of these Fld-responsive genes were induced, constituting cluster 3 with 221 members and conspicuous over-representation of the ubiquitin (Ub)-proteasome system. Cluster 4 contained 88 genes repressed by the flavoprotein, with amino acid degradation, metal handling and cytokinin signal transduction representing enriched functional categories (Supplementary Figure S6; Supplementary Table S5).