Over-represented functional categories in downregulated gene lists.

Bold text indicates a significantly over-represented category (with a P value<0.05). aNumber of genes in the category in whole genome. bNormalized Frequency is calculated as follows: (Number_in_Classinput_set/Number_Classifiedinput_set)/(Number_in_Classreference_set/Number_Classifiedreference_set). Downregulated genes from each class were classified with an Arabidopsis web-based classification tool, Functional Classification SuperViewer [21]. Functional categories with P values<0.05 in at least one class are shown in the table.