Lai et al. have collected 1683 differentially expressed genes from 397 gene expression studies. This makes a molecular signature database of various genetic and environmental changes which cause alteration in gene expression. This database can be used to create and test hyopthesis related to plant molecular pathways using gene expression data. The databse is available at http://bioinformatics.sdstate.edu/arapath/. For more on AraPath, you can read the following reference:
Lai et al (2012) 28 (17) :Bioinformatics,2291-2292.