IAA Biosynthesis Pathways in Arabidopsis Regulated by Cytokinin.
Putative IAA biosynthesis pathways in Arabidopsis, with genes shown to be differentially regulated in the microarray and/or qPCR analysis indicated (up,red; down, blue). Genes and pathways that are more strongly upregulated are indicated with red arrows and a pink background, respectively. A dotted arrow indicates that there is more than one enzymatic step involved in the pathway.