TABLE 1.
Direct regulation of stress hormone biosynthesis and signaling by core components of the Arabidopsis circadian clock.
| Hormone | Gene ID | Gene name | Role | TOC1 target | PRR5 target | PRR7 target |
|---|---|---|---|---|---|---|
| JA | AT1G17420 | LOX3 | JA biosynthesis | Y | N | N |
| JA | AT1G72520 | LOX4 | JA biosynthesis | Y | N | N |
| JA | AT3G45140 | LOX2 | JA biosynthesis | Y | N | N |
| JA | AT1G19180 | JAZ1 | Repressor of JA-responsive genes | Y | N | N |
| JA | AT1G70700 | JAZ9 | Repressor of JA-responsive genes | Y | N | N |
| JA | AT5G11270 | OCP3 | JA signaling | Y | N | Y |
| JA | AT1G25540 | PFT1 | Regulator of JA responses | N | Y | N |
| JA | AT1G80840 | WRKY40 | JA-responsive transcription factor | N | Y | N |
| JA | AT3G06490 | MYB108 | JA-responsive transcription factor | N | Y | N |
| JA | AT1G52890 | ANAC019 | JA-responsive transcription factor | N | Y | N |
| ET | AT4G11280 | ACS6 | ET biosynthesis | Y | N | N |
| ET | AT5G03280 | EIN2 | ET signaling | Y | N | N |
| ET | AT5G47230 | ERF5 | ET-responsive transcription factor | Y | N | N |
| ET | AT1G53170 | ERF8 | ET-responsive transcription factor | Y | N | N |
| ET | AT4G39403 | PLS | Negative regulator of ET signaling | N | Y | N |
| ABA | AT5G13630 | ABAR | Putative ABA receptor | Y | Y | N |
| ABA | AT5G59220 | PP2C:HAI1 | Catalytic subunit of ABA receptor | N | Y | N |
| ABA | AT3G11410 | PP2CA/AHG3 | Catalytic subunit of ABA receptor | Y | Y | N |
| SA | AT2G41010 | CAMBP25 | Regulation of SA biosynthesis | Y | N | N |
| SA | AT1G20020 | LFNR2 | Regulation of SA biosynthesis | N | Y | N |
| SA | AT3G56710 | SIB1 | Regulation of SA biosynthesis | N | Y | N |
Evidence for direct regulation of genes in the JA, SA, ET, or ABA pathways was obtained from genome-wide analyses of binding sites for the TOC1, PRR5, and PRR7 proteins (Huang et al., 2012; Nakamichi et al., 2012; Liu et al., 2013).