Table 2. Genes that have experimentally verified functions associated with stress responses in Arabidopsis and that show increased copy number in S. parvula and E. salsugineum.
The selected duplication events were not detected in other Brassicaceae lineage I and II genomes in a multispecies comparison including Arabidopsis, Arabidopsis lyrata, Capsella rubella, and Sisymbrium irio genomes (selected subset from Oh and Dassanayake, 2018).
| Arabidopsis Locus | Gene Name | Copy Number (At, Es, Sp) | Experimentally Verified Functions | References |
|---|---|---|---|---|
| AT2G26430 | ARGININE-RICH CYCLIN1 (RCY1) | 1, 3, 2 | Confers tolerance to LiCl and NaCl | Forment et al. (2002) |
| AT4G30380 | BARWIN-RELATED ENDOGLUCANASE | 1, 2, 2 | Induced during hypoxia | Yang et al. (2011) |
| AT1G10570 | OVERLY TOLERANT TO SALT2 (OTS2) | 1, 2, 2 | ots1ots2 double mutants show extreme sensitivity to salt | Conti et al. (2008) |
| AT4G26080 | ABA INSENSITIVE1 (ABI1) | 1, 2, 2 | Reduced sensitivity to salt and osmotic stress during germination | Krzywińska et al. (2016) |
| AT5G11260 | ELONGATED HYPOCOTYL5 (HY5) | 1, 3, 3 | Role in cold acclimation | Catalá et al. (2011); An et al. (2017) |
| AT4G20370 | TWIN SISTER OF FT (TSF) | 2, 4, 5 | Role in drought-escape response | Riboni et al. (2013) |
| AT1G47510 | INOSITOL POLYPHOSPHATE 5-PHOSPHATASE11 (5PTASE11) | 1, 2, 2 | Role in salt-induced ROS production | Kaye et al. (2011) |
| AT5G59820 | RESPONSIVE TO HIGH LIGHT41 (RHL41) | 3, 4, 4 | Role in reactive oxygen and abiotic stress signaling | Rizhsky et al. (2004); Davletova et al. (2005) |