Liu, L., Jiang, Y., Zhang, X., Wang, X., Wang, Y., Han, Y., et al. (2017). Two SUMO Proteases SUMO PROTEASE RELATED TO FERTILITY1 and 2 Are Required for Fertility in Arabidopsis. Plant Physiology, 175(4), 1703-1719. doi:10.1104/pp.17.00021.