A pqr2 mutant encodes a defective polyamine transporter and is negatively affected by ABA for paraquat resistance in Arabidopsis thaliana.
Dong S, Hu H, Wang Y, Xu Z, Zha Y, Cai X, Peng L, Feng S. J Plant Res. 2016 Sep; 129(5):899-907. Epub 2016 May 26.