Quantitative real time (RT)-PCR
The RNA extraction as well as qRT-PCR was performed as described previously (Jozefowicz et al., 2017) The reference sequences for potato were L2 and Aprt (primers as suggested by Nicot, Hausman, Hoffmann, and Evers (2005), while the primers targeting aquaporin genes were taken fromVenkatesh, Yu, and Park (2013). The primers for the A. thaliana aquaporin genes were those described by Alexandersson et al. (2010) and the reference genes were tip41 and expr(Czechowski, Stitt, Altmann, Udvardi, & Scheible, 2005).