differential drought stress response in the sister species Arabidopsis halleri and Arabidopsis lyrata. Arabidopsis lyrata; Arabidopsis halleri

The goal of this study is to assess the response to water deprivation among closely related plant species with different ecologies. We showed that Arabidopsis halleri down-regulates growth-related genes as soon as soil water content decreases. Such signs are absent in A. lyrata, which, instead, up-regulates water-deprivation genes after recovery, indicating that it adjusts its physiology after stress exposure.