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

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.