“…Some published data suggest the potential for competition 9 climate interaction effects on performance (Baron et al, 2015;Campitelli et al, 2016), though the physiological basis of these interactions is largely unknown. Third, previous research has yielded insight into genetic and physiological mechanisms of drought adaptation, providing a basis for specific hypotheses about how moisture and competitive gradients interact to select for different traits (McKay et al, 2003;Juenger et al, 2010;Des Marais et al, 2012;Lovell et al, 2013;Kenney et al, 2014;Lasky et al, 2014Lasky et al, , 2018El-Soda et al, 2015;Bac-Molenaar et al, 2016;Dittberner et al, 2018;Exposito-Alonso et al, 2018DeLeo et al, 2020).…”