The response of photosynthesis to water deficit in atrazine-susceptible and resistant biotypes of Solanum nigrum

Abstract

CO2 assimilation under photorespiratory and non-photorespiratory conditions and stomatal conductance responses to water deficit were examined in intact attached leaves of atrazine-susceptible (AS) and resistant (AR) biotypes of Solanum nigrum. We found that the AR biotype of S. nigrum plant acclimated better to water deficit than the AS one, as revealed by the measurements of stomatal conductance, CO2 assimilation and photorespiration rate.