Rapid a-Ci Response (RACiR) of Two Gossypium Species Under Drought Conditions

Previous research indicated that drought effects are typically stomatal for upland cotton; however, some researchers have found contrasting responses. In an effort to gain a better understanding, Rapid A-Ci Response (RACiR) was used to evaluate the effect of mild to moderate drought on leaf metabolism in two Gossypium species.  Additionally, survey gas-exchange/fluorescence readings were taken immediately prior to RACiR experiments, providing a more complete snapshot of leaf metabolic response to drought. Here we present data from 60 RACiR curves from plants with midday leaf water potentials ranging from -1 to -2.5 MPa.