Potato Response to Water Stress
Fleisher, D.H., Timlin, D.J. and Reddy, V.R. 2008. Interactive effects of carbon dioxide and water stress on potato canopy growth and development. Agronomy Journal 100: 711-719.
With respect to their findings, the authors report that "proportionately more dry mass was partitioned to belowground organs for elevated CO2 as irrigation decreased," so that "tuber yields were larger for elevated CO2 plants at the lower irrigation amounts."
Noting that "CO2 enrichment helped mediate negative effects of drought stress on potato productivity," the three researchers concluded their results indicated that "CO2 interaction with water stress will compensate, to some extent, for anticipated decreased water supply available for potato production under future climate change scenarios," and that "water stress predicted by climate change models will be mediated somewhat under CO2 enrichment."