Salinity Stress in Tomato Plants
Takagi, M., El-Shemy, H.A., Sasaki, S., Toyama, S., Kanai, S., Saneoka, H. and Fujita, K. 2008. Elevated CO2 concentration alleviates salinity stress in tomato plant. Acta Agriculturae Scandinavica Section B - Soil and Plant Science: 10.1080/09064710801932425.
Results indicated that "salt-stress treatment severely decreased whole-plant biomass," as well as "leaf photosynthesis and transport of carbon assimilates," but that "the impact of stress on these activities was alleviated under elevated CO2 concentration." This alleviation, as they describe it, "was promoted when sink activity relative to source activity was higher," which they say was "probably owing to improvement of oxidative stress," due "at least partially to the higher constitutive antioxidant enzymes' activities," as well as improved water status "through stomatal closure at high CO2 concentration."
In considering their findings, the seven scientists state that their study "corroborates earlier reports that the interaction between salinity stress and CO2 concentration result[s] in the alleviative effect of elevated CO2 on the negative effects of salinity on plant growth," providing yet another indication of the ability of earth's plants to function ever more robustly and to successfully overcome various environmental challenges as the air's CO2 content continues to climb ever higher.