A study conducted in open top chambers with potato cv. Kufri
chandramukhi under ambient and elevated concentrations of CO2
and O3 suggested protection due to elevated CO2 against O3 on
different growth and yield parameters and foliar injury (Kumari
and Agrawal, 2014). The present study was conducted to
understand the physiological and biochemical bases of the
variable responses of potato (Solanum tuberosum L. cv. Kufri
chandramukhi) to different combinations of ambient and elevated
CO2 and O3 through a season long exposure using open top
chambers. The objectives of the present study were (i) to
understand the effects of ambient and elevated CO2 and/or
ambient and elevated O3 on photosynthetic pigments, antiox-
idative enzymes, O3 flux and photosynthetic performance of
potato (ii) to specify whether the elevated atmospheric CO2
alleviates the damaging effects of O3 mainly due to lower O3 flux
by reducing stomatal conductance or by increasing the antiox-
idative capacity of the plant. The following hypotheses were
proposed for the present study: