Abstract:
Terminalia arjtma, Terminalia bellirica and Terminalia chebula are important
medicinal plants and part of Triphala, there is less study about the adaptation and
mitigation of these species to elevated CO2. This study is helpful to understand
about the adaptive and miligative and biochemical efficiency of these plants. Under
elevated these three species are showed a belter response in elevated CO2 SOOppm
over ambient 400ppm. The plant height, leaf length and width, stem diameter,
number leaves and branches, root length, are higher in elevated SOOppm CO2 over
ambient 400ppm as well as the biochemical properties like total chlorophyll and
carotenoids, ascorbic acid, protein, proline, total sugar are increased dramatically
at SOOppm over 400ppm. The photos>Tithetic rate was higher in elevated CO:in all
seasons (winter, spring, and summer), stomatal conductance was higher in SOOppm
spring and lower at summer. The intercellular CO2 concentration was higher in
plants grown in SOOppm T.chebula in winter in the summer season. Transpiration
rate was higher in winter and reduced over ambient in summer. Night respiration is
less in T.arjuna compared to ambient, and there is a fluctuation concerning
seasonality and species. Carbon sequestration, carbon partitioning, carbon
mitigation and carbon stocks are high in elevated CO2 growing plants except for
T.bellirica. Organic carbon was higher in elevated CO2 than ambient. Potassium,
phosphorous and total nitrogen they with species and change in concentration
according to elevated CO2.
The plants grown in elevated CO2 are healthier than ambient condition and
increases the health-promoting characters. These species are more adaptive and
show mitigation efficiency and good biochemical efficiency. In future more studies
needed to know about the response of plants towards elevated CO2.
