Terminalia arjuna is native to India and occurs naturally along the banks of streams and rivers. The species is characterized to dry deciduous forests. The present study was carried out for the growth and physiological changes of T. arjuna in different elevated CO2 levels. Open top chambers were used to expose plants to ambient and elevated CO2 concentrations (400 and 800 ppm). The experiment was conducted in the month of March to August in 2019 for six months. The results showed that the growth parameters, i.e. plant height, collar diameter, the number of leaves, were found to be increased in elevated CO2 conditions. The percentage increase in physiological parameters like photosynthetic rate (28.82), mesophyll efficiency (60 % more in elevated CO2 condition), CO2 concentration (55 % more in elevated CO2), vapour pressure deficit (4.83 at 800 ppm) and water use efficiency (5.94 at ppm) increased. In contrast, transpiration rate (5.38 at 800 ppm and 10.11 ppm at ambient condition) and stomatal conductance (30% less in 800 ppm) decreased under elevated CO2 compared to ambient conditions. The study concluded that changing climatic conditions and significantly elevated CO2 in future may profoundly influence plant growth and the physiological response of T. arjuna.
Adaptations, Biomass, Carbon partitioning, Medicinal plants, Photosynthesis
Convention on Biological Diversity (2014). Introduction, Climate change and biodiversity. Convention on biological diversity (CBD), https://www.cbd. int/climate/intro.shtml. Accessed 3 Mar 2018
Chakrabarti, B., Singh, S.D., Kumar, S.N., Aggarwal, P.K., Pathak, H. & Nagarajan S. (2012). Elevated CO2 affects photosynthetic responses in canopy pine and subcanopydeciduous trees over 10 years: a synthesis from Duke FACE. Glob. Change Biol., 18 223–242. 10.1111/j.1365-2486.2011.02505]
Gao, J., Han, X., Seneweera, S., Li P., Zong, Y. Z. & Dong, Q. (2015). Leaf photosynthesis and yield components of mung bean under fully open-air elevated [CO2]. J. Integr. Agric. 14 977–983. 10.1016/S2095-3119(14)60941-2
Nowak, R.S., Ellsworth, D. S. & Smith, S. D. (2004) Functional responses of plants to elevate atmospheric CO2do photosynthetic and productivity data from FACE experiments support early predic- tions. New Phytol162:253–280
Kumari, M., Verma, S.C., Bhardwaj, S.K., Thakur, A.K., Gupta, R.K. & Sharma, R. (2016). Effect of elevated CO2 and temperature on growth parameters of pea (Pisum sativum L.) crop. Journal of Applied and Natural Science, 8: 1941-1946.
Saravanan, S., and Karthi S. (2014). Effect of elevated CO2 on growth and biochemical changes in Catharanthus roseus- a valuable medicinal herb. World Journal of Pharmacy and Pharmaceutical Sciences, 3: 411-422.
Lawson, T., Blatt. & M. R., (2014). Stomatal size, speed, and responsiveness impact on photosynthesis and wate use efficiency. Plant Physiol. 164 1556–1570.10.1104/pp.114.237107 [PMC free article] ]Medlyn B. E., Barton C. V. M., Broadmeadow M. S. J., Ceulemans R., De Angelis.Molecular detection and characterization of Horsegram Yellow Mosaic Virus (HgYMV) infecting Lima bean .
Li, X., Zhang, L., Ahammed, G. J., Li, Z.-X., Wei, J.-P. & Shen, C. (2017). Stimulation in primary and secondary metabolism by elevated carbon dioxide alters green tea quality in Camellia sinensis L. Scientific Reports 7, 7937. doi: 10.1038/s41598-017-08465-1
Ping, Li., Hongying, Li., Yuzheng Zong, Frank Yonghong, Li., Yuanhuai Han & Xingyu, Hao. (2017). Photosynthesis and metabolite responses of Isatisindigotica Fortune to elevated [CO2], The Crop Journal, 5 (4), 345-353
Sharma R., Singh, H., Kaushik M., Nautiyal, R. & Singh O, (2018). Adaptive physiolo.gical, carbon portioning and biomass production of Withania somnifera (L.) Dunal grown under elevated CO2 regimes. 3 Biotech, 8: 1-10.
Singh, H., Savita, A., Sharma, R., Sinha, S., Kumar, M., Kumar, P., Verma, A. & Sharma, S.K., (2017). Physiological functioning of Lagerstroemia speciosa L. under heavy roadside traffic: an approach to screen potential species for abatement of urban air pollution. 3 Biotech7:1–10.
Singh, H., Sharma, R., Savita, A., Singh, M.P., Kumar, M., Verma, A., Ansari, M. W. & Sharma, S. K. (2018). Adaptive physiological response of Parthenium hysterophorusto elevated atmospheric CO2 concentration. Indian Forster, 144:1–14.
Singh, H., Sharma, R., Verma, A., Kuma, M. & Kumar., S. (2016). Can atmospheric CO2enrichment alter growth dynamics, structure and functioning of medicinal and aromatic plant (Tulsi)? An approach to understand adaptation and mitigation potential of medicinal andaromatic plants in wake of climate change scenario. In: Annual session of the national academy of sciences India, Jointly organized by National Academy of Sciences India and Uttarakhand State Council for Science and Technology (UCOST), Dehradun,2–4 Dec 2016, pp 94.
Sreeharsha, R.V., Sekhar, K. M. Reddy, A. R. (2015). Delayed flowering is associated with lack of photosynthetic acclimation in Pigeon pea (Cajanus cajan L.) grown under elevated CO2. Plant Sci. 231, 82–93. doi: 10.1016/j..2014.11.012.
Taylor, S. H., Aspinwall, M. J., Blackman, C.J., Choat, B., Tissue, D.T. & Ghannoum, O. (2018).CO2availability influences hydraulic function of C3 and C4 grass leaves. Journal of Experimental Botany, 69 (10): 2731–2741.
Thinh N.C., Shimono H., Kumagai, E, & Kawasaki M. (2017). Effects of elevated CO2 concentration on growth and photosynthesis of Chinese yam under different temperature regimes. Plant Production Science, 20: 227-236.
Tilman, D. & Lehman, C. (2001) Human-caused environmental change: impacts on plant diversity and evolution. Proc. Natl. Acad. Sci .,USA 98:5433–5440.
Zari, M.P. (2014) Ecosystem services analysis in response to biodiversity loss caused by the built environment. Surv Perspect Integr Environ Soc., 7:1–14.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)