EFFECT OF HIGH TEMPERATURE ON PHOTOSYNTHESIS, STOMATAL CONDUCTANCE, TRANSPIRATION AND YIELD OF BORO RICE VARIETIES UNDER DIFFERENT SOIL MOISTURE REGIMES
Climate is changing and air temperature is rising due to increasing concentration of CO2 and other atmospheric greenhouse gases. The flowering stage of rice is important for high temperatures. An experiment was carried out at Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh during December 2020 to May 2021 with three Boro rice varieties to find out proper soil moisture level at flowering stage to reduce high temperature effect. Binadhan-8, Binadhan-10 and Binadhan-14 were grown in pots each of 8 kg soil in ambient temperature. During flowering stage the plants were kept in plant growth chamber at 38 0C for 24 hrs under different soil moisture levels (standing water of 2 inches, 100% FC and 80% FC) in pot soil. Then all the plants were allowed to complete the maturity under sufficient soil moisture at ambient temperature. The experiment was conducted in RCBD with three replications. The results revealed that under high temperature photosynthesis, transpiration rate and yield significantly decreased but leaf temperature (oC) and water use efficiency increased at 80% FC. Transpiration maintained leaf temperature of 33.17-34.87°C during air temperature of 3°C. Binadhan-8 and Binadhan-10 maintained lower leaf temperature and Binadhan-14 had better water use efficiency at 80% FC. Higher yield was found in 100% FC and standing water of 2 inches compared to 80% FC. So, maintaining 100% FC or standing water of 2 inches at flowering stage of Boro rice varieties can reduce high temperature effect.
Cornic, G. 2021. https://www.encyclopedie-environnement.org/en/life/effects-temperature-on-photosynthesis/
Hafiz, M.A, Islam, M.T. and Karim, M.A. 2015. Grain growth and yield performance of aromatic rice genotypes under different soil moisture regimes. Int. J. Sustain. Crop Prod. 10(2), 44-47.
Hazra, P., Islam, M.T. and Das, G.C. 2016. Effect of high temperature on some physiological parameters of grain growth and yield of boro rice varieties. J. Biosci. Agric. Res., 7(1), 600–607.
Huang, G., Yang, Y., Zhu, L., Peng, S. and Li, Y. 2021. Temperature responses of photosynthesis and stomatal conductance in rice and wheat plants. https://doi.org/10.1016/j.agrformet.2021.108322
Islam, M.T. 2001. Screening of some transplanted aman rice cultivars under water stress condition. Bangladesh J. Train. Devt. 14(1&2), 213-220.
Islam, M.T. 2010. Photosynthesis, conductance, transpiration, water use efficiency and grain growth of high yielding rice varieties under water stress. Int. J. Expt. Agric. 1(2), 1-4.
Islam, M.T. 2011. Effect of temperature on photosynthesis, yield attributes and yield of aromatic rice genotypes. Int. J. Sustain Crop Prod., 6(1), 14-16.
Islam, M.T. 2013. Photosynthesis, chlorophyll stability and grain growth of aromatic rice genotypes under high temperature. Bangladesh J. Nuclear Agric., 27-28:9-14.
Islam, M.T. 2021a. Water stress tolerance in hybrid rice. Intl. J. Sustain. Crop Prod., 16 (2), 1-3.
Islam, M.T. 2021b. High soil moisture at flowering stage of boro rice varieties reduces high temperature effect. Int. J. Expt. Agric. 11(2): 11-14.
Islam, M. T. and Gretzmacher, R. 2001. Grain growth pattern and yield performance of some transplanted aman rice cultivars in relation to moisture stress. Bangladesh J. Nuclear Agric. 16&17: 21-28.
Islam, M.T., Hossain, M.A. and Islam, M.T. 2005a. Effect of soil moisture on morpho-physiological and yield attributes of boro rice genotypes. J. Bangladesh Soc. Agric. Sci. Technol., 2 (3 & 4), 81-84.
Islam, M.T., Islam, M.N., Hossain, M.A. and Karim, M.A. 2012. Effects of water stress on morpho-physiological characters and yield of rice genotypes. Int. J. Sustain. Crop Prod., 7(1): 6-11.
Islam, M.T., Islam, M.T. and Salam, M.A. 1994b. Growth and yield performance of some rice genotypes under different soil moisture regimes. Bangladesh J. Train. Devt., 7(2), 57-62.
Islam, M.T., Khan, M.E.H. and Islam, M.T. 2005b. Grain growth pattern and yield attributes of boro rice genotypes under soil moisture stress. J. Bangladesh Soc. Agric. Sci. Technol., 2 (3 & 4), 25-28.
Islam, M.T., Salam, M.A. and Kauser, M. 1994a. Effect of water stress at different growth stages of rice on yield components and yield. Progress. Agric., 5(2), 151-156.
Islam, Z., Islam, M.T. and Islam, M.O. 2005c. Effect of soil moisture on dry matter production and yield of boro rice under pot culture conditions. Bangladesh J. Crop Sci., 16(1), 37-43.
Jeng, T.L., Tseng, T.H., Wang, C.S., Chen, C.L., Sung, J.M. 2006. Yield and grain uniformity in contrasting rice genotypes suitable for different growth environments. Field Crops Res., 99: 59-66.
Karim, M.R., Ishikawa, M. Ikeda, M., Islam, M.T. 2012. Climate change model predicts 33% rice yield decrease in 2100 in Bangladesh. Agron. Sustain. Dev., DOI 10.1007/s13593-012-0096-7
Kumar, S. 2020. Abiotic stresses and their effects on plant growth, yield and nutritional quality of agricultural produce. Int. J. Sci. Food Agric. 4(4): 367-378.
Moonmoon, S. and Islam, M.T. 2017. Effect of drought stress at different growth stages on yield and yield components of six rice (Oryza sativa L.) genotypes. Fundam Appl Agric., 2(3), 285-289.
Moonmoon, S., Fakir, M.S.A. and Islam, M.T. 2020a. Assimilation of grain on yield and yield attributes of rice (Oryza sativa L.) genotypes under drought stress. Fourrages. 241(3), 85-98.
Moonmoon, S., Fakir, M.S.A. and Islam, M.T. 2020c. Modulation of morpho-physiology in rice at early tillering stage under drought stress. Role of photosynthates. Fourrages. 242(4), 19-37.
Moonmoon, S., Fakir, M.S.A., Islam, M.T. 2020b. Effect of drought on morphology and dry matter partitioning at panicle stage in rice genotypes. Fourrages. 242(6), 19-30.
Moonmoon, S., Fakir, M.S.A., Islam, M.T. 2017. Effect of drought stress on grain dry weight, photosynthesis and chlorophyll in six rice genotypes. Sch J Agric Vet Sci., 4(1), 13-17.
Rahman, M.T., Islam, M.T. and Islam, M.O. 2002. Effect of water stress at different growth stages on yield and yield contributing characters of transplanted aman rice. Pakistan J. Biol. Sci., 5(2), 169-172.
Rawson, H.M. 1992. Plant responses to temperature under conditions of elevated CO2. Aust J. Bot. 40: 473-490.
Singh, S., Singh, T.N., Chauhan, J.S. 2010. Productivity of hybrid rice. 1. Vernubility to water stress of reproductive development and inhibition of RuBisCO enzyme in upper leaves as major constraints to yield. J. New Seeds. 11(4), 328-355.
Yamori, W., Hikosaka, K. and Way, D.A. 2014. Temperature response of photosynthesis in C3, C4, and CAM plants: temperature acclimation and temperature adaptation. Photosynthesis Res. 119, 101-117.
Yang, D., Peng, S. and Wang, F. 2020. Response of photosynthesis to high growth temperature was not related to leaf anatomy plasticity in rice (Oryza sativa L.). Front. Plant Sci. doi: 10.3389/fpls.2020.00026
Zohora, F.T., Islam, M.T. and Baten, M.A. 2016. Drought tolerance of NERICA rice mutants. Int. J. Sustain. Crop Prod., 11(11), 4-8.