EFFECT OF DROUGHT STRESS ON PHOTOSYNTHESIS, STOMATAL CONDUCTANCE, TRANSPIRATION AND YIELD OF MUNGBEAN GENOTYPES UNDER HIGH TEMPERATURE
Climate is changing and air temperature is rising due to increasing concentration of CO2 and other atmospheric greenhouse gases. Drought is one of the most prevalent forms of abiotic environmental stress that reduce crop productivity. An experiment was conducted with six mungbean (Vigna radiata L. Wilczek) mutants viz., MI-12, MM-1, MM-11, MM-2, MM-5, MM-8 along with Binamoog-8 at Bangladesh Institute of Nuclear Agriculture during March-May, 2021 to assess the effect of drought at flowering stage of the mungbean genotypes under high temperature. Plants were grown in ambient temperature and during flowering stage those were kept in plant growth chamber at 38 0C for 24 hrs under different soil moisture levels (80, 60 and 40% FC) in pot soil. After high temperature treatment, the plants were allowed to complete the maturity under sufficient soil moisture (80% FC) at ambient temperature. The experiment was laid out in a randomized complete block design with three replications. Data on photosynthesis, Fv/Fm (maximum quantum efficiency of PSII photochemistry), stomatal conductance, transpiration were recorded during stress imposition and yield and yield attributes were recorded at maturity. Under the temperature treatment photosynthesis, Fv/Fm, stomatal conductance, transpiration rate, water use efficiency and yield decreased significantly with the decrease of soil moisture levels. Photosynthesis, Fv/Fm, stomatal conductance, transpiration rate water use efficiency and yield decreased 10.10, 2.35, 7.40, 3.24, 7.16 and 34.87, respectively at 60% FC and 14.35, 7.05, 18.51, 10.81, 15.30 and 62.73%, respectively, at 40% FC compared to control. The mutants MM-5 and MM-8 showed better performance under drought and high temperature.
Bangar, P., Chaudhury, A., Umdale, S., Kumari, R., Tiwari, B., Kumar, S., Gaikwad, A.B., Bhat, K.V. 2018. Detection and characterization of polymorphic simple sequence repeats markers for the analysis of genetic diversity in Indian mungbean [Vigna radiata (L.) Wilczek]. Indian J. Genet Pl. Br. 78: 111-117.
Basu, S., Ramegowda, V., Kumar, A., Pereira, A. 2016. Plant adaptation to drought stress. F1000Research: 5. F1000 Faculty Rev-1554. doi:10.12688/f1000research.7678.1.
BBS, 2021. Year Book of Agricultural Statistics of Bangladesh. Bangladesh Bureu of Statistics. Ministry of Planning. Government of the People’s Republic of Bangladesh. p. 141.
Fahad, S., Bajwa, A.A., Nazir, U., Anjum, S.A., Farooq, A., Zohaib, A., Sadia, S., Nasim, W., Adkins, S., Saud, S., Ihsan, M.Z. 2017. Crop production under drought and heat stress: plant responses and management options. Front. Plant Sci. 8: 1147.
Guo X, Li, T, Tang, K, Liu, R.H. 2012. Effect of germination on phytochemical profiles and antioxidant activity of mung bean sprouts (Vigna radiata). J. Agric. Food Chem. 60: 11050-11055.
Hamid, M.A., Agata, W., Kawamitsu, Y. 1990. Photosynthesis, transpiration and water use efficiency in four cultivars of mungbean. Photosynthetica 24: 96-101.
Islam, M.T. 2015. Effect of high temperature on photosynthesis and yield in mungbean. Bangladesh J. Bot. 44(3): 451-454.
Islam, M.T. 2018. Photosynthesis, dry matter partitioning and yield of mungbean under high temperature. Bangladesh J. Nuclear Agric. 31& 32: 15-20.
Islam, M.T., Adnan, M.Z., Karim, M.A. 2005. Effect of soil moisture on growth and yield of summar mungbean. Bangladesh J. Crop Sci. 16 (2): 165-169.
Islam, M.T., Banu, S.A., Tuab, A.S.M. 2006. Effect of water stress on morpho-physiological attributes and yield of mungbean. J. Bangladesh Soc. Agric. Sci. Technol. 3 (3 & 4): 6l-64.
Islam, M.T., Razzaque, A.H.M. 2007. Growth, yield and biochemical assessment of pulse crops under water and salinity stresses- a review. J. Bangladesh Soc. Agric. Sci. Technol., 4(3 & 4): l-4.
Islam, M.T., Razzaque, A.H.M. 2010. Relationships of photosynthetic related parameters and yield of summer mungbean varieties/mutants. Int. J. Sustain. Crop Prod. 4: 11-15.
Khattak, G.S.S., Saeed I. and Muhammad T. 2006. Breeding for heat tolerance in mungbean (Vigna radiata L.Wilczek). Pak J. Bot. 38: 1539-1550.
Kumar, S., Ayachital, G., Sahoo, L. 2020. Screening of mungbean for drought tolerance and transcriptome profiling between drought-tolerant and susceptible genotype in response to drought stress. Plant Physiol. Biochem. 157: 229-238.
Kumari, P. and Verma, S.K. 1983. Genotypic differences in flower production/shedding and yield in mungbean (Vigna radiata). Ind. J. Pl. Physiol. 26: 402-405.
Naik, M.G., Panoth, A., Venkatachalapathy, N. 2020. Mungbean. In book: Pulses: Processing and Product Development. Publisher: Springer Nature, Switzerland. DOI: 10.1007/978-3-030-41376-7_12
Pastenes, C. and Horton, P. 1996. Effect of high temperature on photosynthesis in beans (L Oxygen evolution and chlorophyll fluorescence). Plant Physiol. 112: 1245-1251.
Poehlman, J.M. 1991. The Mungbean, Oxford and IBH Publishing Co. Pvt. Ltd. pp. 27-30. New Delhi.
Pooja, B., Ashok, C., Bhavana, T., Sanjay, K., Ratna, K., Venkataramana, B.K. 2019. Morphophysiological and biochemical response of mungbean [Vigna radiate (L.) Wilczek] varieties at different developmental stages under drought stress. Turk J. Biol. 43 (1): 58-69.
Singh, D.P. and Sing, B.B. 2011. Breeding for tolerance to abiotic stresses in mungbean. J. Food Legumes. 24:83-90.
Sunayana, Punia, M.S. and Yadev, R. 2016. Evaluation of mungbean (Vigna radiate L. Wilczek) genotypes for high temperature and drought tolerance. The Ecoscan. Special Issue. 4: 875-880.
Yuliasti and Reflinur 2015. Evaluation of mungbean mutant lines to drought stress and their genetic relationships using SSR markers. Atom Indonesia. 41(3): 161-167.