Physio morphological plasticity of rice (Oryza sativa L.) genotypes exposed to water-stress

CH L. N. Manikanta, R. Beena, Roy Stephen, R.V. Manju, M.M. Viji, Swapna Alex


Water stress conditions alter the normal plant equilibrium and lead to a series of morphological, physiological and biochemical as well as molecular changes in plants affecting growth and productivity. An experiment was conducted at the Department of Plant Physiology, College of Agriculture, Kerala Agricultural University during 2018-19 with to evaluate the physio-morphological plasticity of rice genotypes under water stress. Plants of six rice genotypes, Nagina 22, Karutha Modan (Ptb 29), Chuvanna Modan (Ptb 30), Annapoorna (Ptb 35), Jyothi (Ptb 39) and Swetha (Ptb 57) were maintained at 100 % and 50 % FC soil moisture in a rainout shelter. Physio morphological observations were recorded at the booting stage and Nagina 22, Karuthamodan and Chuvannamodan, being tolerant genotypes, exhibited better plasticity in terms of physiological and root traits towards water stress whereas, Annapoorna, Jyothi and Swetha failed to respond. In the tolerant genotypes, there was no significant reduction in Relative Water Content (RWC), Cell Membrane Stability (CMS), and Specific Leaf Area (SLA) whereas, there was a significant increase in the growth of root parameters. Biomass partitioning data revealed allocation of dry matter towards root under stress compared to control condition.


Climate change, water stress, drought tolerance, Physiological and morphological traits.

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Abe, J. and Morita, S. 1994. Growth direction of nodal roots in rice: its variation and contribution to root system formation. Plant and Soil, 165, 333-337.

Azhiri-Sigari, T., Yamauchi, A., Kamoshita, A. and Wade, L. J. 2000. Genotypic variation in response of rainfed lowland rice to drought and rewatering. II. Root growth. Plant Prod. Sci. 3: 180-188.

Blum, A. and Ebercon, A. 1981. Cell membrane stability as a measure of drought and heatolerance in wheat. Crop Sci. 21(1): 43-47.

Chaudhary, P., Godara, S., Cheeran, A.N. and Chaudhari, A.K., 2012. Fast and accurate method for leaf area measurement. International journal of computer applications, 49(9), pp.22-25.

Chauhan, B. S. and Abugho, S. B. 2013. Effect of water stress on the growth and development of Amaranthusspinosus, Leptochloachinensis, and rice. American Journal of Plant Sciences, 4, 989.

Foley, J. A., Ramankutty, N., Brauman, K. A., Cassidy, E. S., Gerber, J. S., Johnston, M., Mueller, N. D., O’Connell, C., Ray, D. K. and West, P. C. 2011. Solutions for a cultivated planet. Nature, 478, 337.

Fontenelli, J.V., da Silva, T.J.E.A.U., Bonfim-Silva, E.M. and de Freitas Sousa, H.H.E., 2016. Soil moisture maintenance methods in cultivation in a greenhouse. African Journal of Agricultural Research, 11(5), pp.317-323.

Gautam, R.C. and Bana, R.S., 2014. Drought in India: its impact and mitigation strategies-a review. Indian Journal of Agronomy, 59(2), pp.179-190.

Ingram, K., Bueno, F., Namuco, O., Yambao, E. and Beyrouty, C. 1994. Rice root traits for drought resistance and their genetic variation.

Jaleel, C.A., Manivannan, P., Lakshmanan, G.M.A., Gomathinayagam, M. and Panneerselvam, R., 2008. Alterations in morphological parameters and photosynthetic pigment responses of Catharanthusroseus under soil water deficits. Colloids and Surfaces B: Biointerfaces, 61(2), pp.298-303.

Kadam, N. N., Yin, X., Bindraban, P. S., Struik, P. C. and Jagadish, K. S. 2015. Does morphological and anatomical plasticity during the vegetative stage make wheat more tolerant of water deficit stress than rice? Plant physiology, 167, 1389-1401.

Kavitha, K. 2014. Evaluation of Rice Genotypes for Growth, Drought Tolerance and Yield Under Aerobic Method of Cultivation. ACHARYA NG RANGA AGRICULTURAL UNIVERSITY.

Kumar, K.N., Rajeevan, M., Pai, D.S., Srivastava, A.K. and Preethi, B., 2013. On the observed variability of monsoon droughts over India. Weather and Climate Extremes, 1, pp.42-50.

Lonbani, M. and Arzani, A., 2011. Morpho-physiological traits associated with terminal drought-stress tolerance in triticale and wheat. Agronomy Research, 9(1-2), pp.315-329.

Premachandra, G. S., Saneoka, H., & Ogata, S. (1990). Cell membrane stability, an indicator of drought tolerance, as affected by applied nitrogen in soyabean. The Journal of Agricultural Science, 115(01), 63.

Renukha, D. K., Sudhakar, P. and Sivasankar, A. 2013. Screening of paddy genotypes for high water use efficiency and yield components. BIOINFOLET-A Quarterly Journal of Life Sciences, 10, 214-224.

Sadasivam, S., 1996. Biochemical methods. New age international.

Salehi-lisar, S.Y., Motafakkerazad, R., Hossain, M.M. and Rahman, I.M.M., 2012. Water stress in plants: causes, effects and responses. InTech, Croatia.

Sharp, R. and Davies, W. 1985. Root growth and water uptake by maize plants in drying soil. Journal of Experimental Botany, 36, 1441-1456.

Singh, A., Shamim, M. and Singh, K. 2013. Genotypic variation in root anatomy, starch accumulation, and protein induction in upland rice (Oryza sativa) varieties under water stress. Agricultural Research, 2, 24-30.

Thomas JF. Leaf anatomy of four species grown under continuous CO2 enrichment. Bot. Gaz. 1983; 144:303- 309.

Turner, N. C., Wright, G. C. and Siddique, K. 2001. Adaptation of grain legumes (pulses) to water-limited environments.

Turner, N.C., 1981. Techniques and experimental approaches for the measurement of plant water status. Plant and soil, 58(1-3), pp.339-366.

Wright, G., Rao, R. and Farquhar, G. 1994. Water-use efficiency and carbon isotope discrimination in peanut under water deficit conditions. Crop Science, 34, 92-97.

Wright, M. 2019. Most water-stressed countries in the world for 2019.Stats Gate.

Zu, X., Lu, Y., Wang, Q., Chu, P., Miao, W., Wang, H. and La, H., 2017. A new method for evaluating the drought tolerance of upland rice cultivars. The Crop Journal, 5(6), pp.488-498.


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