Abstract
Physiological responses of pearl millet and sorghum to water stress were compared for better understanding of crop adaptation in drylands. Pearl millet (MBH-110) and sorghum (CSH-6) were raised in pots and were subjected to short term water stress at anthesis stage. Water stress decreased leaf water potential, rates of stomatal conductance, photosynthesis and transpirations and transpiration efficiency in flag leaves relatively more in sorghum than in pearl millet. Stomatal conductance and transpiration rates recovered quicker in pearl millet than in sorghum in 24 h after rewatering. Dry season accentuated the water stress effects. Transpiration efficiency of pearl millet was more responsive to increase in atmospheric moisture. The physiological responses explain the better adaptation of pearl millet to drier regions than of sorghum.
Similar content being viewed by others
References
Baldocchi D D, Verma S B and Rosenberg N J 1985 Water use efficiency in a soybean field: Influence of plant water stress;Agric. For. Meteorol. 34 53–65
Boyer J S 1970 Differing sensitivity of photosynthesis to low leaf water potentials in corn and soybean;Plant Physiol. 46 236–239
Fischer R A 1981 Optimising the use of water and nitrogen through breeding of crops;Plant Soil. 58 249–278
Frere M 1984 Ecological zones and production of sorghum and millet;Proceedings of the International Symposium on Agrometeorology of sorghum and millet in the semi-arid tropics, ICRISAT, Patancheru, pp 33–39
Henson I E, Mahalakshmi V, Alagarswamy G and Bidinger F R 1984 Leaf abscisic acid content and recovery from water stress in pearl millet (Pennisetum americanum (L.) Leeke);J. Exp. Bot. 35 99–109
Jones M M and Rawson H M 1979 Influence of rate of development of leaf water deficits upon photosynthesis, leaf conductance, water use efficiency, and osmotic potential in sorghum;Physiol. Plant. 45 103–111
Kanemasu E T, Singh P and Chaudhuri U N 1984 Water use and water use efficiency of pearl millet and sorghum;Proceedings of the International Symposium on Agrometeorology of sorghum and pearl millet in the semi arid tropics, ICRISAT, Patancheru, pp 175–181
Lewis R B, Hiler E A and Jordan W R 1974 Susceptibility of grain sorghum to water deficit at three growth stages;Agron. J. 66 589–591
Mahalakshmi V, Bidinger F R and Raju D A 1987 Effect of timing of water deficit on pearl millet (Pennisetum americanum);Field Crops Res.115 327–339
Monteith J L 1986 Significance of the coupling between saturation vapour pressure deficit and rainfall in monsoon climate;Exp. Agric. 22 329–338
Seetharama N, Mahalakshmi V, Bidinger F R and Singh S 1984 Response of sorghum and pearl millet to drought stress in semi-arid India;Proceedings of the International Symposium on Agrometeorology of sorghum and millets in the semi-arid tropics, ICRISAT, Patancheru, pp 159–173
Sinclair T R, Bingham G E, Lemon E R and Allen L H Jr 1975 Water use efficiency of field grown maize during moisture stress;Plant Physiol. 56 245–249
Turner N C 1986 Crop water deficits: A decade of progress;Adv. Agron. 39 1–51
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Subramanian, V.B., Maheswari, M. Comparison of physiological responses of pearl millet and sorghum to water stress. Proc. Indian Acad. Sci. 99, 517–522 (1989). https://doi.org/10.1007/BF03053420
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF03053420