Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought

Compatible solutes rescue plants in the hour of intense water deficit conditions. Glycinebetaine (GB) and potassium (K) are main solutes, playing role in improving plant water potential and ultimately the crop yield. However, only a few attempts have been made so far to study their optimum dozes and...

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Autores principales:	Raza,M.A.S, Saleem,M.F, Shah,G.M, Khan,I.H, Raza,A
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2014
Materias:	Foliar spray drought tolerance leaf water potential water deficit wheat yield
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000200008
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spelling	oai:scielo:S0718-951620140002000082014-07-30Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under droughtRaza,M.A.SSaleem,M.FShah,G.MKhan,I.HRaza,A Foliar spray drought tolerance leaf water potential water deficit wheat yield Compatible solutes rescue plants in the hour of intense water deficit conditions. Glycinebetaine (GB) and potassium (K) are main solutes, playing role in improving plant water potential and ultimately the crop yield. However, only a few attempts have been made so far to study their optimum dozes and interactions to ameliorate the drought stress in wheat. To explore this, GB solutions of 0, 50,100 and 150 mM concentration and K solutions of 0, 0.5, 1.0, and 1.5% concentration were sprayed at milking stage of two wheat varieties under stress (Auqab-2000; drought sensitive and Lasani-2008; drought resistant). The stress was created by withholding water up till appearance of wilting symptoms and then the solutes (alone and/or in combination) were sprayed with carboxymethyl cellulose as a sticking agent, whereas Tween-20 was used as a surfactant for foliar spray. At maturity, ten random plants from field-experiments and three in case of pot experiment were selected to estimate plant height, spike length, number of spikelets spike-1, number of grains spike-1, and grain yields. Besides, water potential, osmotic potential and turgor potential of crop were also estimated. The results indicated that the drought stress adversely affected all the above parameters. The exogenous application of GB and K to wheat significantly improved spike length, number of grain per spike and grain yields. Moreover, a significant interaction between these solutes was observed since at a given level of GB all these yield parameters were increased (p < 0.05) with K concentration. The highest values were obtained when GB and K were applied in combination at 100 mM and 1.5%, respectively. The same treatment also improved the leaf water potential, osmotic potential and turgor potential to maintain plant water potential gradient under stress. These findings lead us to conclude that application of GB and K (100 mM and 1.5%, respectively) is the best strategy to ameliorate the drought impact on wheat at milking stage with improved production.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.14 n.2 20142014-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000200008en10.4067/S0718-95162014005000028
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Foliar spray drought tolerance leaf water potential water deficit wheat yield
spellingShingle	Foliar spray drought tolerance leaf water potential water deficit wheat yield Raza,M.A.S Saleem,M.F Shah,G.M Khan,I.H Raza,A Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought
description	Compatible solutes rescue plants in the hour of intense water deficit conditions. Glycinebetaine (GB) and potassium (K) are main solutes, playing role in improving plant water potential and ultimately the crop yield. However, only a few attempts have been made so far to study their optimum dozes and interactions to ameliorate the drought stress in wheat. To explore this, GB solutions of 0, 50,100 and 150 mM concentration and K solutions of 0, 0.5, 1.0, and 1.5% concentration were sprayed at milking stage of two wheat varieties under stress (Auqab-2000; drought sensitive and Lasani-2008; drought resistant). The stress was created by withholding water up till appearance of wilting symptoms and then the solutes (alone and/or in combination) were sprayed with carboxymethyl cellulose as a sticking agent, whereas Tween-20 was used as a surfactant for foliar spray. At maturity, ten random plants from field-experiments and three in case of pot experiment were selected to estimate plant height, spike length, number of spikelets spike-1, number of grains spike-1, and grain yields. Besides, water potential, osmotic potential and turgor potential of crop were also estimated. The results indicated that the drought stress adversely affected all the above parameters. The exogenous application of GB and K to wheat significantly improved spike length, number of grain per spike and grain yields. Moreover, a significant interaction between these solutes was observed since at a given level of GB all these yield parameters were increased (p < 0.05) with K concentration. The highest values were obtained when GB and K were applied in combination at 100 mM and 1.5%, respectively. The same treatment also improved the leaf water potential, osmotic potential and turgor potential to maintain plant water potential gradient under stress. These findings lead us to conclude that application of GB and K (100 mM and 1.5%, respectively) is the best strategy to ameliorate the drought impact on wheat at milking stage with improved production.
author	Raza,M.A.S Saleem,M.F Shah,G.M Khan,I.H Raza,A
author_facet	Raza,M.A.S Saleem,M.F Shah,G.M Khan,I.H Raza,A
author_sort	Raza,M.A.S
title	Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought
title_short	Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought
title_full	Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought
title_fullStr	Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought
title_full_unstemmed	Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought
title_sort	exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000200008
work_keys_str_mv	AT razamas exogenousapplicationofglycinebetaineandpotassiumforimprovingwaterrelationsandgrainyieldofwheatunderdrought AT saleemmf exogenousapplicationofglycinebetaineandpotassiumforimprovingwaterrelationsandgrainyieldofwheatunderdrought AT shahgm exogenousapplicationofglycinebetaineandpotassiumforimprovingwaterrelationsandgrainyieldofwheatunderdrought AT khanih exogenousapplicationofglycinebetaineandpotassiumforimprovingwaterrelationsandgrainyieldofwheatunderdrought AT razaa exogenousapplicationofglycinebetaineandpotassiumforimprovingwaterrelationsandgrainyieldofwheatunderdrought
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Exogenous application of glycinebetaine and potassium for improving water relations and grain yield of wheat under drought

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