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Improving Drought Tolerance by Exogenous Application of Glycinebetaine and Salicylic Acid in Sunflower

Water shortage is a severe threat to the sustainability of crop production. Exogenous application of glycinebetaine (GB) and salicylic acid (SA) has been found very effective in reducing the adverse affects of drought stress. This study was conducted to examine the possible role of exogenous GB and...

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Published in:Journal of agronomy and crop science (1986) 2008-06, Vol.194 (3), p.193-199
Main Authors: Hussain, M, Malik, M.A, Farooq, M, Ashraf, M.Y, Cheema, M.A
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cited_by cdi_FETCH-LOGICAL-c5565-7d5eab196c3c13f46efa5fa75ac7a2219efc6d535d50f18511afb72c63106dbc3
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container_title Journal of agronomy and crop science (1986)
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creator Hussain, M
Malik, M.A
Farooq, M
Ashraf, M.Y
Cheema, M.A
description Water shortage is a severe threat to the sustainability of crop production. Exogenous application of glycinebetaine (GB) and salicylic acid (SA) has been found very effective in reducing the adverse affects of drought stress. This study was conducted to examine the possible role of exogenous GB and SA application in improving the yield of hybrid sunflower (Helianthus annuus L.) under different irrigation regimes. There were three levels of irrigation, viz. control (normal irrigations), water stress at vegetative stage (irrigation missing at vegetative stage) and water stress at flowering stage (irrigation missing at flowering stage). GB and SA were applied exogenously at 100 and 0.724 m m, respectively, each at the vegetative and at the flowering stage. Control plants did not receive application of GB and SA. Water stress reduced the head diameter, number of achene, 1000-achene weight, achene yield and oil yield. Nevertheless, exogenous GB and SA application significantly improved these attributes under water stress. However, drought stress increased the free leaf proline and GB, and were further increased by exogenous application of GB and SA. However, exogenous GB application at the flowering stage was more effective than other treatments. Oil contents were also reduced under water stress; however, GB and SA application could not ameliorate the negative effect of water stress on achene oil contents. The effects of water stress and foliar application of GB were more pronounced when applied at the flowering stage than at the vegetative stage. Moreover, exogenous GB application was only beneficial under stress conditions.
doi_str_mv 10.1111/j.1439-037X.2008.00305.x
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Soil science and plant productions ; application rate ; betaine ; Biological and medical sciences ; crop yield ; developmental stages ; diameter ; drought ; drought tolerance ; exogenous application ; foliar application ; Fundamental and applied biological sciences. Psychology ; Genetics and breeding of economic plants ; glycinebetaine ; Helianthus ; Helianthus annuus ; inflorescences ; irrigation ; leaves ; plant cultural practices ; plant development ; proline ; salicylic acid ; seed set ; sunflower ; sunflower oil ; thousand-seed weight ; Varietal selection. Specialized plant breeding, plant breeding aims ; water stress ; yield ; yield components</subject><ispartof>Journal of agronomy and crop science (1986), 2008-06, Vol.194 (3), p.193-199</ispartof><rights>2008 The Authors. 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Exogenous application of glycinebetaine (GB) and salicylic acid (SA) has been found very effective in reducing the adverse affects of drought stress. This study was conducted to examine the possible role of exogenous GB and SA application in improving the yield of hybrid sunflower (Helianthus annuus L.) under different irrigation regimes. There were three levels of irrigation, viz. control (normal irrigations), water stress at vegetative stage (irrigation missing at vegetative stage) and water stress at flowering stage (irrigation missing at flowering stage). GB and SA were applied exogenously at 100 and 0.724 m m, respectively, each at the vegetative and at the flowering stage. Control plants did not receive application of GB and SA. Water stress reduced the head diameter, number of achene, 1000-achene weight, achene yield and oil yield. Nevertheless, exogenous GB and SA application significantly improved these attributes under water stress. 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Soil science and plant productions</subject><subject>application rate</subject><subject>betaine</subject><subject>Biological and medical sciences</subject><subject>crop yield</subject><subject>developmental stages</subject><subject>diameter</subject><subject>drought</subject><subject>drought tolerance</subject><subject>exogenous application</subject><subject>foliar application</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Genetics and breeding of economic plants</subject><subject>glycinebetaine</subject><subject>Helianthus</subject><subject>Helianthus annuus</subject><subject>inflorescences</subject><subject>irrigation</subject><subject>leaves</subject><subject>plant cultural practices</subject><subject>plant development</subject><subject>proline</subject><subject>salicylic acid</subject><subject>seed set</subject><subject>sunflower</subject><subject>sunflower oil</subject><subject>thousand-seed weight</subject><subject>Varietal selection. 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identifier ISSN: 0931-2250
ispartof Journal of agronomy and crop science (1986), 2008-06, Vol.194 (3), p.193-199
issn 0931-2250
1439-037X
language eng
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source Wiley-Blackwell Read & Publish Collection
subjects Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
application rate
betaine
Biological and medical sciences
crop yield
developmental stages
diameter
drought
drought tolerance
exogenous application
foliar application
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
glycinebetaine
Helianthus
Helianthus annuus
inflorescences
irrigation
leaves
plant cultural practices
plant development
proline
salicylic acid
seed set
sunflower
sunflower oil
thousand-seed weight
Varietal selection. Specialized plant breeding, plant breeding aims
water stress
yield
yield components
title Improving Drought Tolerance by Exogenous Application of Glycinebetaine and Salicylic Acid in Sunflower
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