caa a22 4500 445841281 CHVBK 20180317145345.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10725-010-9506-5 doi (NATIONALLICENCE)springer-10.1007/s10725-010-9506-5 Modulation of endogenous levels of some key organic metabolites by exogenous application of glycine betaine in drought stressed plants of sunflower ( Helianthus annuus L.) [Elektronische Daten] [Naeem Iqbal, Yasin Ashraf, Muhammad Ashraf] The present study was conducted to examine the changes in some key metabolites in drought-stressed sunflower plants supplied with glycine betaine externally. Imposition of drought stress at the vegetative or reproductive growth stages decreased the plant dry matter production and increased the accumulation of organic solutes (glycine betaine, proline, soluble proteins, free amino acids and soluble sugars) in two sunflower lines, i.e., Glushan-98 and Suncross. In general, decrease in dry matter production and increase in the endogenous levels of organic solutes, were more pronounced when drought stress applied at the vegetative stage than at the reproductive stage. Glycine betaine applied as a pre-sowing seed treatment was not found to be effective in reducing the negative effects of drought stress in sunflower plants. Foliar application of GB further enhanced the leaf endogenous levels of GB, soluble proteins and total soluble sugars in drought stressed plants without exerting any negative effects on other osmotica. However, this GB-induced increase in endogenous levels of organic solutes was found to be not associated with plant dry matter production under stress conditions. Springer Science+Business Media B.V., 2010 Stress tolerance nationallicence Glycine betaine nationallicence Sunflower nationallicence Iqbal Naeem Department of Botany, GC University, Faisalabad, Pakistan aut Ashraf Yasin Nuclear Institute for Agriculture & Biology (NIAB), Faisalabad, Pakistan aut Ashraf Muhammad Department of Botany, University of Agriculture, Faisalabad, Pakistan aut Plant Growth Regulation Springer Netherlands 63/1(2011-01-01), 7-12 0167-6903 63:1<7 2011 63 10725 https://doi.org/10.1007/s10725-010-9506-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10725-010-9506-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Iqbal Naeem Department of Botany, GC University, Faisalabad, Pakistan aut NATIONALLICENCE 700 1- Ashraf Yasin Nuclear Institute for Agriculture & Biology (NIAB), Faisalabad, Pakistan aut NATIONALLICENCE 700 1- Ashraf Muhammad Department of Botany, University of Agriculture, Faisalabad, Pakistan aut NATIONALLICENCE 773 0- Plant Growth Regulation Springer Netherlands 63/1(2011-01-01), 7-12 0167-6903 63:1<7 2011 63 10725 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer