Different antioxidant defense responses to salt stress during germination and vegetative stages of endemic halophyte Gypsophila oblanceolata Bark.

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dc.contributor.authorSekmen, Askim Hediye
dc.contributor.authorTurkan, Ismail
dc.contributor.authorTanyolac, Zehra Ozgecan
dc.contributor.authorOzfidan, Ceyda
dc.contributor.authorDinc, Ahmet
dc.date.accessioned2019-10-27T21:43:46Z
dc.date.available2019-10-27T21:43:46Z
dc.date.issued2012
dc.departmentEge Üniversitesien_US
dc.description.abstractSalinity is a major limiting factor to agricultural productivity. To ensure future productivity of the agricultural regions and achieve a selection of genetically transformed salt-tolerant plants, there is a need to select and characterize salt-tolerant plants. Gypsophila oblanceolata Bark. is a Turkish endemic and endangered halophyte occurring in salt marshes/hydromorphic soils. The aim of this experiment was to determine the responses of G. oblanceolata to salt stress during germination and vegetative growth. Therefore, effects of salinity (0, 50,100, 150, 300 mM NaCl) on germination and changes in the activities of antioxidant enzymes/isoenzymes (SOD. CAT and PDX) during germination under stress and recovery after stress were determined. Moreover, during vegetative growth (60 d old plants), changes in physiological parameters, ion concentrations, proline (Pro) content, lipid peroxidation (MDA), H2O2 content, NADPH oxidase activity and, antioxidant enzyme/isoenzyme system (superoxide dismutase (SOD), catalase (CAT), peroxidase (PDX), ascorbate peroxidase (APX), glutathione reductase (GR)) were also investigated. Salt stress decreased both the germination percentage and rate. Few seeds germinated at 100 mM NaCl. Exposure to high concentrations of NaCl did not permanently inhibit germination. Salinity (50 mM NaCl) caused a decrease in activities of SOD, CAT and PDX during germination. However, after stress, the activities of all enzymes were increased in recovered-plants. During vegetative growth, increased activities of SOD, CAT and APX in 50 and 100 mM NaCl treated-plants may help to avoid oxidative damage in G. oblanceolata. However, at higher doses, induced stimulation of the CAT, PDX and GR was not sufficient to cope with the enhanced ROS production and MDA level. From the results obtained in present study, it can be suggested that G. oblanceolata is a moderately salt-tolerant species. Differential responses of antioxidant enzymes to salt stress during germination and vegetative growth suggested different antioxidant metabolism in G. oblanceolata. (C) 2011 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipEge University Research FoundationEge University [2010-FEN-067]en_US
dc.description.sponsorshipThis work was supported by Ege University Research Foundation [2010-FEN-067]. The authors wish to thank Dr. Evren Yildiztugay for providing G. oblanceolata seeds and his technical assistance on ICP-AES analyses.en_US
dc.identifier.doi10.1016/j.envexpbot.2011.10.012
dc.identifier.endpage76en_US
dc.identifier.issn0098-8472
dc.identifier.issn1873-7307
dc.identifier.issn0098-8472en_US
dc.identifier.issn1873-7307en_US
dc.identifier.startpage63en_US
dc.identifier.urihttps://doi.org/10.1016/j.envexpbot.2011.10.012
dc.identifier.urihttps://hdl.handle.net/11454/47143
dc.identifier.volume77en_US
dc.identifier.wosWOS:000301025800008en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofEnvironmental and Experimental Botanyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAntioxidant enzymesen_US
dc.subjectGerminationen_US
dc.subjectGypsophila oblanceolataen_US
dc.subjectIon accumulationen_US
dc.subjectSalt stressen_US
dc.subjectVegetative growthen_US
dc.titleDifferent antioxidant defense responses to salt stress during germination and vegetative stages of endemic halophyte Gypsophila oblanceolata Bark.en_US
dc.typeArticleen_US

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