An Enhancing Effect of Exogenous Mannitol on the Antioxidant Enzyme Activities in Roots of Wheat Under Salt Stress

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dc.contributor.authorSeckin, Burcu
dc.contributor.authorSekmen, Askim Hediye
dc.contributor.authorTurkan, Ismail
dc.date.accessioned2019-10-27T20:19:14Z
dc.date.available2019-10-27T20:19:14Z
dc.date.issued2009
dc.departmentEge Üniversitesien_US
dc.description.abstractThe role of mannitol as an osmoprotectant, a radical scavenger, a stabilizer of protein and membrane structure, and protector of photosynthesis under abiotic stress has already been well described. In this article we show that mannitol applied exogenously to salt-stressed wheat, which normally cannot synthesize mannitol, improved their salt tolerance by enhancing activities of antioxidant enzymes. Wheat seedlings (3 days old) grown in 100 mM mannitol (corresponding to -0.224 MPa) for 24 h were subjected to 100 mM NaCl treatment for 5 days. The effect of exogenously applied mannitol on the salt tolerance of plants in view of growth, lipid peroxidation levels, and activities of antioxidant enzymes in the roots of salt-sensitive wheat (Triticum aestivum L. cv. K & z & ltan-91) plants with or without mannitol was studied. Although root growth decreased under salt stress, this effect could be alleviated by mannitol pretreatment. Peroxidase (POX) and ascorbate peroxidase (APX) activities increased, whereas superoxide dismutase (SOD), catalase (CAT), and glutathione reductase (GR) activities decreased in K & z & ltan-91 under salt stress. However, activities of antioxidant enzymes such as SOD, POX, CAT, APX, and GR increased with mannitol pretreatment under salt stress. Although root tissue extracts of salt-stressed wheat plants exhibited only nine different SOD isozyme bands of which two were identified as Cu/Zn-SOD and Mn-SOD, mannitol treatment caused the appearance of 11 different SOD activity bands. On the other hand, five different POX isozyme bands were determined in all treatments. Enhanced peroxidation of lipid membranes under salt stress conditions was reduced by pretreatment with mannitol. We suggest that exogenous application of mannitol could alleviate salt-induced oxidative damage by enhancing antioxidant enzyme activities in the roots of salt-sensitive K & z & ltan-91.en_US
dc.description.sponsorshipEge University Research FoundationEge Universityen_US
dc.description.sponsorshipThis research was supported by grant-in-aid 2003 Fen 029 from the Ege University Research Foundation. We also thank Dr. Stephen T. Astley (Department of Chemistry, Science Faculty, Ege University) for extensive proofreading of the manuscript.en_US
dc.identifier.doi10.1007/s00344-008-9068-1
dc.identifier.endpage20en_US
dc.identifier.issn0721-7595
dc.identifier.issn1435-8107
dc.identifier.issn0721-7595en_US
dc.identifier.issn1435-8107en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage12en_US
dc.identifier.urihttps://doi.org/10.1007/s00344-008-9068-1
dc.identifier.urihttps://hdl.handle.net/11454/41368
dc.identifier.volume28en_US
dc.identifier.wosWOS:000263497500002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofJournal of Plant Growth Regulationen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAntioxidant enzymesen_US
dc.subjectLipid peroxidationen_US
dc.subjectMannitolen_US
dc.subjectRooten_US
dc.subjectSalinityen_US
dc.subjectWheat (Triticum aestivum L.)en_US
dc.titleAn Enhancing Effect of Exogenous Mannitol on the Antioxidant Enzyme Activities in Roots of Wheat Under Salt Stressen_US
dc.typeArticleen_US

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