Exogenous N-Acetylcysteine alleviates heavy metal stress by promoting phenolic acids to support antioxidant defence systems in wheat roots

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dc.contributor.authorÇolak, Nesrin
dc.contributor.authorTorun, Hülya
dc.contributor.authorGruz, Jiri
dc.contributor.authorStrnad, Miroslav
dc.contributor.authorAyaz, Faik Ahmet
dc.date.accessioned2020-05-01T12:14:14Z
dc.date.available2020-05-01T12:14:14Z
dc.date.issued2019
dc.departmentDÜ, Ziraat Fakültesi, Biyosistem Mühendisliği Bölümüen_US
dc.descriptionGruz, Jiri/0000-0002-8546-9697en_US
dc.descriptionWOS: 000475411500007en_US
dc.descriptionPubMed: 31170649en_US
dc.description.abstractN-acetylcysteine (N-Acetyl L-cysteine, NAC) is a thiol compound derived from the addition of the acetyl group to cysteine amino acid. NAC has been used as an antioxidant, free radical scavenger, and chelating agent for reducing the deleterious effects on plants of biotic and abiotic environmental stresses. It can also relieve heavy metal (HM) toxicity, although its alleviating mechanism remains unknown. In this study, we compared HM-stressed (Cu, Hg, Cd and Pb, 100 mu M each) wheat seedlings without NAC treatment and in combination with NAC (1 mM). In comparison to HMs alone, NAC treatment in combination with HMs (Cu, Cd, Hg and Pb, respectively) stimulated root growth (1.1-, 1.5-, 10.5- and 1.9-fold), and significantly increased fresh (1.3-, 1.5-, 4.3- and 1.4-fold) and dry (1.2-, 1.5-, 2.5- and 1.2-fold) mass. Combination treatment also led to significant reductions in HM concentrations (1.3-, 1.4-, 4- and 1.1-fold, respectively). GSH (1.1 - 1.8-fold), TBARS (1.4 - 2.7-fold) and H2O2 (1.6 - 1.8-fold) contents in treatment with HMs alone were significantly mitigated by the NAC combination. Some of the antioxidant enzyme activities increased or reduced by some HM treatments alone were stimulated by a combination of NAC with HMs, or remained unchanged or changed only insignificantly, supported by the phenolic pool of the plant. Ferulic, p-comaric and syringic acids were the major phenolic acids (PAs) in the roots in free, ester, glycoside and ester-bound forms, and their concentrations were increased by HM treatments alone, in comparison to the control seedlings, while PAs concentrations were relatively reduced by NAC in combination with HMs. These results indicate that NAC can alleviate HM toxicity and improve the growth of HM-stressed wheat seedlings by coordinated induction of the phenolic pool and the antioxidant defence system.en_US
dc.description.sponsorshipResearch Fund of Karadeniz Technical University [FBA-2016-5424]; ERDF project "Plants as a tool for sustainable global development" [CZ.02.1.01/0.0/0.0/16_019/0000827]en_US
dc.description.sponsorshipThe Research Fund of Karadeniz Technical University (Project No: FBA-2016-5424) provided financial support for this research. The work was supported in part from ERDF project "Plants as a tool for sustainable global development" (No. CZ.02.1.01/0.0/0.0/16_019/0000827).en_US
dc.identifier.doi10.1016/j.ecoenv.2019.05.052en_US
dc.identifier.endpage59en_US
dc.identifier.issn0147-6513
dc.identifier.issn1090-2414
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage49en_US
dc.identifier.urihttps://doi.org/10.1016/j.ecoenv.2019.05.052
dc.identifier.urihttps://hdl.handle.net/20.500.12684/6354
dc.identifier.volume181en_US
dc.identifier.wosWOS:000475411500007en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakPubMeden_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAcademic Press Inc Elsevier Scienceen_US
dc.relation.ispartofEcotoxicology And Environmental Safetyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectWheaten_US
dc.subjectTriticum aestivumen_US
dc.subjectHeavy metalen_US
dc.subjectN-acetylcysteineen_US
dc.subjectAntioxidanten_US
dc.subjectPhenolic aciden_US
dc.titleExogenous N-Acetylcysteine alleviates heavy metal stress by promoting phenolic acids to support antioxidant defence systems in wheat rootsen_US
dc.typeArticleen_US

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