The humic acid-induced changes in the water status, chlorophyll fluorescence and antioxidant defense systems of wheat leaves with cadmium stress

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dc.contributor.authorOzfidan-Konakci, Ceyda
dc.contributor.authorYildiztugay, Evren
dc.contributor.authorBahtiyar, Mustafa
dc.contributor.authorKucukoduk, Mustafa
dc.date.accessioned2020-03-26T19:56:20Z
dc.date.available2020-03-26T19:56:20Z
dc.date.issued2018
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe using of bio-stimulant in plants grown under stress conditions for enhancing nutrition efficiency and crop quality traits is an effective approach. One of the bio-stimulants, humus material, is defined as humic acid (HA). HA application as a promotion of plant growth to plants grown in the heavy metals-contaminated soils has promised hope in terms of effects on plants but the its limiting effect is the application dose. Therefore, the wheat seedlings were grown in hydroponic culture for 21 d and the various concentrations of humic acid (HA; 750 or 1500 mg L-1) were treated alone or in combination with cadmium (Cd) stress (100 or 200 mu M) for 7 d. The results showed that after Cd stress treatment, water content (RWC), osmotic potential (psi(Pi)) and chlorophyll fluorescence parameters decreased and proline content (Pro) increased for 7 d. In spite of activated peroxidase (PDX) and ascorbate peroxidase (APX), stress induced the toxic levels of hydrogen peroxide (H2O2) accumulation. Cd stress triggered lipid peroxidation (TBARS content). HA application successfully eliminated the negative effects of stress on RWC, psi(Pi) and photosynthetic parameters. In the presence of HA under stress, the increased activation of superoxide dismutase (SOD), catalase (CAT) and NADPH-oxidase (NOX) enzymes and ascorbate, glutathione and GSH/GSSG ratio observed. Only 750 mg L-1 HA under stress conditions induced the activities of monodehydroascorbate reductase (MDHAR) and dehydroascorbate reductase (DHAR), and dehydroascorbate (DHA) content. After the combined application of HA and Cd stress, the low contents of H2O2 and TBARS maintained in wheat leaves. Hence, HA successfully eliminated the toxicity of Cd stress by modulating the water status, photosynthetic apparatus and antioxidant activity in wheat leaves.en_US
dc.description.sponsorshipSelcuk UniversitySelcuk University [15401012]; Necmettin Erbakan University Scientific Research Projects Coordinating OfficeKonya Egitim Training & Research Hospital [161215002]en_US
dc.description.sponsorshipFinancial support for this work was provided by Selcuk University and Necmettin Erbakan University Scientific Research Projects Coordinating Office (Project nos. 15401012 and 161215002, respectively).en_US
dc.identifier.doi10.1016/j.ecoenv.2018.02.071en_US
dc.identifier.endpage75en_US
dc.identifier.issn0147-6513en_US
dc.identifier.issn1090-2414en_US
dc.identifier.pmid29510311en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage66en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.ecoenv.2018.02.071
dc.identifier.urihttps://hdl.handle.net/20.500.12395/37046
dc.identifier.volume155en_US
dc.identifier.wosWOS:000428834500009en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_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.selcuk20240510_oaigen_US
dc.subjectAntioxidant systemen_US
dc.subjectCadmium stressen_US
dc.subjectHumic aciden_US
dc.subjectReactive oxygen speciesen_US
dc.subjectWater contenten_US
dc.titleThe humic acid-induced changes in the water status, chlorophyll fluorescence and antioxidant defense systems of wheat leaves with cadmium stressen_US
dc.typeArticleen_US

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