Exogenous Nitric Oxide (as Sodium Nitroprusside) Ameliorates Polyethylene Glycol-Induced Osmotic Stress in Hydroponically Grown Maize Roots

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dc.contributor.authorYildiztugay, Evren
dc.contributor.authorOzfidan-Konakci, Ceyda
dc.contributor.authorKucukoduk, Mustafa
dc.date.accessioned2024-02-23T13:43:43Z
dc.date.available2024-02-23T13:43:43Z
dc.date.issued2014
dc.departmentNEÜen_US
dc.description.abstractThe present study was designed to examine whether exogenous sodium nitroprusside (SNP) supplementation has any ameliorating action against PEG-induced osmotic stress in Zea mays cv. FRB-73 roots. Twenty percent or 40 % polyethylene glycol (PEG6000; -0.5 MPa and -1.76 MPa, respectively) treatment alone or in combination with 150 and 300 mu M SNP was applied to hydroponically grown maize roots for 72 h. Although only catalase (CAT) activity increased when maize roots were exposed to PEG-induced osmotic stress, induction of this antioxidant enzyme was inadequate to detoxify the extreme levels of reactive oxygen species, as evidenced by growth, water content, superoxide anion radical (O (2) (aEuro cent a') ), hydroxyl radical (OHaEuro cent) scavenging activity, and TBARS content. However, supplementation of PEG-exposed specimens with SNP significantly alleviated stress-induced damage through effective water management and enhancement of antioxidant defense markers including the enzymatic/non-enzymatic systems. Exogenously applied SNP under stress resulted in the up-regulation of glutathione peroxidase (GPX), glutathione S-transferase (GST), ascorbate peroxidase (APX), glutathione reductase (GR), total ascorbate, and glutathione contents involved in ascorbate-glutathione cycle. On the other hand, growth rate, osmotic potential, CAT, APX, GR, and GPX increased in maize roots exposed to both concentrations of SNP alone, but activities of monodehydroascorbate reductase (MDHAR) and dehydroascorbate reductase decreased. Based on the above results, an exogenous supply of both 150 and 300 mu M SNP to maize roots was protective for PEG-induced toxicity. The present study provides new insights into the mechanisms of SNP (NO donor) amelioration of PEG-induced osmotic stress damages in hydroponically grown maize roots.en_US
dc.description.sponsorshipSelcuk University Scientific Research Projects Coordinating Office [13401087]en_US
dc.description.sponsorshipFinancial support for this work was provided by Selcuk University Scientific Research Projects Coordinating Office (project number: 13401087).en_US
dc.identifier.doi10.1007/s00344-014-9417-1
dc.identifier.endpage696en_US
dc.identifier.issn0721-7595
dc.identifier.issn1435-8107
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-84893818717en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage683en_US
dc.identifier.urihttps://doi.org/10.1007/s00344-014-9417-1
dc.identifier.urihttps://hdl.handle.net/20.500.12452/10890
dc.identifier.volume33en_US
dc.identifier.wosWOS:000341502100019en_US
dc.identifier.wosqualityQ2en_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 Defense Systemen_US
dc.subjectOsmotic Stressen_US
dc.subjectNitric Oxideen_US
dc.subjectReactive Oxygen Speciesen_US
dc.subjectSodium Nitroprussideen_US
dc.subjectZea Maysen_US
dc.titleExogenous Nitric Oxide (as Sodium Nitroprusside) Ameliorates Polyethylene Glycol-Induced Osmotic Stress in Hydroponically Grown Maize Rootsen_US
dc.typeArticleen_US

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