Graphene oxide-based aerogel stimulates growth, mercury accumulation, photosynthesis-related gene expression, antioxidant efficiency and redox status in wheat under mercury exposure

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dc.contributor.authorAlp-Turgut, Fatma Nur
dc.contributor.authorOzfidan-Konakci, Ceyda
dc.contributor.authorArikan, Busra
dc.contributor.authorComak, Gurbuz
dc.contributor.authorYildiztugay, Evren
dc.date.accessioned2024-02-23T14:02:52Z
dc.date.available2024-02-23T14:02:52Z
dc.date.issued2024
dc.departmentNEÜen_US
dc.description.abstractMercury (Hg) pollution is a global concern in cropland systems. Hg contamination causes a disruption in the growth, energy metabolism, redox balance, and photosynthetic activity of plants. In the removal of Hg toxicity, a recent critical strategy is the use of aerogels with biodegradability and biocompatibility. However, it is unknown how graphene oxide-based aerogels stimulate the defense systems in wheat plants exposed to Hg toxicity. Therefore, in this study, the photosynthetic, genetic, and biochemical effects of reduced graphene oxide aerogel treatments (gA; 50-100-250 mg L-1) were examined in wheat (Triticum aestivum) under Hg stress (50 mu M HgCl2). The relative growth rate (RGR) significantly decreased (84%) in response to Hg stress. However, the reduced RGR and water relations (RWC) of wheat were improved by gA treatments. The impaired gas exchange levels (stomatal conductance, carbon assimilation rate, intercellular CO2 concentrations, and transpiration rate) caused by stress were reversed under Hg plus gAs. Additionally, stress hampered chlorophyll fluorescence (F-v/F-o, F-v/F-m), and under Hg toxicity the expression of psaA genes was reduced (>0.4-fold), but psaB gene was significantly up-regulated (>3-fold) which are the genes involved in PSI. By increasing expression patterns of both genes relating to PSI, gAs reversed the adverse consequences on F-v/F-o and F-v/F-m in the presence of excessive Hg concentration. The activities of glutathione S-transferase (GST), glutathione reductase (GR), catalase (CAT), ascorbate peroxidase (APX) and dehydroascorbate reductase (DHAR) decreased under Hg toxicity. On the other hand, the activities of superoxide dismutase (SOD), APX, GST, and glutathione peroxidase (GPX) increased following gA treatments against stress, leading to the successful elimination of toxic levels of H2O2 and lipid peroxidation (TBARS content) by decreasing the levels by about 30%, and 40%, respectively. By modulating enzyme/non-enzyme activity/contents including the AsA-GSH cycle, gAs contributed to the protection of the cellular redox state. Most important of all, gA applications were able to reduce Hg intake by approximately 66%. Therefore, these results showed that gAs were effective in highly inhibiting Hg uptake and could significantly increase wheat tolerance to toxicity by eliminating Hg-induced oxidative damage and inhibiting metabolic processes involved in photosynthesis. The findings obtained from the study provide a new perspective on the alleviation roles of reduced graphene oxide aerogels as an effective adsorbent for decreasing damages of mercury toxicity in wheat plants.en_US
dc.description.sponsorshipSelcuk University Scientific Research Projects Coordinating Office [23301002]en_US
dc.description.sponsorshipThis work was supported by Selcuk University Scientific Research Projects Coordinating Office (Grant Number: 23301002) .en_US
dc.identifier.doi10.1016/j.envpol.2023.123117
dc.identifier.issn0269-7491
dc.identifier.issn1873-6424
dc.identifier.pmid38086507en_US
dc.identifier.scopus2-s2.0-85179881668en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.envpol.2023.123117
dc.identifier.urihttps://hdl.handle.net/20.500.12452/11861
dc.identifier.volume342en_US
dc.identifier.wosWOS:001138041900001en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofEnvironmental Pollutionen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAerogelsen_US
dc.subjectAntioxidant Systemen_US
dc.subjectReduced Graphene Oxide Aerogelen_US
dc.subjectMercury Stressen_US
dc.subjectPsaa And Psaben_US
dc.subjectTriticum Aestivumen_US
dc.titleGraphene oxide-based aerogel stimulates growth, mercury accumulation, photosynthesis-related gene expression, antioxidant efficiency and redox status in wheat under mercury exposureen_US
dc.typeArticleen_US

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