The protective roles of cycteine in enhancing basil (Ocimum basilicum L.) tolerance to arsenic and chromium toxicity by regulating growth, mineral uptake, photosynthetic activity and antioxidative system

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dc.contributor.authorYalcin, Vesile
dc.contributor.authorTorun, Hulya
dc.date.accessioned2026-07-01T11:39:57Z
dc.date.available2026-07-01T11:39:57Z
dc.date.issued2025
dc.departmentDüzce Üniversitesi
dc.description.abstractHeavy metals such as arsenic (As) and chromium (Cr) are dangerous pollutants that pose a significant threat to the environment and human health. Cysteine (Cys), an antioxidant molecule, has an important role in increasing of plant tolerance to heavy metal stress. This study aimed to evaluate the potential ameliorative effects of exogenous Cys (300 mu M) application on the morpho-physio-biochemical processes of basil (Ocimum basilicum L. cv. midnight) seedlings grown under As and Cr contamination. To attain this objective, seedlings were exposed to different concentrations of As (100 and 300 mu M) and Cr (100 and 300 mu M). The results of this research showed that As and Cr toxicity caused a significant decrease in root, stem and leaf lengths, root, stem and leaf fresh and dry weights, relative water content, PSII photochemistry, chlorophyll a, b, total chlorophyll and total carotenoid contents, stomatal conductance, transpiration and net photosynthesis rates. In contrast, As and Cr exposure increased electrolyte leakage, chlorophyll a/b ratio, intercellular CO2 concentration, lipid peroxidation and hydrogen peroxide content. Exogenous Cys application improved growth parameters by increasing photosynthetic activity, reducing membrane damage and oxidative stress levels. As and Cr stress negatively affected the mineral balance in basil seedlings, whereas Cys treatment helped to maintain homeostasis by regulating mineral distribution. Furthermore, the impact of As and Cr toxicity on enzymatic antioxidants, including catalase, superoxide dismutase, peroxidase, ascorbate peroxidase and glutathione reductase, was found to vary depending on the application dose and enzyme type. It was observed that the most significant effect of Cys was on peroxidase activity. Our findings highlight the potential of Cys to alleviate As and Cr stress in basil seedlings, suggesting a promising approach to enhance plant resistance to heavy metal induced toxicity.s
dc.description.sponsorshipTechnological Research Application and Research Centre (DUBIT) -- This research is derived from a part of Vesile Yalcin's PhD thesis. The authors would like to thank Scientific Research Projects Coordinatorship of Duzce University (DUBAP-Grant Number 2023.11.01.1374) for the financial support of this study and Duzce University Scientific and Technological Research Application and Research Centre (DUBIT) for mineral analyses.
dc.identifier.doi10.1016/j.sajb.2025.10.044
dc.identifier.endpage478
dc.identifier.issn0254-6299
dc.identifier.issn1727-9321
dc.identifier.orcid0000-0003-1293-732X
dc.identifier.scopus2-s2.0-105020274009
dc.identifier.scopusqualityQ1
dc.identifier.startpage464
dc.identifier.urihttps://doi.org/10.1016/j.sajb.2025.10.044
dc.identifier.urihttps://hdl.handle.net/20.500.12684/23558
dc.identifier.volume187
dc.identifier.wosWOS:001609803200002
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofSouth African Journal of Botany
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20260623
dc.subjectAntioxidant Defense System
dc.subjectArsenic
dc.subjectBasil
dc.subjectChromium
dc.subjectCysteine
dc.titleThe protective roles of cycteine in enhancing basil (Ocimum basilicum L.) tolerance to arsenic and chromium toxicity by regulating growth, mineral uptake, photosynthetic activity and antioxidative system
dc.typeArticle

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