Physicochemical and Antioxidant Responses of St. John's Wort (Hypericum perforatum L.) under Drought Stress

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dc.contributor.authorEroğlu, Engin
dc.contributor.authorUsta, Elmas Ülkühan
dc.contributor.authorTorun, Hülya
dc.contributor.authorYalçın, Vesile
dc.date.accessioned2023-07-26T11:54:47Z
dc.date.available2023-07-26T11:54:47Z
dc.date.issued2021
dc.departmentDÜ, Orman Fakültesi, Peyzaj Mimarlığı Bölümüen_US
dc.departmentDÜ, Ziraat Fakültesi, Biyosistem Mühendisliği Bölümüen_US
dc.description.abstractThis study investigated the effects of drought stress on the physiological and biochemical responses of the medicinal and aromatic plant Hypericum perforatum (St. John’s Wort). Changes were determined in leaf length, relative water content (RWC), osmotic potential, chlorophyll fluorescence (Fv/Fm), lipid peroxidation (TBARS), hydrogen peroxide ($H_2O_2$), and proline content as well as in the antioxidant system enzyme activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POX), ascorbate peroxidase (APX), and glutathione reductase (GR). These responses were examined in relation to the tolerance of drought stress in H. perforatum. Ninety-dayold seedlings were subjected to drought for three weeks. The physiological parameters of leaf length, RWC, Fv/Fm, and osmotic potential were reduced under drought. The $H_2O_2$, TBARS, and proline levels were increased significantly under drought stress. Moreover, the proline content increase was greatly pronounced (25.9-fold) compared to the control groups. The high accumulation of proline may have resulted from the 83.8% leaf RWC still remaining under drought stress. On the other hand, the SOD, CAT, and GR enzyme activities were enhanced, whereas the POX and APX activities were reduced. The results indicate that improved tolerance to drought stress in H. perforatum plants may be accomplished through increased capacity of the antioxidative defense system.en_US
dc.identifier.doi10.29130/dubited.847860
dc.identifier.endpage50en_US
dc.identifier.issn2148-2446
dc.identifier.issue1en_US
dc.identifier.startpage40en_US
dc.identifier.trdizinid496514en_US
dc.identifier.urihttp://doi.org/10.29130/dubited.847860
dc.identifier.urihttps://search.trdizin.gov.tr/yayin/detay/496514
dc.identifier.urihttps://hdl.handle.net/20.500.12684/12924
dc.identifier.volume9en_US
dc.indekslendigikaynakTR-Dizinen_US
dc.institutionauthorUsta, Elmas Ülkühan
dc.institutionauthorEroğlu, Engin
dc.institutionauthorTorun, Hülya
dc.institutionauthorYalçın, Vesile
dc.language.isoenen_US
dc.relation.ispartofDüzce Üniversitesi Bilim ve Teknoloji Dergisi
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.snmz$2023V1Guncelleme$en_US
dc.titlePhysicochemical and Antioxidant Responses of St. John's Wort (Hypericum perforatum L.) under Drought Stressen_US
dc.typeArticleen_US

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