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- MakaleYalnız künye2020Scopus SJRQ4Biochemical responses of some (Helianthus annuus L.) cultivars to the interaction effects of biodegradable polymer and salt stress
Akbulut, Gulcin Beker; Torgut, Gulben
Salt stress is one of the most important environmental factor limiting plant growth and causing serious agricultural problems in the world. Biodegradable poly(ethylene oxide)-co-(ε-caprolactone) poly(EO-co-ε-CL) copolymer synthesized by ring-opening polymerization (ROP) have been used to reduce this negative effect. For the characterization of this copolymer, the Fourier Transform Infrared (FT-IR), Proton Nuclear Magnetic Resonance (1H-NMR), Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) techniques were used. To investigate the impact of copolymer and salt (200 mM NaCl) singly and in combination, on two different sunflowers (Helianthus annuus L. cv. 'Düet' and Helianthus annuus L. cv. 'Meteor') a series of experiments were established. In the seedlings grown for 21 days, differences in some metabolic parameters such as chlorophyll-a (Chl-a), chlorophyll-b (Chl-b), carotenoids (Car), total chlorophyll (Chl), total carbohydrate content, and malondialdehyde (MDA) content were examined. According to the result of our study, after the application of NaCl and poly(EO-co-ε-CL), significant changes were observed in the studied biochemical parameters. It was observed that the copolymer in both species had a healing effect against salt stress. Application of 200 mM NaCl caused an increase in MDA of both genotype, particularly in 'Meteor'. Higher Chl-a, Chl-b, total Chl, and Car contents were observed in 'Meteor' as compared to that in 'Düet' under saline conditions. Total carbohydrate content decreased with increasing salt stress in both cultivars.
AtıfScopus1
İncele - MakaleYalnız künye2018Scopus SJRQ1Effects of salicylic acid and organic selenium on wheat (Triticum aestivum L.) exposed to fenoxaprop-p-ethyl
Akbulut, Gulcin Beker; Yigit, Emel; Kaya, Armagan; Aktas, Aydın
In this study, we evaluated effects of fenoxaprop-p-ethyl herbicide on wheat (Triticum aestivum L.). The wheat plants were grown in pots containing perlite. Fenoxaprop-p-ethyl was applied to adequately grown T. aestivum plants at determined doses (1 mM, 1.5 mM, 2.2 mM, 3.4 mM and 5.1 mM) via spraying. The effects of this herbicide on some antioxidant enzymes, lipid peroxidation, carotenoid, total chlorophyll and total phenolic were investigated on days 1, 5 and 10 following the application. Environmental pollutants cause oxidative stress, production of free radicals and changes in antioxidants. Synthesis of signal molecules such as salicylic acid (SA) is important for the stress response of plants. In addition to this, although selenium is known not to be an obligatory element for plants, low dose selenium has positive effects on the plant growth. We also investigated the effects that are elicited on parameters above mentioned by the treatment of exogenous 0.5 mM SA and 0.004 mM organic selenium (SeI) separately. Our findings reveal that SA and SeI, which are externally applied before the germination of seeds that are exposed to herbicide stress, becomes effective in reduction of the negative effects of fenoxaprop-p-ethyl, with regard to antioxidant system, lipid peroxidation, pigment system and total phenolic. When we evaluate the study results, our findings suggest that especially SA plays a protective role on wheat against herbicide stress.
AtıfScopus21WoS19OpenAlex24
İncele - MakaleYalnız künye2016Scopus SJRQ3EFFECT OF SALICYLIC ACID AND SELENIUM ON ANTIOXIDANT SYSTEM OF AVENA SATIVA L. UNDER FENOXAPROP-P-ETHYL STRESS
Yigit, Emel; Akbulut, Gulcin Beker; Bayram, Dilek; Kaya, Armagan; Gok, Yetkin
The present study focuses on understanding the role of different antioxidants in plant defense against oxidative stress caused by fenoxaprop-p-ethyl herbicide. Besides ameliorative effect of exogenously applied salicylic acid (SA) and selenium (Se) on fenoxaprop-p-ethyl-induced toxicity was examined in Avena sativa L. It was determined that the MDA (malondialdehyde) content in the groups to which only herbicide was applied was higher than that of the groups to which SA and Se applied together with the herbicide. In plants exposed to fenoxaprop-p-ethyl, the activities of peroxidase (POD), ascorbate peroxidase (APX), superoxide dismutase (SOD), glutathione S-transferase (GST), glutathione reductase (GR) and content of glutathione (GSH) increased in the treatment groups compared to the control groups. The antioxidant activity increased in the control and treatment groups that were pre-treated with SA and Se compared to the groups that were not pre-treated with SA and Se. While catalase activity (CAT) decreased in SA pre-treated plants, it increased in Se pre-treated plants. These results indicate that the fenoxaprop-p-ethyl induces various plant defense responses in target plants and that treatment with exogenous SA and Se can increase stress resistance by altering these responses.
AtıfWoS6İncele - MakaleYalnız künye2014Scopus SJRQ3THE EFFECTS OF REACTIVE PHTHALOCYANINE BLUE TEXTILE DYE ON PEROXIDASE ACTIVITY, LIPID PEROXIDATION AND TOTAL CHLOROPHYLL CONTENT OF PHASEOLUS VULGARIS L. CV. GINA
Kaya, Armagan; Yigit, Emel; Akbulut, Gulcin Beker; Ates, Burhan
In this study, the effects of Reactive Phthalocyanine Blue (RPB) changes on peroxidase, malondialdehyde (MDA) content and total chlorophyll content of Phaseolus vulgaris L. (bean) were examined. The beans were exposed to different concentrations of RPB between 200-1255 mg/L. In the analyzed plants, different effects were observed on peroxidase activity. When compared to the control group, a significant decrease was identified in the plants which were treated with RPB except for the 1255 mg/L application group. Besides the effects of RPB on MDA content were analyzed. MDA content was found to be lower in all application groups except for 439 mg/L. In addition, total chlorophyll content increased in all application groups except for 338 mg/L when compared to the control group. These findings indicated that RPB caused significant changes in peroxidase activity, MDA content and total chlorophyll. It was shown that the textile dye had a toxic effect on the plants.
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