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Varga M, Žuna Pfeiffer T, Begović L, Mlinarić S, Horvatić J, Miloloža T, Štolfa Čamagajevac I. Physiological Response of Nutrient-Stressed Lemna gibba to Pulse Colloidal Silver Treatment. Plants (Basel) 2023; 12:1367. [PMID: 36987055 PMCID: PMC10055381 DOI: 10.3390/plants12061367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/23/2023] [Accepted: 03/17/2023] [Indexed: 06/19/2023]
Abstract
Wastewater is a source of many environmental pollutants and potentially high concentrations of essential plant nutrients. Site-specific nutrient levels may influence the response of exposed plants to a chemical stressor. In the present study, we focused on the responses of model aquatic macrophyte swollen duckweed (Lemna gibba L.) to a short pulse exposure and a commercially available colloidal silver product as a potential environmental chemical stressor, combined with two levels of total nitrogen and phosphorus nutrition. Treatment with the commercially available colloidal silver product caused oxidative stress in L. gibba plants under both high and low nutrient levels. Plants grown and treated under high nutrient levels showed lower levels of lipid peroxidation and hydrogen peroxide accumulation, as well as higher levels of photosynthetic pigment content in comparison to treated plants under low nutrient levels. Higher free radical scavenging activity for plants treated with silver in combination with high nutrient levels resulted in better overall protection from silver-induced oxidative stress. The results showed that external nutrient levels significantly affected the L. gibba plant's response to the colloidal silver presence in the environment and that nutrient levels should be considered in the assessment of potential environmental impact for contaminants.
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Šrajer Gajdošik M, Vicić A, Gvozdić V, Galić V, Begović L, Mlinarić S. Effect of Prolonged Photoperiod on Light-Dependent Photosynthetic Reactions in Cannabis. Int J Mol Sci 2022; 23:ijms23179702. [PMID: 36077099 PMCID: PMC9456486 DOI: 10.3390/ijms23179702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/22/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022] Open
Abstract
Industrial hemp is a fast-growing, short-day plant, characterized by high biomass yields and low demands for cultivation. To manipulate growth, hemp is usually cultivated under prolonged photoperiods or continuous light that could cause photooxidative damage and adjustments of photosynthetic reactions. To determine the extent of changes in photosynthetic response caused by prolonged light exposure, we employed chlorophyll a fluorescence measurements accompanied with level of lipid peroxidation (TBARS) and FT-IR spectroscopy on two Cannabis cultivars. Plants were grown under white (W) and purple (P) light at different photoperiods (16/8, 20/4, and 24/0). Our results showed diverse photosynthetic reactions induced by the different light type and by the duration of light exposure in two cultivars. The most beneficial condition was the 16/8 photoperiod, regardless of the light type since it brought the most efficient physiological response and the lowest TBARS contents suggesting the lowest level of thylakoid membrane damage. These findings indicate that different efficient adaptation strategies were employed based on the type of light and the duration of photoperiod. White light, at both photoperiods, caused higher dissipation of excess light causing reduced pressure on PSI. Efficient dissipation of excess energy and formation of cyclic electron transport around PSI suggests that P20/4 initiated an efficient repair system. The P24/0 maintained functional electron transport between two photosystems suggesting a positive effect on the photosynthetic reaction despite the damage to thylakoid membranes.
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Affiliation(s)
- Martina Šrajer Gajdošik
- Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
| | - Antonia Vicić
- Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
| | - Vlatka Gvozdić
- Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
| | - Vlatko Galić
- Agricultural Institute Osijek, Južno predgrađe 17, 31000 Osijek, Croatia
| | - Lidija Begović
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
| | - Selma Mlinarić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
- Correspondence: ; Tel.: +385-31-399-936
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Galić V, Mlinarić S, Marelja M, Zdunić Z, Brkić A, Mazur M, Begović L, Šimić D. Contrasting Water Withholding Responses of Young Maize Plants Reveal Link Between Lipid Peroxidation and Osmotic Regulation Corroborated by Genetic Analysis. Front Plant Sci 2022; 13:804630. [PMID: 35873985 PMCID: PMC9296821 DOI: 10.3389/fpls.2022.804630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Linking biochemistry and genetics of tolerance to osmotic stress is of interest for understanding plant adaptations to unfavorable conditions. The aims of this study were to investigate the variability in responses of panel of elite maize inbred lines to water withholding for stress-related traits through association study and to identify pathways linked to detected associations for better understanding of maize stress responses. Densely genotyped public and expired Plant Variety Protection Certificate (ex-PVP) inbred lines were planted in controlled conditions (16-h/8-h day/night, 25°C, 50% RH) in control (CO) and exposed to 10-day water withholding (WW). Traits analyzed were guaiacol peroxidase activity (GPOD), total protein content (PROT), lipid peroxidation (TBARS), hydrogen peroxide accumulation (H2O2), proline accumulation (proline), and current water content (CWC). Proline accumulation was found to be influenced by H2O2 and TBARS signaling pathways acting as an accumulation-switching mechanism. Most of the associations detected were for proline (29.4%) and TBARS (44.1%). Gene ontology (GO) enrichment analysis showed significant enrichment in regulation of integral membrane parts and peroxisomes along with regulation of transcription and polysaccharide catabolism. Dynamic studies involving inbreds with extreme phenotypes are needed to elucidate the role of this signaling mechanism in regulation of response to water deficit.
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Affiliation(s)
- Vlatko Galić
- Department of Maize Breeding and Genetics, Agricultural Institute Osijek, Osijek, Croatia
| | - Selma Mlinarić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Matea Marelja
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Zvonimir Zdunić
- Department of Maize Breeding and Genetics, Agricultural Institute Osijek, Osijek, Croatia
- Centre of Excellence for Biodiversity and Molecular Plant Breeding (CroP-BioDiv), Zagreb, Croatia
| | - Andrija Brkić
- Department of Maize Breeding and Genetics, Agricultural Institute Osijek, Osijek, Croatia
| | - Maja Mazur
- Department of Maize Breeding and Genetics, Agricultural Institute Osijek, Osijek, Croatia
| | - Lidija Begović
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Domagoj Šimić
- Department of Maize Breeding and Genetics, Agricultural Institute Osijek, Osijek, Croatia
- Centre of Excellence for Biodiversity and Molecular Plant Breeding (CroP-BioDiv), Zagreb, Croatia
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Vuković R, Čamagajevac IŠ, Vuković A, Šunić K, Begović L, Mlinarić S, Sekulić R, Sabo N, Španić V. Physiological, Biochemical and Molecular Response of Different Winter Wheat Varieties under Drought Stress at Germination and Seedling Growth Stage. Antioxidants (Basel) 2022; 11:antiox11040693. [PMID: 35453378 PMCID: PMC9028496 DOI: 10.3390/antiox11040693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 03/29/2022] [Accepted: 03/30/2022] [Indexed: 01/24/2023] Open
Abstract
Due to climate change in recent years, there has been an increasing water deficit during the winter wheat sowing period. This study evaluated six Croatian winter wheat varieties’ physiological, biochemical, and molecular responses under two drought stress levels at the germination/seedling growth stage. Lipid peroxidation was mainly induced under both drought stress treatments, while the antioxidative response was variety-specific. The most significant role in the antioxidative response had glutathione along with the ascorbate-glutathione pathway. Under drought stress, wheat seedlings responded in proline accumulation that was correlated with the P5CS gene expression. Expression of genes encoding dehydrins (DHN5, WZY2) was highly induced under the drought stress in all varieties, while genes encoding transcription factors were differentially regulated. Expression of DREB1 was upregulated under severe drought stress in most varieties, while the expression of WRKY2 was downregulated or revealed control levels. Different mechanisms were shown to contribute to the drought tolerance in different varieties, which was mainly associated with osmotic adjustment and dehydrins expression. Identifying different mechanisms in drought stress response would advance our understanding of the complex strategies contributing to wheat tolerance to drought in the early growth stage and could contribute to variety selection useful for developing new drought-tolerant varieties.
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Affiliation(s)
- Rosemary Vuković
- Department of Biology, University of Osijek, 31000 Osijek, Croatia; (R.V.); (I.Š.Č.); (A.V.); (L.B.); (S.M.); (R.S.); (N.S.)
| | - Ivna Štolfa Čamagajevac
- Department of Biology, University of Osijek, 31000 Osijek, Croatia; (R.V.); (I.Š.Č.); (A.V.); (L.B.); (S.M.); (R.S.); (N.S.)
| | - Ana Vuković
- Department of Biology, University of Osijek, 31000 Osijek, Croatia; (R.V.); (I.Š.Č.); (A.V.); (L.B.); (S.M.); (R.S.); (N.S.)
| | - Katarina Šunić
- Department of Small Cereal Crops, Agricultural Institute Osijek, 31000 Osijek, Croatia;
| | - Lidija Begović
- Department of Biology, University of Osijek, 31000 Osijek, Croatia; (R.V.); (I.Š.Č.); (A.V.); (L.B.); (S.M.); (R.S.); (N.S.)
| | - Selma Mlinarić
- Department of Biology, University of Osijek, 31000 Osijek, Croatia; (R.V.); (I.Š.Č.); (A.V.); (L.B.); (S.M.); (R.S.); (N.S.)
| | - Ramona Sekulić
- Department of Biology, University of Osijek, 31000 Osijek, Croatia; (R.V.); (I.Š.Č.); (A.V.); (L.B.); (S.M.); (R.S.); (N.S.)
| | - Nikolina Sabo
- Department of Biology, University of Osijek, 31000 Osijek, Croatia; (R.V.); (I.Š.Č.); (A.V.); (L.B.); (S.M.); (R.S.); (N.S.)
| | - Valentina Španić
- Department of Small Cereal Crops, Agricultural Institute Osijek, 31000 Osijek, Croatia;
- Correspondence:
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Linić I, Mlinarić S, Brkljačić L, Pavlović I, Smolko A, Salopek-Sondi B. Ferulic Acid and Salicylic Acid Foliar Treatments Reduce Short-Term Salt Stress in Chinese Cabbage by Increasing Phenolic Compounds Accumulation and Photosynthetic Performance. Plants (Basel) 2021; 10:2346. [PMID: 34834709 PMCID: PMC8619474 DOI: 10.3390/plants10112346] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/22/2021] [Accepted: 10/27/2021] [Indexed: 05/04/2023]
Abstract
Salinity stress is one of the most damaging abiotic stresses to plants, causing disturbances in physiological, biochemical, and metabolic processes. The exogenous application of natural metabolites is a useful strategy to reduce the adverse effects of stress on crops. We investigated the effect of foliar application of salicylic acid (SA) and ferulic acid (FA) (10-100 μM) on short-term salt-stressed (150 mM NaCl, 72 h) Chinese cabbage plants. Subsequently, proline level, photosynthetic performance, phenolic metabolites with special focus on selected phenolic acids (sinapic acid (SiA), FA, SA), flavonoids (quercetin (QUE), kaempferol (KAE)), and antioxidant activity were investigated in salt-stressed and phenolic acid-treated plants compared with the corresponding controls. Salt stress caused a significant increase in SA and proline contents, a decrease in phenolic compounds, antioxidant activity, and photosynthetic performance, especially due to the impairment of PSI function. SA and FA treatments, with a concentration of 10 μM, had attenuated effects on salt-stressed plants, causing a decrease in proline and SA level, and indicating that the plants suffered less metabolic disturbance. Polyphenolic compounds, especially FA, SiA, KAE, and QUE, were increased in FA and SA treatments in salt-stressed plants. Consequently, antioxidant activities were increased, and photosynthetic performances were improved. FA resulted in a better ameliorative effect on salt stress compared to SA.
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Affiliation(s)
- Ida Linić
- Department for Molecular Biology, Ruđer Bošković Institute, 10 000 Zagreb, Croatia; (I.L.); (I.P.); (A.S.)
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, 52 440 Poreč, Croatia
| | - Selma Mlinarić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, 31 000 Osijek, Croatia;
| | - Lidija Brkljačić
- Department for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, 10 000 Zagreb, Croatia;
| | - Iva Pavlović
- Department for Molecular Biology, Ruđer Bošković Institute, 10 000 Zagreb, Croatia; (I.L.); (I.P.); (A.S.)
| | - Ana Smolko
- Department for Molecular Biology, Ruđer Bošković Institute, 10 000 Zagreb, Croatia; (I.L.); (I.P.); (A.S.)
| | - Branka Salopek-Sondi
- Department for Molecular Biology, Ruđer Bošković Institute, 10 000 Zagreb, Croatia; (I.L.); (I.P.); (A.S.)
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Mlinarić S, Begović L, Tripić N, Piškor A, Cesar V. Evaluation of Light-Dependent Photosynthetic Reactions in Reynoutria japonica Houtt. Leaves Grown at Different Light Conditions. Front Plant Sci 2021; 12:612702. [PMID: 34421934 PMCID: PMC8371261 DOI: 10.3389/fpls.2021.612702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
The Japanese knotweed (Reynoutria japonica Houtt.) is considered as one of the most aggressive and highly successful invasive plants with a negative impact on invaded habitats. Its uncontrolled expansion became a significant threat to the native species throughout Europe. Due to its extensive rhizome system, rapid growth, and allelopathic activity, it usually forms monocultures that negatively affect the nearby vegetation. The efficient regulation of partitioning and utilization of energy in photosynthesis enables invasive plants to adapt rapidly a variety of environmental conditions. Therefore, we aimed to determine the influence of light conditions on photosynthetic reactions in the Japanese knotweed. Plants were grown under two different light regimes, namely, constant low light (CLL, 40 μmol/m2/s) and fluctuating light (FL, 0-1,250 μmol/m2/s). To evaluate the photosynthetic performance, the direct and modulated chlorophyll a fluorescence was measured. Plants grown at a CLL served as control. The photosynthetic measurements revealed better photosystem II (PSII) stability and functional oxygen-evolving center of plants grown in FL. They also exhibited more efficient conversion of excitation energy to electron transport and an efficient electron transport beyond the primary electron acceptor QA, all the way to PSI. The enhanced photochemical activity of PSI suggested the formation of a successful adaptive mechanism by regulating the distribution of excitation energy between PSII and PSI to minimize photooxidative damage. A faster oxidation at the PSI side most probably resulted in the generation of the cyclic electron flow around PSI. Besides, the short-term exposure of FL-grown knotweeds to high light intensity increased the yield induced by downregulatory processes, suggesting that the generation of the cyclic electron flow protected PSI from photoinhibition.
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Affiliation(s)
- Selma Mlinarić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Lidija Begović
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Neven Tripić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Antonija Piškor
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Vera Cesar
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
- Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
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Pavlović I, Mlinarić S, Tarkowská D, Oklestkova J, Novák O, Lepeduš H, Bok VV, Brkanac SR, Strnad M, Salopek-Sondi B. Early Brassica Crops Responses to Salinity Stress: A Comparative Analysis Between Chinese Cabbage, White Cabbage, and Kale. Front Plant Sci 2019; 10:450. [PMID: 31031786 PMCID: PMC6470637 DOI: 10.3389/fpls.2019.00450] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 03/25/2019] [Indexed: 05/13/2023]
Abstract
Soil salinity is severely affecting crop productivity in many countries, particularly in the Mediterranean area. To evaluate early plant responses to increased salinity and characterize tolerance markers, three important Brassica crops - Chinese cabbage (Brassica rapa ssp. pekinensis), white cabbage (B. oleracea var. capitata) and kale (B. oleracea var. acephala) were subjected to short-term (24 h) salt stress by exposing them to NaCl at concentrations of 50, 100, or 200 mM. Physiological (root growth, photosynthetic performance parameters, and Na+/K+ ratio) and biochemical parameters (proline content and lipid peroxidation as indicated by malondialdehyde, MDA, levels) in the plants' roots and leaves were then measured. Photosynthetic parameters such as the total performance index PItotal (describing the overall efficiency of PSI, PSII and the intersystem electron transport chain) appeared to be the most salinity-sensitive parameter and informative stress marker. This parameter was decreased more strongly in Chinese cabbage than in white cabbage and kale. It indicated that salinity reduced the capacity of the photosynthetic system for efficient energy conversion, particularly in Chinese cabbage. In parallel with the photosynthetic impairments, the Na+/K+ ratio was highest in Chinese cabbage leaves and lowest in kale leaves while kale root is able to keep high Na+/K+ ratio without a significant increase in MDA. Thus Na+/K+ ratio, high in root and low in leaves accompanying with low MDA level is an informative marker of salinity tolerance. The crops' tolerance was positively correlated with levels of the stress hormone abscisic acid (ABA) and negatively correlated with levels of jasmonic acid (JA), and jasmonoyl-L-isoleucine (JA-Ile). Furthermore, salinity induced contrasting changes in levels of the growth-promoting hormones brassinosteroids (BRs). The crop's tolerance was positively correlated with levels of BR precursor typhasterol while negatively with the active BR brassinolide. Principal Component Analysis revealed correlations in observed changes in phytohormones, biochemical, and physiological parameters. Overall, the results show that kale is the most tolerant of the three species and Chinese cabbage the most sensitive to salt stress, and provide holistic indications of the spectrum of tolerance mechanisms involved.
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Affiliation(s)
- Iva Pavlović
- Department of Molecular Biology, Ruđer Bošković Institute, Zagreb, Croatia
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences, Palacký University, Olomouc, Czechia
| | - Selma Mlinarić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Danuše Tarkowská
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences, Palacký University, Olomouc, Czechia
| | - Jana Oklestkova
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences, Palacký University, Olomouc, Czechia
| | - Ondřej Novák
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences, Palacký University, Olomouc, Czechia
| | - Hrvoje Lepeduš
- Faculty of Humanities and Social Sciences, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
- Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Valerija Vujčić Bok
- Division of Botany, Department of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - Sandra Radić Brkanac
- Division of Botany, Department of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - Miroslav Strnad
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences, Palacký University, Olomouc, Czechia
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Cesar V, Jozić I, Begović L, Vuković T, Mlinarić S, Lepeduš H, Borović Šunjić S, Žarković N. Cell-Type-Specific Modulation of Hydrogen Peroxide Cytotoxicity and 4-Hydroxynonenal Binding to Human Cellular Proteins In Vitro by Antioxidant Aloe vera Extract. Antioxidants (Basel) 2018; 7:antiox7100125. [PMID: 30241411 PMCID: PMC6210414 DOI: 10.3390/antiox7100125] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 09/14/2018] [Accepted: 09/17/2018] [Indexed: 12/21/2022] Open
Abstract
Although Aloe vera contains numerous bioactive components, the activity principles of widely used A. vera extracts are uncertain. Therefore, we analyzed the effects of genuine A. vera aqueous extract (AV) on human cells with respect to the effects of hydrogen peroxide (H2O2) and 4-hydroxynonenal (HNE). Fully developed A. vera leaves were harvested and analyzed for vitamin C, carotenoids, total soluble phenolic content, and antioxidant capacity. Furthermore, human cervical cancer (HeLa), human microvascular endothelial cells (HMEC), human keratinocytes (HaCat), and human osteosarcoma (HOS) cell cultures were treated with AV extract for one hour after treatment with H2O2 or HNE. The cell number and viability were determined using Trypan Blue, and endogenous reactive oxygen species (ROS) production was determined by fluorescence, while intracellular HNE–protein adducts were measured for the first time ever by genuine cell-based HNE–His ELISA. The AV extract expressed strong antioxidant capacities (1.1 mmol of Trolox eq/g fresh weight) and cell-type-specific influence on the cytotoxicity of H2O2, as well as on endogenous production of ROS and HNE–protein adducts induced by HNE treatment, while AV itself did not induce production of ROS or HNE–protein adducts at all. This study, for the first time, revealed the importance of HNE for the activity principles of AV. Since HMEC cells were the most sensitive to AV, the effects of AV on microvascular endothelia could be of particular importance for the activity principles of Aloe vera extracts.
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Affiliation(s)
- Vera Cesar
- Department of Biology, Josip Juraj Strossmyer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
- Faculty of Dental Medicine and Health, Josip Juraj Strossmyer University of Osijek, Cara Hadrijana 10/E, 31000 Osijek, Croatia.
| | - Iva Jozić
- Department of Biology, Josip Juraj Strossmyer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Lidija Begović
- Department of Biology, Josip Juraj Strossmyer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Tea Vuković
- Laboratory for Oxidative Stress (LabOS), Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia.
| | - Selma Mlinarić
- Department of Biology, Josip Juraj Strossmyer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Hrvoje Lepeduš
- Faculty of Dental Medicine and Health, Josip Juraj Strossmyer University of Osijek, Cara Hadrijana 10/E, 31000 Osijek, Croatia.
- Faculty of Humanities and Social Sciences, Josip Juraj Strossmyer University of Osijek, L. Jägera 9, 31000 Osijek, Croatia.
| | - Suzana Borović Šunjić
- Laboratory for Oxidative Stress (LabOS), Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia.
| | - Neven Žarković
- Laboratory for Oxidative Stress (LabOS), Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia.
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Mlinarić S, Antunović Dunić J, Skendrović Babojelić M, Cesar V, Lepeduš H. Differential accumulation of photosynthetic proteins regulates diurnal photochemical adjustments of PSII in common fig (Ficus carica L.) leaves. J Plant Physiol 2017; 209:1-10. [PMID: 27987432 DOI: 10.1016/j.jplph.2016.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 05/27/2023]
Abstract
Molecular processes involved in photosystem II adaptation of woody species to diurnal changes in light and temperature conditions are still not well understood. Regarding this, here we investigated differences between young and mature leaves of common fig (Ficus carica L.) in photosynthetic performance as well as accumulation of the main photosynthetic proteins: light harvesting complex II, D1 protein and Rubisco large subunit. Investigated leaf types revealed different adjustment mechanisms to keep effective photosynthesis. Rather stable diurnal accumulation of light harvesting complex II in mature leaves enabled efficient excitation energy utilization (negative L-band) what triggered faster D1 protein degradation at high light. However, after photoinhibition, greater accumulation of D1 during the night enabled them faster recovery. So, the most photosynthetic parameters, as the maximum quantum yield for primary photochemistry, electron transport and overall photosynthetic efficiency in mature leaves successfully restored to their initial values at 1a.m. Reduced connectivity of light harvesting complexes II to its reaction centers (positive L-band) in young leaves increased dissipation of excess light causing less pressure to D1 and its slower degradation. Decreased electron transport in young leaves, due to reduced transfer beyond primary acceptor QA- most probably additionally induced degradation of Rubisco large subunit what consequently led to the stronger decrease of overall photosynthetic efficiency in young leaves at noon.
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Affiliation(s)
- Selma Mlinarić
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | - Jasenka Antunović Dunić
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | | | - Vera Cesar
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | - Hrvoje Lepeduš
- Faculty of Humanities and Social Sciences, Josip Juraj Strossmayer University of Osijek, L. Jägera 9, HR-31000 Osijek, Croatia.
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Begović L, Mlinarić S, Antunović Dunić J, Katanić Z, Lončarić Z, Lepeduš H, Cesar V. Response of Lemna minor L. to short-term cobalt exposure: The effect on photosynthetic electron transport chain and induction of oxidative damage. Aquat Toxicol 2016; 175:117-26. [PMID: 27015565 DOI: 10.1016/j.aquatox.2016.03.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 03/03/2016] [Accepted: 03/08/2016] [Indexed: 05/06/2023]
Abstract
The effect of two concentrations of cobalt (Co(2+)) on photosynthetic activity and antioxidative response in Lemna minor L. were assessed 24, 48 and 72h after the start of the exposure. Higher concentration of cobalt (1mM) induced growth inhibition while lower concentration (0.01mM) increased photosynthetic pigments content. Analysis of chlorophyll a fluorescence transients revealed high sensitivity of photosystem II primary photochemistry to excess of Co(2+) especially at the higher concentration where decreased electron transport beyond primary quinone acceptor QA(-) and impaired function of oxygen evolving complex (OEC) was observed. Due to impairment of OEC, oxygen production was decreased at higher Co(2+) concentration. Activity of superoxide dismutase was mainly inhibited while lipid peroxidation increased, at both concentrations, indicating that cobalt-induced oxidative damage after short exposure and moreover, susceptibility of the membranes in the cell to cobalt toxicity. Results obtained in this study suggest possible application of used parameters as tools in assessment of early damage caused by metals.
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Affiliation(s)
- Lidija Begović
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | - Selma Mlinarić
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | - Jasenka Antunović Dunić
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | - Zorana Katanić
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | - Zdenko Lončarić
- Faculty of Agriculture, Josip Juraj Strossmayer University of Osijek, Ulica kralja Petra Svačića 1d, HR-31000 Osijek, Croatia.
| | - Hrvoje Lepeduš
- Faculty of Humanities and Social Sciences, Josip Juraj Strossmayer University of Osijek, Lorenza Jägera 9, HR-31000 Osijek, Croatia.
| | - Vera Cesar
- Josip Juraj Strossmayer University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
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Vuk T, Peraica AP, Mlinarić S, Jaksić B. Autoimmune thrombocytopenia in adults: clinical experience. Acta Med Croatica 1997; 51:175-9. [PMID: 9248118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Diagnostic and treatment algorithms in autoimmune thrombocytopenia (AITP) are still somewhat controversial. We present our experience in the diagnosis and treatment of 39 AITP patients, hospitalized at our department between 1990 and 1995, and discuss alternative approaches. There were 10 male and 29 female patients, median age 47 (range 18-75) years. All patients had isolated thrombocytopenia and normal or increased number of megakaryocytes in bone marrow. Platelet count lower than 15 x 10(9)/L was found in 25 (64.1%) patients. Eighteen (54.5%) patients responded well to standard and two (6.1%) to high doses of steroids, whereas 18.2% of the patients responded well to other immunosuppressive therapy. Antiplatelet antibodies were found only in 4 (10.2%) patients. Our conclusion was that a half of adult AITP patients achieve satisfactory recovery on standard doses of steroids.
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Affiliation(s)
- T Vuk
- Department of Hematology, Merkur University Hospital, Zagreb, Croatia
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