Mirta Tkalec

University of Zagreb

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ŽV

Željka Vidaković-Cifrek

University of Zagreb

Biljana Balen

University of Zagreb

Petra Cvjetko

University of Zagreb

Petra Peharec Štefanić

University of Zagreb

Krešimir Malarić

University of Zagreb

Renata Biba

Rudjer Boskovic Institute

Branka Pevalek‐Kozlina

University of Zagreb

MĆ

Mirna Ćurković‐Perica

University of Zagreb

SŠ

Sandra Šikić

Andrija Stampar Teaching Institute of Public Health

Marin Ježić

University of Zagreb

Cooperative Institutions

University of Zagreb

116

Rudjer Boskovic Institute

University of Osijek

University of Faisalabad

University of Agriculture Faisalabad

University Hospital Centre Zagreb

University of Ljubljana

Instituto de Pesquisas Energéticas e Nucleares

National Nuclear Energy Commission

Universidade de São Paulo

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Physiological, ultrastructural and proteomic responses of tobacco seedlings exposed to silver nanoparticles and silver nitrate

Chemosphere (2018)

Petra Peharec Štefanić Petra Cvjetko Renata Biba Ana-Marija Domijan Ilse Letofsky‐Papst

Silver nanoparticle

Silver nitrate

10.1016/j.chemosphere.2018.06.128

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Citations (57)

Photochemical Efficiency, Content of Photosynthetic Pigments and Phenolic Compounds in Different Pitcher Parts of Sarracenia Hybrids

Acta Botanica Croatica (2016)

Martina Tušek Marcela Curman Marija Babić Mirta Tkalec

Abstract Sarracenia is a genus of carnivorous plants characterised by leaves modified into pitchers which lure, trap and digest insects. The aim of this study was to analyse the photochemical efficiency and contents of photosynthetic pigments and phenolic compounds in different pitcher parts – operculum, wing, pitchertube upper part and pitcher-tube lower part of three morphologically different Sarracenia hybrids. The photochemical efficiency of the operculum and the pitcher-tube upper part was lower than that of the pitcher-tube lower part and wing, especially in hybrid B. In all hybrids, the wing had higher amount of chlorophyll a than other pitcher parts. In contrast, a higher amount of phenolic compounds, in particular anthocyanins, was measured in the operculum and the pitcher-tube upper part, parts which are red-coloured and participate in luring and trapping insects. Although there were some differences among the hybrids, the results show that amount of phenolic compounds and photosynthetic pigments as well as photochemical efficiency are related to the function of the pitcher part analysed.

Operculum (bryozoa)

10.1515/botcro-2016-0036

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The effect of 1800 MHz electromagnetic field on oxidative stress parameters in earthworms (Eisenia fetida)

International Conference on Software, Telecommunications and Computer Networks (2010)

Sanja Banjeglav Krešimir Malarić Mirta Tkalec

There is increasing evidence about prooxidative effects of radiofrequency/microwave electromagnetic field (RF/MW EMF) exposure. In the present work, induction of oxidative stress was evaluated in earthworms Eisenia fetida. Animals were exposed to RF/MW EMF of 1800 MHz and electric field strength of 23 V/m (0.14 mW/cm2) in the Half-Cone Transversal Electromagnetic (HCTEM) cell during 2 hours. Temperature inside earthworms was measured before and after the exposure to see if it has increased due to radiation. QuickField simulation of the HCTEM cell was made in order to calculate specific absorption rate (SAR), because SAR level is also an indicator of thermal stress. Obtained data showed an increase of lipid peroxidation, while the level of reduced glutathione decreased after exposure. Activity of catalase and glutathione S-transferase was higher in exposed animals. Temperature measurements showed there was no temperature increase in exposed animals (compared with control). Calculated SAR also excluded thermal stress. In conclusion, our results showed that RF/MW EMF radiation of 1800 MHz at electric field strength of 23 V/m can induce oxidative stress in E. fetida without any observable temperature increase.

Eisenia fetida

Specific absorption rate

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Fotosintetska učinkovitost, udio fotosintetskih pigmenata i fenolnih spojeva te antioksidacijska aktivnost u različitim dijelovima vrčeva u tri hibrida roda Sarracenia

Martina Tušek Marcela Curman Marija Babić Mirta Tkalec

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Gene flow vs. pollution pressure: Genetic diversity of Mytilus galloprovincialis in eastern Adriatic

Aquatic Toxicology (2013)

Anamaria Štambuk Maja Šrut Zlatko Šatović Mirta Tkalec Göran Klobučar

Environmental Pollution

10.1016/j.aquatox.2013.03.017

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Citations (25)

Expression of HSP70 isoforms in Lemna minor exposed to cadmium and salinity

Mirta Tkalec Biljana Balen Hrvoje Fulgosi Željka Vidaković-Cifrek Ivan Regula

Heat shock proteins belonging to the HSP70 family have been proposed as a biochemical marker of environmental stress because they are induced by a broad range of stress factors (Neumann et al., 1994). Lemna minor is aquatic macrophyte widely used for toxicity evaluation due to numerous advantages, but mostly growth parameters have been used (Lewis 1995). The objective of this study was to determine expression of HSP70 in Lemna minor exposed to haevy metal and salinity. Duckweed Lemna minor was grown 14 days in axenic and controlled conditions on media with 0.01 mM CdCl2 or 100 mM NaCl. Plant extracts were made in Tris/HCl buffer pH 8.0 (Staples and Stahmann 1964) and protein content was determined (Bradford 1976). Proteins were separated by SDS-PAGE (Laemmli 1970) and electroblotted to nitrocellulose membranes (Towbin et al., 1979). Membranes were probed with a polyclonal antibody to plant HSP70. Western blot analysis of plants grown 14 days in presence of 0.01 mM cadmium or 100 mM NaCl showed expression of two HSP70 isoforms, 80 kDa and 78 kDa. In control plants as well as in plants shortly exposed to stresses (6 days) only isoform of 80 kDa was noticed. Our results suggest that expression of HSP70 is common response to different stresses so it can be used as a biochemical marker of environmental stress using Lemna minor as test organism. References: Bradford MM. 1976. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Anal Biochem 72 ; 248-254. Laemmli UK. 1970. Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature 227 ; 680-685. Lewis MA. 1995. Use of freshwater plants for phytotoxycity testing: A review. Environ Poll 87 ; 319-336. Neumann D, Lichtenberger O, Gunther D, Tschiersch K, Nover L. 1994. Heat-shock proteins induce heavy-metal tolerance in higher plants. Planta 194 ; 360-367. Towbin H, Staehelin T, Gordon J. 1979. Electrophoretic transfer of proteins from polyacrylamide gels to nitrocellulose sheets: procedure and some applications. Proc Natl Acad Sci USA 76 ; 4350-4354. Staples RC, Stahmann MA. 1964. Changes in proteins and several enzymes in susceptible bean leaves after infection by the bean rust fungus. Phytopatology 54 ; 760-764.

Lemna minor

Lemna

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Silver nanoparticles phytotoxicity mechanisms

Elsevier eBooks (2021)

Renata Biba Petra Peharec Štefanić Petra Cvjetko Mirta Tkalec Biljana Balen

Silver nanoparticle

Phytotoxicity

10.1016/b978-0-12-823528-7.00026-3

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Citations (4)

Any Way the Wind Blows Does Really Matter in Lichen Response to Air Pollution from an Oil Refinery

Toxics (2025)

Maja Maslać Mikulec Saša Likić Oleg Antonić Mirta Tkalec

Lichens serve as effective bioindicators for air pollution studies, yet most biomonitoring research focuses primarily on the distance from pollution sources, often neglecting wind data that could elucidate the spread of airborne pollutants. In our previous study in Slavonski Brod, Croatia, we utilized data from a monitoring station, emphasizing the impact of meteorological conditions, particularly wind, on the dispersal of pollutants from a neighbouring oil refinery. To gain a deeper understanding of air pollution dynamics, here, we studied lichen vitality—measured through photochemical efficiency and photosynthetic pigments—alongside the metal (Ni, Zn, Cd, Pb) and non-metal (sulphur and nitrogen) content in native lichen species Flavoparmelia caperata across 17 plots within a 20 km radius of the refinery. Our analysis employed generalized linear models (GLMs) to incorporate various environmental predictors, including distance from the refinery, direction-specific wind speed and frequency, vegetation density, and the orientation of lichen samples with respect to north and the refinery. Findings show that pollution levels are significantly influenced, not only by distance but also by direction-specific wind patterns, underscoring the necessity of including these variables in future biomonitoring studies and highlighting a critical need for air quality management interventions.

Refinery

Oil pollution

10.3390/toxics13030160

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Comparative study on the effects of silver nanoparticle and silver ions on disturbance of antioxidant system in roots of tobacco plants

Karla Košpić Renata Biba Petra Cvjetko Peharec Štefanić Petra Mirta Tkalec

Silver nanoparticle

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Influence of digested wastewater sludge on early growth of the perennial ryegrass (Lolium perenne L.)