title: COMPARISON OF METHYL JASMONATE AND CADMIUM EFFECT ON SELECTED PHYSIOLOGICAL PARAMETERS IN SCENEDESMUS QUADRICAUDA (CHLOROPHYTA, CHLOROPHYCEAE)(1).
abstract: Effect of methyl jasmonate (MeJA) in the concentrations of 10 or 100 μM on selected physiological parameters in Scenedesmus quadricauda (Turp.) Bréb. after 24 h of exposure was studied. Results were compared with the application of general toxic metal (cadmium, Cd) to identify MeJA-specific responses. Accumulation of reactive oxygen species (ROS; hydrogen peroxide and superoxide) was the most elevated by 10 μM MeJA and 100 μM Cd, while total chls showed decrease (Cd) and increase (MeJA) in these variants. The amount of carotenoids and cell viability were affected neither by MeJA nor by Cd application. The sum of free amino acids was considerably elevated by 10 μM Cd (increase in histidine, threonine, arginine, leucine, and lysine mainly) but depleted by 100 μM MeJA (14 from 17 compounds decreased), while accumulation of soluble proteins was unaffected by Cd and enhanced by MeJA. Cadmium application reduced the amount of Ca and also Mg in the case of 100 μM Cd, while MeJA had no effect on the content of mineral nutrients. Total Cd content reached 557 and 1,334 μg · g(-1) dry weight (dwt) in 10 and 100 μM Cd variant, respectively. Intracellular Cd uptake was ca. 55% from total Cd content in both Cd variants. The present findings are discussed in the context of the available literature, and possible explanations are suggested.
authors.affiliation: Department of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak Republic.
authors.forename: Jozef
authors.initials: J
authors.lastname: Kováčik
authors.affiliation: Department of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak Republic.
authors.forename: Bořivoj
authors.initials: B
authors.lastname: Klejdus
authors.affiliation: Department of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak Republic.
authors.forename: František
authors.initials: F
authors.lastname: Štork
authors.affiliation: Department of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak Republic.
authors.forename: Josef
authors.initials: J
authors.lastname: Hedbavny
authors.affiliation: Department of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak RepublicDepartment of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech RepublicDepartment of Botany, Institute of Biology and Ecology, Faculty of Science, P. J. Šafárik University, Mánesova 23, 041 67 Košice, Slovak Republic.
authors.forename: Martin
authors.initials: M
authors.lastname: Bačkor
keywords: algae; amino acids; calcium; heavy metals; oxidative stress