Przeglądaj wg Autor "Rokosa, Marta"

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  • Miniatura
    PozycjaOpen Access
    Effects of 2-hydroxybenzoic acid on the efficiency of the photosynthetic apparatus of basket willow (Salix viminalis L.) plant growing under conditions of salt stress
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2017) Mikiciuk, Małgorzata; Malinowska, Katarzyna; Wróbel, Jacek; Ptak, Piotr; Studziński, Mateusz; Rokosa, Marta; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin
    The study conducted in 2016 at the Department of Plant Physiology and Biochemistry at the West Pomeranian University of Technology in Szczecin was to evaluate the effect of exogenous application of 2-hydroxybenzoic acid (salicylic acid) on the efficiency of the photosynthetic apparatus of basket willow growing under conditions of elevated salt concentration. The first experimental factor was the concentration of sodium chloride (control – complete Hoagland medium, 3.0 g NaCl ∙ dm–3) and second was the concentration of 3-hydroxybenzoic acid (control – complete Hoagland medium, 138 mg ∙ dm–3). The Tora clone tolerated a short period of exposure to the NaCl concentration, as evidenced by high values of Performance Index (PI), Area, and maximum, potential efficiency of photochemical reaction in PS II determined after darkening adaptation, after reduction of acceptors in PS II (FV/FM). Longer plant exposure to salinity resulted in a decrease value of TFM parameter in the Tora clone, and PI and FV/FM in Bjor clone. The application of 2-hydroxybenzoic acid had a varied effect on chlorophyll "a" fluorescence induction parameters of basket willow growing under salt stress conditions. The use of 2-hydroxybenzoic acid increased the parameters such as chlorophyll fluorescence growth time from the beginning of the measurement to the maximum (TFM) and FV/FM in the Bjor clone with prolonged exposure to higher NaCl concentrations. For the Tora clone, the PI value decreased.
  • Miniatura
    PozycjaOpen Access
    Effects of deficiency and excess of phosphorus and potassium in hydroponics on selected physiological and biometrical traits of basket willow (Salix viminalis L.)
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2017) Rokosa, Marta; Mikiciuk, Małgorzata; Wróbel, Jacek; Łowicka, Milena; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin
    Basket willow (Salix viminalis L.) is one of so-called energy crops, which are used to renewable energy source. In conducted research rated effects of deficiency and excess of phosphorus and potassium on selected physiological traits of two willow genotypes: ‘Bjor’ and ‘Tora’ in hydroponics. The purpose of the study was to select genotype which is more resistant to disturbed trophic relationships in the environment. To full Hoagland medium (control sample) added 20% and 40% phosphorus and potassium and also reduced the content of these elements by 20% and 40%. A number of shoots produced by plants, the length the shoots, yield of the fresh and dry mass of the aboveground and root systems and water balance of both examined willows were determined. The results indicated that the ‘Tora’ and ‘Bjor’ are similarly resistant to variable nutritional conditions by phosphorus and potassium.
  • Miniatura
    PozycjaOpen Access
    Wpływ niedoboru wody na stan fizjologiczny wybranych gatunków z rodzaju Fragaria w uprawie wazonowej, hydroponicznej i kulturach in vitro
    (Zachodniopomorski Uniwersytet Technologiczny w Szczecinie, 2022) Rokosa, Marta; Mikiciuk, Małgorzata promotor; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Kształtowania Środowiska i Rolnictwa; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Kształtowania Środowiska i Rolnictwa