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Study of polyamine metabolism in cell division and their role in physiological plant processes
Gemperlová, Lenka ; Cvikrová, Milena (advisor) ; Šebela, Marek (referee) ; Havel, Ladislav (referee)
3. AIMS To study the role of PA biosynthesis,oxidation and conjugation in maintenanceof free intracellular PA levelsduring the growth and cell cycle of tobacco BY-2 cell culture (Nicotiana tabacum L.cv. Bright Yellow-2). Partial aims: o To describe alterations in the levels of free PA and PA conjugated with HCA during the growth and cell cycle oftobaccoBY-2 cell culture. o To charaďerjzechangesin the activities of PA bioqynthetic en4/mes(ADC, ODC and SAMDC) during the growth and cell cycle oftobacco BY-2 cell culture. o To detenrrinatechangesin the activiý of PA degradation en4fme (DAO) duringthegrowthandcell cycle of tobacco BY-2 cell culture. Following (next)aims: o To evaluatealterationsin the levels of intracellular free and conjugatedPA in tobacco BY-2 cell culture under Cd2*- inducedoxidativestress. o To studythemechanismsof PA homeostasis(biosynthesis, degradation and conjugation) during the diurnal cycle oftobacco plant(Nicotiana tabacumL. cv. Wisconsin 38). o To evaluate the role of excreted PA in PA homeostasis dwing the growth cycle of tobacco BY-2 and alfalfa (MedicagosativaL.) cell suspensionculture. o To comparechangesin the PA metabolismduring somatic and zygotic embryodevelopmentof Norway spruce(Picea abiesL. (Kars|). 7

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