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Analýza vývoje klíčních transgenních rostlin Arabidopsis thaliana nadprodukující cytokinin-glukosid specifické ß-glukosidasy Zm-p60.1
 Štuříková, Helena
In this bachelor thesis the localization of the maize beta-glukosidase Zm-p60.1 was studied in transgenic Arabidopsis plants using histochemical staining and confocal microscopy. Zm-p60.1 plays an important role in cytokinin metabolism, where it participates in the reversible activation of zeatin from its inactive storage form - zeatin-O-glucoside. Histochemical staining confirmed the expression of Zm-p60.1 in root tips, leaf tissues and vasculature. Subsequent, confocal microscopy using a fluorescently (GFP)-labeled version of Zm-p60.1 revealed localization in chloroplasts, plastids (in root tips) and in xylem of vasculature. Localization of Zm-p60.1 in chloroplasts and plastids in Arabidopsis correlates with previous studies in maize (Kristoffersen et al., 2000) and tobacco (Kiran et al., 2006), which indicates the stability of Zm-p60.1 targeting. The expression of Zm-p60.1 in the vasculature is an unexpected finding and needs to be clarified in future research.
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