The imposex phenomenon provides one of the best examples of endocrine disruption in wildlife and has been studied for about four decades. However, the exact biochemical mechanism by which it develops is still unclear. Several pathways have been proposed: neuroendocrine, steroid and retinoic. In the present work the possible role of retinoid X receptor (RXR) in the development of imposex in Nuce...

Hard-bodied ticks transmit various pathogens, such as Borrelia burgdorferi sensu lato, Anaplasma phagocytophilum, Rickettsia spp., Babesia spp., and carry numerous other microorganisms with an unknown pathogenic potential. Among them, tick-borne encephalitis virus has great importance. In Central European conditions all developmental stages of ticks participate in the zoonotic cycle of the TBE ...

Two stereospecific NADPH-dependent reductases, TR-I and TR-11, constitute a branching point in the biosynthesis of tropane alkaloids. TR-I catalyzes the stereospecific reduction of tropinone to tropine (Koelen and Gross, 1982), whereas TR-I1 reduces tropinone to pseudotropine (Drager et al., 1988). We previously characterized TRs that had been purified from cultured roots of Hyoscyamus niger (H...

Hyoscyamus albus hairy roots with/without an exogenous gene (11 clones) were established by inoculation of Agrobacterium rhizogenes. All clones cultured under iron-deficient condition secreted riboflavin from the root tips into the culture medium and the productivity depended on the number and size of root tips among the clones. A decline of pH was observed before riboflavin production and root...

Acidity is one of the main determinants taste and quality melon fruit, together with sugars volatilecompounds. The aim this study was to investigate inheritance hydrogen potential (pH) titratable acidity in fruit.A randomized block design three replications used evaluate F1and F2generations backcrosses (RC1and RC2) ofthe Védrantais (Cucumis melo subsp. var. reticulatus) high pH low acidity, AC-...