Background and objectives: Many members of the Amaryllidaceae are regarded as toxic. The toxic constituents that occur in the whole family are referred to as the Amaryllidaceae alkaloids. The main aim of this study was the identification of alkaloid compounds from Galanthus transcaucasicus Fomin, a medicinal plant from Amaryllidaceae. Methods: Planar a...

The noctuid, Helicoverpa armigera, is the most important crop pest worldwide. We evaluated the biological activity of soybean trypsin inhibitor and plant lectins against this pest to identify toxin genes for deployment through transgenic plants. Of the seven plant lectins tested, chickpea and snowdrop lectins showed marked antibiotic effects in terms of insect survival and development. Larval s...

The Galanthus nivalis agglutinin (GNA) is synthesized as a preproprotein. To corroborate the role of the different targeting peptides in the topogenesis of GNA and related proteins, different constructs were made whereby both the complete original GNA gene and different truncated sequences were coupled to the enhanced green fluorescent protein (EGFP). In addition, a GNA ortholog from rice that ...

Poly(A)-rich RNA isolated from ripening ovaries of snowdrop (Galanthus nivalis L.) yielded a single 17-kDa lectin polypeptide upon translation in a wheat-germ cell-free system. This lectin was purified by affinity chromatography. Translation of the same RNA in Xenopus leavis oocytes revealed a lectin polypeptide which was about 2 kDa smaller than the in vitro synthesized precursor, suggesting t...

Jelen tanulmány a Pilis délnyugati lábánál levő homoki gyertyános-tölgyeseinek (Corydali pumilae-Carpinetum) és cseres-tölgyesek (Fraxino orno-Quercetum cerridis) társulási viszo­nyait mutatja be 10-10 cönológiai felvétel alapján. A gyertyános-tölgyesek faji összetételére Fagetalia ele­mek viszonylag magas aránya jellemző. Lokálisan nevezetes fajai Veratrum nigrum, Piptatherum virescens, Primul...