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Pollen development and germination were adversely affected by the presence of mercury, whereas low-concentrations stimulated the whole procedure. Mercury caused morphological anomalies during the tube growth, characterized by irregularly increasing diameters and swelling tips. The main effect was the anomalous cell wall formation at the tip where a substantial number of organelles were found reducing...
Anatomical and ultrastructural investigations of the glandular trichomes of aboveground organs of the white horehound (Marrubium vulgare L.) were carried out. Additionally, identification of the main components of the secreted products was conducted. The following types of glandular structures were found: peltate with a stalk cell and a large eight-celled head and capitate trichomes, which were divided...
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