Resumen de On the embryology of Brassica jordanoffii (Brassicaceae) – an endemic species in the Bulgarian flora
Elina Yankova-Tsvetkova, Petka Yurukova-Grancharova, Vladimir Vladimirov
An embryological study of Brassica jordanoffii was carried out. The anther is tetrasporangiate and its wall of Monocotyledonous-type development consists of: epidermis, endothecium, one middle layer and glandular tapetum. Predominantly tetrahedral microspore tetrads form after simultaneous microsporogenesis. The mature pollen grains are three-celled. The mature ovule is ana-amphytropous, crassinucellate, bitegmic with unicellular archesporium that functions as a megaspore mother cell after cutting off one or two parietal cells. Development of the embryo sac is of the Polygonum type. The embryo and endosperm develop after Onagrad-type embryogenesis. A relatively high pollen and embryo viability was estimated.
