On the embryology of Brassica jordanoffii (Brassicaceae) – an endemic species in the Bulgarian flora

• Autores: Elina Yankova-Tsvetkova, Petka Yurukova-Grancharova, Vladimir Vladimirov
• Localización: Phytologia Balcanica: International Journal of Balkan Flora and Vegetation, ISSN 1310-7771, Vol. 22, Nº. 2, 2016, págs. 149-153
• Idioma: inglés
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• Resumen

  • 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.