Journal of Applied Biological Sciences

Yazarlar: Elina YANKOVA, Petka YURUKOVA

Konular:-

Anahtar Kelimeler:Gentiana,Embryology,Male and female gametophyte,Embryo,Endosperm

Özet: Embryological study on the Bulgarian native populations of Gentiana cruciata L. has been carried out. The anther is tetrasporangiate. Its wall develops according to Dicotyledonous-type and consists of epidermis, fibrous endothecium, two middle layers and glandular tapetum. The simultaneous microsporogenesis leads to formation of predominantly tetrahedral microspore tetrads. The mature pollen grains are 2-celled. The ovule is anatropous, tenuinucellate and unitegmic with unicellular archesporium. The development of the embryo sac follows the Polygonum-type and rarely - the Allium-type. The legitimate embryo and endosperm develop after double fertilization. The embryogenesis runs according to Asterad-type. Initially, the endosperm is nuclear. In some ovules somatic apospory was established

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