Kopcińska J.,Łotocka B., Kowalczyk K. and Kobryń J.

The pistil of Solanum muricatum Aiton was composed of two carpels joined in a folded condition. The ovary was bilocular with a central placenta. The ovules were anatropous, unitegmic and tenuinucellar. The megaspore mother cell underwent meiosis in buds with the corolla shorter than the calyx, producing a linear tetrad. Embryo sac development was Polygonum-type. The embryo sacs were examined when corolla and calyx were the same length. In older ovules the hyposthase became visible. The cells in the center of the style formed a solid column of transmitting tissue. The papillate stigma was of the wet type. No anatomical or ultrastructural disturbances that would prevent seed set were observed in floral organ development.

Key words: Pepino, embryo sac development, synergid, egg cell, antipodals, transmitting tissue