BÜYÜKKARTAL, H. Nurhan Ankara iniversitesi - Fen Fakültesi - Biyoloji Bölümü, Turkey

The structure of the filiform apparatus in the female gametophyte of the natural tetraploid Trifolium pratense L. (Elçi cayırüçgülü)

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The structure of the filiform apparatus (FA) - a highly thickened structure at the micropylar end of the synergid cells in mature embryo sac - of natural tetraploid Trifolium pratense L. (Elci cayirucgulu) was examined in the stage of mature embryo sac by a light and a transmission electron microscopy. Female organs of flower buds sampled from those at different developmental stages were embedded both in paraffin and epon 812. The filiform apparatus, which exists as a thickened structure in different parts of synergid cells, is seen in the form of a cap under light microscopy. It is stained quite dark. The investigations with transmission electron microscopy showed that the surface of filiform apparatus towards cytoplasm is composed of numerous irregular walls ingrowts and lobes. The cytoplasm associated has a rich a point of mitochondria, ribosomes, dictyosomes, ER masses, lipid and protein bodies, amyloplasts containing large starch grains and vesicles.

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Trifolium pratense L. , mature embryo sac , filiform apparatus

dicle university journal of institute of natural and applied science

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