Journal of Applied Biological Sciences

Yazarlar: Ayşe KAPLAN, Hanife İRİS

Konular:-

Anahtar Kelimeler:Seseli resinosum,Apiaceae,Female gametophyte,Male gametophyte

Özet: The male and female gametophyte development in Seseli resinosum Freyn et Sint were studied with alight microscope. Anther wall development follows the dicotyledonous type: epidermis, endothecium, middle layer, and tapetum. The tapetum is secretory andthe tapetal cells are two-, three- and four-nucleate. The microspore tetrads are tetrahedral and isobilateral,and pollen grains are shed during a three cellular stage. The mature ovule is anatropous, tenuinucellar and unitegmic. A funicular obturator is present, and the hypostase is absent. The nucellarepidermis is one layered.Absorption of the nucellus occurs in four-nucleate embryo sac. A linear megaspore tetrad is formed, and the megaspore on the chalazal side remains active. The functional megaspore produces a seven-celled embryosac corresponding to the Polygonumtype. The embryo sac formation is monosporic.

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