Male and Female Gametophyte Development of Seseli resinosum (Apiaceae)

Yıl 2016, Cilt: 10 Sayı: 3, 1 - 8, 01.11.2016

Ayşe Kaplan Hanife İris

Öz

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

Anahtar Kelimeler

Seseli resinosum, Apiaceae, female gametophyte, male gametophyte