Scientific journal
Scientific Review. Biological science
ISSN 2500-3399
ПИ №ФС77-57454

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EMBRYOLOGICAL STUDY RESEARCH OF IRIS TYPHIFOLIA KITAG.

Dorofeeva M.M. 1 Vereshchagina V.A. 2 Novoselova L.V. 2
1 Perm State Agricultural Academy
2 Perm State National Research University
Ovule development, including megasporogenesis and stages of megagametogenesis were studied for the first time in Iris typhifolia Kitag. Sporogenesis, gametogenesis of I. typhifolia were observed using the normal paraffin method. Ovule development, , occurred while flowers were still in bud. The results are as follows: the ovary is trilocular with axile placenta, the ovule is anatropous, bitegmic and crassinucellate. The archesporial cell below the nucellar epidermis undergoes periclinal division producing the primary parietal and the primary sporogenous cells. The cells at the base of the funiculus and along the placenta form obturator. Successive cytokinesis in the megasporocyte usually produces tetrad, and the chalazal megaspore of the tetrad develops into a Polygonum-type embryo sac. Final maturation of the seven-celled embryo sac occurs during the florescence.