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

Personal portfolio

EMBRYOLOGICAL STUDY RESEARCH OF SPECIES OF IRIS L. SUBGENUS LIMNIRIS (TAUSCH) SPACH

Dorofeeva M.M. 1
1 Perm State National Research University
Sporogenesis, gametogenesis, fertilization and embryogenesis of Iris pseudacorus L., I. sanguinea Hornem., I. setosa Pall. ex Link and I. sibirica L. were observed using the normal paraffin method. 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. Successive cytokinesis in the megasporocyte usually produces tetrad, and the chalazal megaspore of the tetrad develops into a Polygonum-type embryo sac. Analysis of the structure and development of ovules reveals the following diagnostic embryological features: the presence or absence in micropyle radially elongated epidermal cells glandular in appearance, ratio of length of the outer and inner integument, increasing the number of antipodals, persistence of synergids and antipodals after fertilization.