Embryology of Gentiana angulosa and G. pontica (Gentianaceae)

Akhalkatsi, Maia and Gvaladze, Guranda and Gachechiladze, Mzia and Taralashvili, Natela (2004) Embryology of Gentiana angulosa and G. pontica (Gentianaceae). Proceedings of the Georgian Academy of Sciences Biological series B, 2 (1/2). pp. 29-34. ISSN 1512 - 2123

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Abstract

Embryology of two gentians - Gentiana angulosa and G. pontica, has been studied for the first time. They show similar morphology and are considered to be relative species. Embryological study has revealed considerable similarity in structure of reproductive organs of G. angulosa and G. pontica. The common characters are: four-loculate anther; 2-celled mature pollen; superior, cenocarpous and paracarpous ovary; unitegmic, tenuinucellate and anatropous ovule; hypodermal unicellular archesporium; linear tetrad of megaspores; Polygonum type embryo sac; pre-mitotic type of fertilization; nuclear endosperm and Solanad type of embryogenesis. The investigated species differ mainly by two quantitative features – numbers of cell layers in the integument (5-8 in G. angulosa, 9-10 in G. pontica) and the antipodals (3-6 in G. angulosa, 3 in G. pontica). The structural difference is only slightly expressed in seed coat structure, which has taxonomic significance.

Item Type: Article
Subjects: Q Science > QK Botany
Depositing User: Prof.Dr. Maia Akhalkatsi
Date Deposited: 24 Feb 2014 07:50
Last Modified: 24 Mar 2015 11:02
URI: http://eprints.iliauni.edu.ge/id/eprint/1180

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