Comparative embryology of three Gentianaceae species from the Central Caucasus and the European Alps

Akhalkatsi, Maia and Wagner, Johanna (1997) Comparative embryology of three Gentianaceae species from the Central Caucasus and the European Alps. Plant Systematics and Evolution, 204 (1). pp. 39-48. ISSN 1615-6110

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Abstract

A comparative investigation was carried out on the ovule and seed development of three mountain species ofGentianaceae, the perennial speciesGentiana pyrenaica, and the two short-lived monocarpic speciesGentianella caucasea andG. germanica. In all three species most embryological characters conform to those generally found in the family of theGentianaceae. In some features, however,G. pyrenaica and the twoGentianella species differ from each other. InG. pyrenaica the ovule is anatropous, the integument 8–10 layered and the three reduced antipodals degenerate soon after fertilization. In contrast,G. caucasea andG. germanica form a hemitropous ovule, a 4–5 layered integument and up to 16 antipodal cells by secondary multiplication. All three species exhibit differences in synchronization between embryogenesis and endosperm development. Functional relations between the antipodal structure and the dynamics of seed development of the investigated species are postulated.

Item Type:	Article
Subjects:	Q Science > Ecology Q Science > QK Botany
Depositing User:	Prof.Dr. Maia Akhalkatsi
Date Deposited:	30 Jan 2014 12:40
Last Modified:	01 Apr 2015 05:37
URI:	http://eprints.iliauni.edu.ge/id/eprint/748

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