Sexual Plant Reproduction

, Volume 11, Issue 3, pp 148–152

Unexpected DNA content in the endosperm of Cupressus dupreziana A. Camus seeds and its implications in the reproductive process

  • C. Pichot
  • Agnès Borrut
  • Mohamed El Maâtaoui
ORIGINAL PAPER

DOI: 10.1007/s004970050132

Cite this article as:
Pichot, C., Borrut, A. & El Maâtaoui, M. Sex Plant Reprod (1998) 11: 148. doi:10.1007/s004970050132

Abstract

 Nuclear DNA content of embryo and endosperm from mature and immature Cupressus dupreziana A. Camus seeds was estimated using laser flow cytometry. Relative DNA content of endosperm nuclei corresponded to four ploidy levels: 2C, 4C, 6C and 8C. The embryo nuclei invariably exhibited a diploid pattern. In all endosperm tissue analyzed no haploid nucleus was found. This is problematic since, in gymnosperms, endosperm and female gametes originate from one functional haploid megaspore produced by meiosis. The possible origin and derivation of C. dupreziana endosperm are discussed in light of previous results concerning the two other Mediterranean cypresses, C. sempervirens and C. atlantica.

Key words Cupressus duprezianaDNA contentEndospermReproductionFlow cytometryGymnosperm

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • C. Pichot
    • 1
  • Agnès Borrut
    • 1
  • Mohamed El Maâtaoui
    • 2
  1. 1.INRA, Unité de Recherches Forestières Méditerranéennes, Equipe de Génétique Av. Vivaldi, 84000 Avignon, France e-mail: pichot@avignon.inra.fr Tel. +33–4–90 13 59 23; Fax +33–4–90 13 59 59FR
  2. 2.Université d’Avignon, Laboratoire de Biologie Végétale Expérimentale, Avignon, FranceFR