Germination ecology of the perennial Centaurium somedanum, a specialist species of mountain springs

Fernández-Pascual, Eduardo and Jiménez-Alfaro, Borja and García-Torrico, Ana I. and Perez Garcia, Felix and Díaz, Tomás E. (2012). Germination ecology of the perennial Centaurium somedanum, a specialist species of mountain springs. "Seed Science Research", v. 22 ; pp. 195-205. ISSN 0960-2585.

Description

Title: Germination ecology of the perennial Centaurium somedanum, a specialist species of mountain springs
Author/s:
  • Fernández-Pascual, Eduardo
  • Jiménez-Alfaro, Borja
  • García-Torrico, Ana I.
  • Perez Garcia, Felix
  • Díaz, Tomás E.
Item Type: Article
Título de Revista/Publicación: Seed Science Research
Date: 2012
ISSN: 0960-2585
Volume: 22
Subjects:
Faculty: E.U.I.T. Agrícolas (UPM)
Department: Biología Vegetal [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

To improve understanding of how a rare endemic species of Centaurium adapts to a specialized ecological niche, we studied the germination ecology of the mountain spring specialist, C. somedanum, a perennial species restricted to an unusual habitat for this genus. We conducted laboratory experiments with fresh seeds collected from two populations for three consecutive years, to investigate: (1) the effect of temperature and light ongermination; (2) the existence of seed dormancy; and (3) inter-population and inter-annual variation in germinability. Germination occurred only in the light and at relatively low temperatures (15?228C) with no differences between constant and alternating regimes, and a significant decrease at high temperatures (258C and 308C). We found non-deep simple morphophysiological dormancy and variation in seed germinability depending on the year of seed collection. C. somedanum diverged from the common germination characteristics of the genus in: (1) its germination at lower temperatures, which contrasts with what is generally expected in wetland species but could be adaptive in the spring habitat; and (2) its morphophysiological dormancy, which we report here for the first time in the genus and which could be an adaptation to its mountain habitat.

More information

Item ID: 15763
DC Identifier: http://oa.upm.es/15763/
OAI Identifier: oai:oa.upm.es:15763
Deposited by: Memoria Investigacion
Deposited on: 25 Jul 2013 11:05
Last Modified: 21 Apr 2016 16:03
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