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

Fernández-Pascual, Eduardo; Jiménez-Alfaro, Borja; García-Torrico, Ana I.; Perez Garcia, Felix y 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.

Descripción

Título: Germination ecology of the perennial Centaurium somedanum, a specialist species of mountain springs
Autor/es:
  • Fernández-Pascual, Eduardo
  • Jiménez-Alfaro, Borja
  • García-Torrico, Ana I.
  • Perez Garcia, Felix
  • Díaz, Tomás E.
Tipo de Documento: Artículo
Título de Revista/Publicación: Seed Science Research
Fecha: 2012
Volumen: 22
Materias:
Escuela: E.U.I.T. Agrícolas (UPM)
Departamento: Biología Vegetal [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 15763
Identificador DC: http://oa.upm.es/15763/
Identificador OAI: oai:oa.upm.es:15763
Depositado por: Memoria Investigacion
Depositado el: 25 Jul 2013 11:05
Ultima Modificación: 21 Abr 2016 16:03
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