|
Descripción
|
|
|---|---|
| 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 (15-228ºC) with no differences between constant and alternating regimes, and a significant decrease at high temperatures (258ºC and 308ºC). 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. | |
|
Internacional
|
Si |
|
JCR del ISI
|
Si |
|
Título de la revista
|
Seed Science Research |
|
ISSN
|
0960-2585 |
|
Factor de impacto JCR
|
1,059 |
|
Información de impacto
|
|
|
Volumen
|
|
|
DOI
|
10.1017/s0960258512000062 |
|
Número de revista
|
22 |
|
Desde la página
|
195 |
|
Hasta la página
|
205 |
|
Mes
|
SIN MES |
|
Ranking
|
|