Artículo
Are seed mass and seedling size and shape related to altitude? Evidence in Gymnocalycium monvillei (Lem.) Britton & Rose (Cactaceae)
Bauk, Karen
; Pérez Sánchez, Reyes; Zeballos, Sebastián Rodolfo
; Las Peñas, Maria Laura
; Flores, Joel; Gurvich, Diego Ezequiel
Fecha de publicación:
05/2015
Editorial:
Natl Research Council Canada-n R C Research Press
Revista:
Botany
ISSN:
1916-2790
1916-2804
1916-2804
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Several studies reported a negative relationship between altitude and seed mass. In cactus species, seed mass has been also related to seedling morphology (size and shape). Here we studied Gymnocalycium monvillei (Lem.) Britton & Rose, a cactus species with a wide altitudinal distribution, with the main aim of analyzing how altitude affects seed mass and seedling size (height and width) and shape (globose or columnar seedlings). We collected seeds from five sites along the entire altitudinal distribution of the species in Córdoba Mountains (sites were located between 878 and 2230 m a,s.l,), encompassing a marked climatic gradient (6 °C of mean annual temperature difference between the extreme sites). Seed mass and seedling traits were measured in the laboratory. Seedling height increased with altitude, whereas seed mass was not related to this parameter. Seedlings became more globose (reduced surface/volume ratio) with decreasing altitude. Variation in seedling shape along the altitudinal gradient may be related to the contrasting climatic conditions to which seedlings are exposed, and could account for the wide altitudinal distribution of G. monvillei. Our results highlight the importance of seedling traits in the species response to climatic change.
Palabras clave:
Altitudinal Gradients
,
Gymnocalycium
,
Seed Mass
,
Seedling Morphology
,
Cactaceae
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Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Citación
Bauk, Karen; Pérez Sánchez, Reyes; Zeballos, Sebastián Rodolfo; Las Peñas, Maria Laura; Flores, Joel; et al.; Are seed mass and seedling size and shape related to altitude? Evidence in Gymnocalycium monvillei (Lem.) Britton & Rose (Cactaceae); Natl Research Council Canada-n R C Research Press; Botany; 93; 8; 5-2015; 529-533
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