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Artículo

Xylem efficiency vs. safety: Acclimation to drought of seedling root anatomy for six Patagonian shrub species

Durante, MartínIcon ; Maseda, P. H.; Fernandez Alduncin, Roberto JavierIcon
Fecha de publicación: 05/2011
Editorial: Academic Press Ltd - Elsevier Science Ltd
Revista: Journal of Arid Environments
ISSN: 0140-1963
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ciencias de las Plantas, Botánica

Resumen

With the aim to seek evidences on the possible trade off between hydraulic efficiency and hydraulic safety, from both an evolutionary and an acclimation point of view, we compared root xylem anatomy and derived functional properties for seedlings of six Patagonian shrub species grown in a greenhouse under two levels of water availability (control and drought). Root central cylinder area, vessel diameter (b) and double-wall thickness (t) were measured; from these data, the sum of vessel radii to the fourth power and wall strength [(t/b)2] were calculated as indicators of hydraulic efficiency and safety respectively. Across species, we observed only a weak negative correlation between hydraulic efficiency and hydraulic safety. Within species, Lycium chilense, the species with the most mesic leaves of the group, showed significant acclimation to drought for both functional attributes, lowering efficiency and increasing safety by developing a higher proportion of small and more resistant xylem vessels.
Palabras clave: ANARTHROPHYLLUM RIGIDUM , CHUQUIRAGA AUREA , CHUQUIRAGA KINGII , HYDRAULIC EFFICIENCY , HYDRAULIC SAFETY , LYCIUM CHILENSE , MULINUM SPINOSUM
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/97667
URL: http://www.sciencedirect.com/science/article/pii/S0140196310003198
DOI: http://dx.doi.org/10.1016/j.jaridenv.2010.12.001
Colecciones
Articulos(IFEVA)
Articulos de INST.D/INV.FISIOLOGICAS Y ECO.VINCULADAS A L/AGRIC
Citación
Durante, Martín; Maseda, P. H.; Fernandez Alduncin, Roberto Javier; Xylem efficiency vs. safety: Acclimation to drought of seedling root anatomy for six Patagonian shrub species; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 75; 5; 5-2011; 397-402
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