Artículo
Age-related changes in root traits are linked to internal nitrogen cycling in the perennial forb Physaria (Brassicaceae)
Fecha de publicación:
08/2021
Editorial:
Gauthier-Villars/Editions Elsevier
Revista:
Acta Oecologica
ISSN:
1146-609X
e-ISSN:
1873-6238
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Age-related changes in root morphology and physiology, and the relationship with N dynamics between species that differ in resource use (i.e., conservative or acquisitive) and lifespan strategies are largely unexplored and experimental evidence very scarce. Objective: to compare age-related changes in root traits and their relationship with internal N recycling in two co-generic perennial species differing in their resource-use strategy and plant lifespan. We hypothesized that the root system of both species will become more conservative with age, but the root system of the acquisitive short-lived Physaria pinetorum (Brassicaceae) will decrease its acquisition capacity while the conservative long-lived P. mendocina will increase its storage capacity. Results and conclusion: we confirmed that the root system of both species shifts from acquisitive to conservative with age, reducing N acquisition and relying either on N translocation from leaves or root stores to sustain growth and grain filling. As hypothesized, the species responded differentially according to their longevity and resource-use strategy: P. pinetorum showed a great loss of acquisition and storage capacities with absolute age, and turned to N stores when acquisition was deficient while P. mendocina increased storage capacity with age and obtained N from resorption to sustain allocation to grain, decreasing the quality of its litter. Species differing in their plant lifespan and resource use strategies have different patterns of N dynamics with age, that could affect yield stability and the provision of ecosystem services.
Palabras clave:
N LEAF
,
N RESORPTION
,
N STORAGE
,
PROFICIENCY
,
RTD
,
SRL
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Pastor Pastor, Alejandro; Vilela, Alejandra Elena; González Paleo, Luciana; Age-related changes in root traits are linked to internal nitrogen cycling in the perennial forb Physaria (Brassicaceae); Gauthier-Villars/Editions Elsevier; Acta Oecologica; 111; 103729; 8-2021; 1-6
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