Miniatura

Fitxers

690508.pdf (1.65 MB)

Tipus de document

Article

Versió

Versió acceptada

Data de publicació

2019-12-01

Tots els drets reservats

Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/157840

No preferential C-allocation to storage over growth in clipped birch and oak saplings

Títol de la revista

Autors

Director/Tutor

ISSN de la revista

Títol del volum

Recurs relacionat

https://doi.org/10.1093/treephys/tpaa011

Resum

Herbivory is one of the most globally distributed disturbances affecting C-cycling in trees, yet our understanding of how it alters tree C-allocation to different functions like storage, growth or rhizodeposition is still limited. We performed continuous 13C-labelling coupled to a clipping experiment to quantify the effects of simulated browsing on the growth, leaf morphology and relative allocation of stored vs. recently assimilated C to the growth (bulk biomass) and non-structural carbohydrate (NSC) stores (soluble sugars and starch) of the different organs of two tree species with contrasting wood anatomy: diffuse-porous (Betula pubescens) and ring-porous (Quercus petraea). Transfers of C from plants to bulk and rhizosphere soil were also evaluated. Clipped birch and oak trees shifted their C-allocation patterns above-ground as a means to recover from defoliation. However, such increased allocation to current-year stems and leaves did not entail reductions in the allocation to the rhizosphere, which remained unchanged between clipped and control trees of both species. B. pubescens and Q. petraea showed differences in their vulnerability and recovery strategies to clipping, the ring-porous species being less affected in terms of growth and architecture to clipping than the diffuse-porous. These contrasting patterns could be partly explained by differences in their C cycling after clipping. Defoliated oaks showed a faster recovery of their canopy biomass, which was supported by increased allocation of recently fixed C, but associated with large decreases in the fine root biomass of clipped trees of this species. Following clipping, both species recovered NSC pools to a larger extent than growth, but the allocation of 13C-labelled photo-assimilates into storage compounds was not increased as compared to controls. Despite their different response to clipping, our results indicate no preventative allocation into storage occurred during the first year after clipping in any of the two studied tree species.

Matèries

Creixement (Plantes), Carbó vegetal

Matèries (anglès)

Growth (Plants), Charcoal

Citació

Col·leccions

Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

Citació

PALACIO BLASCO, Sara, PATERSON, Eric, HESTER, Alison, NOGUÉS MESTRES, Salvador, LINO VILLANUEVA, Gladys liliana, ANADON ROSELL, Alba, MAESTRO, Melchor, MILLARD, Peter. No preferential C-allocation to storage over growth in clipped birch and oak saplings. _Tree Physiology_. 2019. Vol. 40. [consulta: 28 de gener de 2026]. ISSN: 0829-318X. [Disponible a: https://hdl.handle.net/2445/157840]

Exportar metadades

JSON - METS

Compartir registre