Hydraulic and photosynthetic limitations prevail over root nonstructural carbohydrate reserves as drivers of resprouting in two Mediterranean oaks
Loading...
Date
2020
Authors
Risco de Dios, VictorArteaga, Carles
Peguero Pina, José Javier
Sancho Knapik, Domingo
Qin, Haiyan
Zveushe, Obey K.
Sun, Wei
Williams, David G.
Boer, Matthias M.
Voltas, Jordi
Moreno, José M.
Tissue, David T.
Gil Pelegrín, Eustaquio
Journal Title
Journal ISSN
Volume Title
Publisher
Typology
Journal ContributionArticle
Abstract
Resprouting is an ancestral trait in angiosperms that confers resilience after perturbations.
As climate change increases stress, resprouting vigor is declining in many forest regions, but the underlying mechanism is poorly understood. Resprouting in woody plants is thought to be primarily limited by the availability of non-structural carbohydrate reserves (NSC), but hydraulic limitations could also be important. We conducted
a multifactorial experiment with two levels of light (ambient, 2–3% of
ambient) and three levels of water stress (0, 50 and 80 percent losses of hydraulic conductivity, PLC) on two Mediterranean oaks (Quercus ilex and Q. faginea) under a rain-out shelter (n = 360). The proportion of resprouting individuals after canopy clipping declined markedly as PLC increased for both species. NSC concentrations affected the response of Q. ilex, the species with higher leaf construction costs, and its effect depended on the PLC. The growth of resprouting individuals was largely dependent on photosynthetic rates for both species, while stored NSC availability and hydraulic limitations played minor and non-significant roles, respectively. Contrary to conventional wisdom, our results indicate that resprouting in oaks may be primarily driven by complex interactions between hydraulics and carbon sources, whereas stored NSC play a significant but secondary role.
Description
Keywords
Bibliographic citation
Resco de Dios V, Arteaga C, Peguero-
Pina JJ, et al. Hydraulic and photosynthetic limitations prevail
over root non-structural carbohydrate reserves as drivers of
resprouting in two Mediterranean oaks. Plant Cell Environ.
2020;43:1944–1957. https://doi.org/10.1111/pce.13781
AGROVOC subjects
CarbohidratosFotosíntesis
Rebrote
Estrés hídrico
Quercus ilex
Conductividad hidráulica
Sponsorship
Generalitat de Catalunya, Grant/Award
Number: SGR2017-1518; Instituto Nacional de
Investigación y Tecnología Agraria y
Alimentaria, Spain, Grant/Award Number:
RTA2015-00054-C02-01; Ministerio de
Ciencia e Innovación, Grant/Award Number:
AGL2015-69151-R; Natural National Science
Foundation of China, Grant/Award Number:
31850410483; the talent funds of Southwest
University of Science and Technology, Grant/
Award Number: 18ZX7131