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Leaf-to-branch scaling of C-gain in field-grown almond trees under different soil moisture regimes
dc.creator | Egea Cegarra, Gregorio | es |
dc.creator | González Real, María M. | es |
dc.creator | Martín Gorriz, Bernardo | es |
dc.creator | Baille, Alain | es |
dc.date.accessioned | 2018-05-14T09:35:44Z | |
dc.date.available | 2018-05-14T09:35:44Z | |
dc.date.issued | 2014-06-26 | |
dc.identifier.citation | Egea Cegarra, G., González Real, M.M., Martín Gorriz, B. y Baille, A. (2014). Leaf-to-branch scaling of C-gain in field-grown almond trees under different soil moisture regimes. Tree Physiology, 34 (6), 619 p.-629 p.. | |
dc.identifier.issn | 0829-318X | es |
dc.identifier.issn | e 1758-4469 | es |
dc.identifier.uri | https://hdl.handle.net/11441/74558 | |
dc.description.abstract | Branch/tree-level measurements of carbon (C)-acquisition provide an integration of the physical and biological processes driving the C gain of all individual leaves. Most research dealing with the interacting effects of high-irradiance environments and soil-induced water stress on the C-gain of fruit tree species has focused on leaf-level measurements. The C-gain of both sun-exposed leaves and branches of adult almond trees growing in a semi-arid climate was investigated to determine the respective costs of structural and biochemical/physiological protective mechanisms involved in the behaviour at branch scale. Measurements were performed on well-watered (fully irrigated, FI) and drought-stressed (deficit irrigated, DI) trees. Leaf-to-branch scaling for net CO2 assimilation was quantified by a global scaling factor (fg), defined as the product of two specific scaling factors: (i) a structural scaling factor (fs), determined under well-watered conditions, mainly involving leaf mutual shading; and (ii) a water stress scaling factor (fws,b) involving the limitations in C-acquisition due to soil water deficit. The contribution of structural mechanisms to limiting branch net C-gain was high (mean fs ∼0.33) and close to the projected-to-total leaf area ratio of almond branches (ε = 0.31), while the contribution of water stress mechanisms was moderate (mean fws,b ∼0.85), thus supplying an fg ranging between 0.25 and 0.33 with slightly higher values for FI trees with respect to DI trees. These results suggest that the almond tree (a drought-tolerant species) has acquired mechanisms of defensive strategy (survival) mainly based on a specific branch architectural design. This strategy allows the potential for C-gain to be preserved at branch scale under a large range of soil water deficits. In other words, almond tree branches exhibit an architecture that is suboptimal for C-acquisition under well-watered conditions, but remarkably efficient to counteract the impact of DI and drought events. | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Oxford University Press | es |
dc.relation.ispartof | Tree Physiology, 34 (6), 619 p.-629 p.. | |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Estados Unidos de América | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Scaling | es |
dc.subject | Leaf-to-branch | es |
dc.subject | Almond trees | es |
dc.subject | Soil moisture | es |
dc.title | Leaf-to-branch scaling of C-gain in field-grown almond trees under different soil moisture regimes | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos | |
dc.relation.publisherversion | https://academic.oup.com/treephys/article/34/6/619/2338119# | es |
dc.identifier.doi | 10.1093/treephys/tpu045 | es |
idus.format.extent | 11 p. | es |
dc.journaltitle | Tree Physiology | es |
dc.publication.volumen | 34 | es |
dc.publication.issue | 6 | es |
dc.publication.initialPage | 619 p. | es |
dc.publication.endPage | 629 p. | es |
dc.identifier.sisius | 19490 | es |
Ficheros | Tamaño | Formato | Ver | Descripción |
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tpu045.pdf | 1.788Mb | ![]() | Ver/ | |