dc.creator | Castillo Segura, Jesús Manuel | es |
dc.creator | Rubio Casal, Alfredo Emilio | es |
dc.creator | Figueroa Clemente, Manuel Enrique | es |
dc.creator | Tye, Alan | es |
dc.date.accessioned | 2017-07-10T08:55:42Z | |
dc.date.available | 2017-07-10T08:55:42Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Castillo Segura, J.M., Rubio Casal, A.E., Figueroa, E. y Tye, A. (2013). Morphological and physiological responses of Galapagos endemic tree Croton scouleri to site conditions varying through its altitudinal range. Dendrobiology, 2013 (69), 41-48. | |
dc.identifier.issn | 1641-1307 | es |
dc.identifier.uri | http://hdl.handle.net/11441/62284 | |
dc.description.abstract | : Galapagos is a natural laboratory offering a great opportunity to study plants functional traits. This
study characterises morphological and ecophysiological responses of Croton scouleri, an endemic tree that habits
from humid and upper elevations to semiarid lowlands, throughout an altitudinal gradient and in a manipulative
experiment. Croton scouleri trees were gradually smaller with less total leaf area due to a gradual reduction
in mean leaf size, and they folded their leaves at lower elevations. These results were also recorded after
cutting every deep root. Two physiological traits that allowed Croton scouleri to avoid damages to the
photosynthetic apparatus were detected between 30 and 150 m a.s.l. Lower variable fluorescence (Fv) and
basal fluorescence (F0) keeping constant maximum photochemical efficiency of PSII (Fv/Fm) denoted a drop
in chlorophyll concentration. Concomitantly, the recorded increase in the Quantum efficiency of PSII ( PSII)
with similar Fv/Fm means that Croton scouleri could be using cyclic electron transport as photoprotective mechanism.
On the other hand, a deep root system to reach the water table allowed Croton scouleri to behave as a
drought-avoider, which was reflected in: (1) unvarying water status Leaf Water Content and Relative Water
Content were always higher than 69 and 58%, respectively; (2) stable and low photoinhibition levels; and (3)
unvarying leaf area index. However, Croton scouleri was not able to avoid drought at altitudes lower 30 m a.s.l.
where similar responses to those recorded after root cutting were recorded. | es |
dc.description.sponsorship | Junta de Andalucía AI60/04 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Polska Akademia Nauk, Instytut Dendrologii | es |
dc.relation.ispartof | Dendrobiology, 2013 (69), 41-48. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | chlorophyll fluorescence | es |
dc.subject | Croton scouleri | es |
dc.subject | leaf area index | es |
dc.subject | photosynthetic stress | es |
dc.subject | water content. | es |
dc.title | Morphological and physiological responses of Galapagos endemic tree Croton scouleri to site conditions varying through its altitudinal range | 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 Biología Vegetal y Ecología | es |
dc.relation.projectID | AI60/04 | es |
dc.relation.publisherversion | http://www.idpan.poznan.pl/dendrobiology/ | es |
dc.identifier.doi | 10.12657/denbio.069.005 | es |
dc.contributor.group | Universidad de Sevilla. RNM224: Ecologia,Citogenetica y Recursos Naturales | es |
idus.format.extent | 8 p. | es |
dc.journaltitle | Dendrobiology | es |
dc.publication.volumen | 2013 | es |
dc.publication.issue | 69 | es |
dc.publication.initialPage | 41 | es |
dc.publication.endPage | 48 | es |
dc.identifier.sisius | 6175 | es |
dc.contributor.funder | Junta de Andalucía | |