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Metabolic responses to water deficit in two Eucalyptus globulus clones with contrasting drought sensitivity

dc.contributor.authorShvaleva, Alla L.
dc.contributor.authorSilva, Filipe Costa e
dc.contributor.authorBreia, Elsa
dc.contributor.authorJouve, Laurent
dc.contributor.authorHausman, Jean-François
dc.contributor.authorAlmeida, Maria Helena
dc.contributor.authorMaroco, João
dc.contributor.authorRodrigues, M. Lucília
dc.contributor.authorPereira, João Santos
dc.contributor.authorChaves, Maria Margarida
dc.date.accessioned2012-09-22T12:44:25Z
dc.date.available2012-09-22T12:44:25Z
dc.date.issued2005
dc.description.abstractWe compared the metabolic responses of leaves and roots of two Eucalyptus globulus Labill. clones differing in drought sensitivity to a slowly imposed water deficit. Responses measured included changes in concentrations of soluble and insoluble sugars, proline, total protein and several antioxidant enzymes. In addition to the general decrease in growth caused by water deficit, we observed a decrease in osmotic potential when drought stress became severe. In both clones, the decrease was greater in roots than in leaves, consistent with the observed increases in concentrations of soluble sugars and proline in these organs. In roots of both clones, glutathione reductase activity increased significantly in response towater deficit, suggesting that this enzyme plays a protective role in roots during drought stress by catalyzing the catabolism of reactive oxygen species. Clone CN5 has stress avoidance mechanisms that account for its lower sensitivity to drought compared with Clone ST51.por
dc.identifier.citationTree Physiology, 26, 239-248por
dc.identifier.issn0829-318X
dc.identifier.urihttp://hdl.handle.net/10400.12/1723
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherOxford University Presspor
dc.subjectAntioxidant enzymespor
dc.subjectOsmotic potentialpor
dc.subjectProlinepor
dc.subjectSugarspor
dc.subjectWater stresspor
dc.titleMetabolic responses to water deficit in two Eucalyptus globulus clones with contrasting drought sensitivitypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceOxfordpor
oaire.citation.endPage248por
oaire.citation.startPage239por
oaire.citation.titleTree Physiologypor
oaire.citation.volume26por
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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