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Foliar application of melatonin to mitigate olive tree summer stress

2017Conference object Open access
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dc.contributor.authorGonçalves, Alexandre
dc.contributor.authorSilva, Ermelinda
dc.contributor.authorMartins, Sandra
dc.contributor.authorBrito, Cátia
dc.contributor.authorPinto, Luís
dc.contributor.authorRocha, Luís
dc.contributor.authorPavia, Ivo
dc.contributor.authorLuzio, Ana
dc.contributor.authorDinis, Lia Tânia
dc.contributor.authorRodrigues, M.A.
dc.contributor.authorMoutinho-Pereira, José
dc.contributor.authorCorreia, Carlos M.
dc.date.accessioned2018-02-20T17:53:25Z
dc.date.available2018-02-20T17:53:25Z
dc.date.issued2017
dc.description.abstractOlive crop is widely distributed in the Mediterranean region and has a distinct socioeconomic importance in Portugal, namely in the Northeast region, where mostly rainfed olive orchards cover over 75000 ha and comprise approximately 36000 producers. The projected climate change characterized by severe summer conditions, with low rainfall, excessive heat load and high irradiance levels might affect this crop, notwithstanding the defense strategies that olive trees dispose against summer stress. In this work we aimed to investigate a new cropping practice with the introduction of a foliar application of melatonin (Nacetyl- 5-methoxytryptamine; 100 ~M) that have shown a central role in stress tolerance in different plant species. The study was conducted in an organic orchard of seven-years-old at Quinta do Prado, Lodoes, Vila Flor (41°20'13.3"N, 7"05'54.2"W), Portugal, and shows the impact on leaf gas exchange, chlorophyll a fluorescence, relative water content, concentration of photosynthetic pigments and fruits total phenolic content at 6 different times between July and October 2016. Melatonin sprayed plants consistently showed higher stomatal conductance (18-73% during morning measurements and 11-136% at midday), net photosynthesis (25-81% morning and 32-130% at midday), electron transport rate (12-23% morning and 0.1-13% at midday) and photochemical yield of photosystem 11 (12-24% morning and 0-13% at midday). The better physiological status of the melatonin sprayed olive trees was reflected in a decrease in fruits total phenolic content (21%). The results suggest that the foliar application of melatonin boost the physiological activity of olive trees, giving new insights about the effect of this new cropping practice in olive orchards. Future studies to optimize the concentration and the number of applications of this metabolite must be pursued in order to get a better performance of olive tree under the harsh climatic conditions projected for the Mediterranean region.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGonçalves, Alexandre; Silva, Ermelinda; Martins, Sandra; Brito, Cátia; Pinto, Luís; Rocha, Luís; Pavia, Ivo; Luzio, A.; Dinis, L.; Rodrigues, M.A.; Moutinho-Pereira, José; Correia, Carlos (2017). Foliar application of melatonin to mitigate olive tree summer stress. In XXII Reunión de la Sociedad Espanola de Fisología Vegetal/XV Spanish Portuguese Congress of Plant Physiology. Barcelonapt_PT
dc.identifier.urihttp://hdl.handle.net/10198/15860
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociedad Espanola de Fisología Vegetalpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMelatoninpt_PT
dc.subjectOlive treept_PT
dc.subjectSummer stresspt_PT
dc.titleFoliar application of melatonin to mitigate olive tree summer stresspt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceBarcelonapt_PT
oaire.citation.endPage132pt_PT
oaire.citation.startPage132pt_PT
oaire.citation.titleXXII Reunión de la Sociedad Espanola de Fisología Vegetal/XV Spanish Portuguese Congress of Plant Physiologypt_PT
person.familyNameRodrigues
person.givenNameManuel
person.identifier.ciencia-id371D-DF0D-8D68
person.identifier.orcid0000-0002-5367-1129
person.identifier.ridO-1721-2016
person.identifier.scopus-author-id35270106800
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication43621353-fa11-4559-9b24-27eba5ad3de0
relation.isAuthorOfPublication.latestForDiscovery43621353-fa11-4559-9b24-27eba5ad3de0

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