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Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott)

2019Journal article Open access
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dc.contributor.authorGouveia, Carla S.S.
dc.contributor.authorGanança, José F.T.
dc.contributor.authorSlaski, Jan
dc.contributor.authorLebot, Vincent
dc.contributor.authorCarvalho, Miguel Â.A. Pinheiro de
dc.date.accessioned2021-03-05T11:27:22Z
dc.date.available2021-03-05T11:27:22Z
dc.date.issued2019
dc.description.abstractTaro (Colocasia esculenta L. Schott) is an important staple food crop in tropical and developing countries, having high water requirements. The purpose of this study was to evaluate the feasibility of using carbon and nitrogen isotopic composition (δ13C and δ15N) as a physiological indicator of taro response to drought, and elucidation of the relationship between the water use efficiency (WUE) under drought conditions and carbon isotope discrimination (Δ13C). As an alternative to WUE determination, obtained by measuring plant growth and water loss during an entire vegetative cycle, we have used Δ13C to determine the tolerance of C3 taro plants to drought. Seven taro accessions from Madeira, Canary Islands and the Secretariat of the Pacific Community (Fiji) collections were grown under greenhouse conditions and subjected to different watering regimes during a one-year cycle. Total plant biomass (TPB), WUE and δ15N were determined at the whole-plant level (WP). Corms and shoots were evaluated separately for nitrogen content (N), δ13C, Δ13C and δ15N. WUE showed positive correlation with TPB (r = 0.4) and negative with Δ13C (r = -0.3); Corm δ15N showed positive correlations with WP δ15N (r = 0.6) and corm N (r = 0.3). Accordingly, the taro plants with enhanced WUE exhibited low Δ13C and δ15N values as a physiological response to drought stress. The approach used in the present study has developed new tools that could be used in further research on taro response to environmental stresses.pt_PT
dc.description.sponsorshipThis work was supported by the Programa Operacional da Região Autónoma da Madeira – PO Madeira 14–20 [grant number M1420-01- 0145-FEDER-000011, CASBio] and the Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação – ARDITI [grant number M1420-09-5369-FSE-000001].pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGouveia, C. S., Ganança, J. F., Slaski, J., Lebot, V., & Carvalho, M. Â. P. (2019). Stable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott). Journal of plant physiology, 232, 100-106. https://doi.org/10.1016/j.jplph.2018.11.024pt_PT
dc.identifier.doi10.1016/j.jplph.2018.11.024pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3152
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectColocasia esculentapt_PT
dc.subjectTaropt_PT
dc.subjectDroughtpt_PT
dc.subjectδ15Npt_PT
dc.subjectΔ13Cpt_PT
dc.subjectWUEpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleStable isotope natural abundances (δ13C and δ15N) and carbon-water relations as drought stress mechanism response of taro (Colocasia esculenta L. Schott)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage106pt_PT
oaire.citation.startPage100pt_PT
oaire.citation.titleJournal of Plant Physiologypt_PT
oaire.citation.volume232pt_PT
person.familyNameGouveia
person.familyNameGanança
person.familyNameLebot
person.familyNameAlmeida Pinheiro de Carvalho
person.givenNameCarla
person.givenNameJosé Filipe
person.givenNameVincent
person.givenNameMiguel Angelo
person.identifier1218558
person.identifier.ciencia-idAE1B-9773-68A8
person.identifier.ciencia-id4610-6741-6816
person.identifier.orcid0000-0001-9309-4613
person.identifier.orcid0000-0002-8384-6188
person.identifier.orcid0000-0001-5699-0566
person.identifier.orcid0000-0002-5084-870X
person.identifier.ridAAH-9928-2020
person.identifier.ridAEE-0913-2022
person.identifier.scopus-author-id55554091900
person.identifier.scopus-author-id8758577600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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