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Phenotypic flexibility and drought avoidance in taro (Colocasia esculenta (L.) Schott)

2020Journal article Open access
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dc.contributor.authorGouveia, Carla S. S.
dc.contributor.authorGanança, José F. T.
dc.contributor.authorNóbrega, Humberto G. M.
dc.contributor.authorFreitas, José G. R. de
dc.contributor.authorLebot, Vincent
dc.contributor.authorCarvalho, Miguel Â. A. Pinheiro de
dc.date.accessioned2020-07-13T08:43:09Z
dc.date.available2020-07-13T08:43:09Z
dc.date.issued2020
dc.description.abstractTaro (Colocasia esculenta (L.) Schott) is a substantial staple food in most of the tropical regions. Prolonged exposure to drought impairs crop production worldwide. Tolerant crops have the best capability to cope and avoid drought, through phenotypic flexibility mechanisms. The water use efficiency (WUE) is well known in taro crops, but very scarce information is available relating to their nutrient efficiency (NER) in drought conditions. Our work provided pertinent information about the physiological variation of seven taro accessions subjected to seven months of drought, by recording the differences for nutrient allocation, chlorophyll canopy, biomass loss, and stress intensity. Significant relationships between control and drought treatments on WUE (+85%), total plant biomass (TPB, -26.8%), chlorophyll content index (CCI, +1.8%), and nutrient harvest index (NHI, +0.2%) were detected. Drought led to a generalized loss of TPB as drought avoidance strategy, although distinct phenotypic flexibility was observed through the root: shoot ratio (R:S) and stress index (SI) from the corm and shoot organs. The nutrient allocation from the corms to shoots, with NER increase registered in drought conditions, can be a valuable tool to complement the TPB and WUE productivity traits, to be used in taro breeding programs.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGouveia, C. S. S., Ganança, J. F. T., Nóbrega, H. G. M. de, Freitas, J. G. R. de, Lebot, V., & de Carvalho, M. Â. A. P. (2020, March 5). Phenotypic flexibility and drought avoidance in taro (Colocasia esculenta (L.) Schott). Emirates Journal of Food and Agriculture, 32(2), 150-159. doi:10.9755/ejfa.2020.v32.i2.2075pt_PT
dc.identifier.doi10.9755/ejfa.2020.v32.i2.2075pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/2846
dc.language.isoengpt_PT
dc.publisherEmirates Journal of Food and Agriculturept_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBiomasspt_PT
dc.subjectDroughtpt_PT
dc.subjectNutrient efficiencypt_PT
dc.subjectRootpt_PT
dc.subjectShoot ratiopt_PT
dc.subjectStress indexpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.subjectEscola Superior de Tecnologias e Gestãopt_PT
dc.titlePhenotypic flexibility and drought avoidance in taro (Colocasia esculenta (L.) Schott)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage159pt_PT
oaire.citation.startPage150pt_PT
oaire.citation.titleEmirates Journal of Food and Agriculturept_PT
person.familyNameGouveia
person.familyNameGanança
person.familyNameNóbrega
person.familyNameLebot
person.familyNameAlmeida Pinheiro de Carvalho
person.givenNameCarla
person.givenNameJosé Filipe
person.givenNameHumberto
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.orcid0000-0001-8900-9340
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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