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Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions

2018Journal article Open access
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dc.contributor.authorGouveia, Carla S.S.
dc.contributor.authorGanança, José F.T.
dc.contributor.authorLebot, Vincent
dc.contributor.authorCarvalho, Miguel Â. A. Pinheiro de
dc.date.accessioned2021-03-04T19:16:24Z
dc.date.available2021-03-04T19:16:24Z
dc.date.issued2018
dc.description.abstractOxalate (calcium oxalate) accumulation in taro plants (Colocasia esculenta (L.) Schott) impacts their nutritional quality, producing acridity, causing lips, mouth and throat tissues swelling if consumed fresh. The oxalate content is related to photosynthesis, through the glycolate–glyoxylate oxidation pathway. The plant’s photosynthetic rate usually increases in non-stressed conditions. Differences in photosynthetic rate are indirectly related to the chlorophyll content index. Protein accumulation and starch variation are also important traits to understand the taro oxalate synthesis caused by drought and how they affect corm quality. The purpose of this study was to quantitate oxalates in taro corms and shoots submitted to drought conditions and to evaluate how stress response can affect the nutritional quality of taro whole-plant. Seven taro genotypes from Madeira, Canaries and Pacific Community (SPC) collections were grown in greenhouse conditions and submitted to different watering regimes for drought tolerance screening. Corms and shoots were harvested and evaluated for oxalates (soluble, insoluble and total), chlorophyll content index (CCI), crude protein, starch, starch solubility in water and starch swelling power. All accessions had very high calcium oxalate content. Drought-tolerant genotypes showed good osmotic response by oxalate precipitation and mobilization through shoot to corm tissues, photosynthesis adaptation by increase of CCI, protein accumulation, and very low starch hydrolysis. Sensitive-drought genotypes showed less mobilization of calcium oxalate, decreased photosynthetic rate and protein synthesis, and slight increase of starch hydrolysis. Variation in taro oxalate content is consistent and significantly correlated with the photosynthetic rate, carbohydrate metabolism and protein synthesis.pt_PT
dc.description.sponsorshipThe authors acknowledge the Programa Operacional da Região Autónoma da Madeira—PO Madeira 14–20 (grant number M1420-01-0145-FEDER-000011, CASBio). The first author wishes to acknowledge the Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI) for the financial support 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., Lebot, V., & de Carvalho, M. Â. P. (2018). Quantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditions. Acta Physiologiae Plantarum, 40(12), 1-11. https://doi.org/10.1007/s11738-018-2784-7pt_PT
dc.identifier.doi10.1007/s11738-018-2784-7pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3150
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectCarbohydrate metabolismpt_PT
dc.subjectChlorophyll content indexpt_PT
dc.subjectColocasia esculenta (L.) Schottpt_PT
dc.subjectDrought tolerancept_PT
dc.subjectPhotosynthesispt_PT
dc.subjectSoluble and insoluble oxalatespt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleQuantitation of oxalates in corms and shoots of Colocasia esculenta (L.) Schott under drought conditionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue12pt_PT
oaire.citation.titleActa Physiologiae Plantarumpt_PT
oaire.citation.volume40pt_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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relation.isAuthorOfPublication.latestForDiscovery0d114ba6-d4cd-4e86-850e-78b1ed354917

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