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Changes in oxalate composition and other nutritive traits in root tubers and shoots of sweet potato (Ipomoea batatasL. [Lam.]) under water stress

2019Journal 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.
dc.date.accessioned2021-02-25T15:03:04Z
dc.date.available2021-02-25T15:03:04Z
dc.date.issued2019
dc.description.abstractBACKGROUND: The presence of insoluble calcium oxalate druse crystals (CaOx) in sweet potato (Ipomoea batatas) can negatively affect its nutritional quality. Photosynthesis, starch, and protein composition are linked with oxalate synthesis and tuber quality under water scarcity. Our main objective was the oxalate quantitation of sweet potato tubers and shoots and also to assess how drought changes their nutritional value. Eight sweet potato accessions from Madeira, the Canaries and Guinea-Bissau were analyzed for their response to drought stress. Tubers and shoots were analyzed for total (T-Ox), soluble (S-Ox) and insoluble (CaOx) oxalates, protein, chlorophyll content index (CCI), soluble starch, starch swelling power, and starch solubility in water. RESULTS: The S-Ox and CaOx content was higher in shoots. Six accessions were above maximum CaOx levels for raw consumption. Accessions with more favorable responses to drought had decreased CaOx with S-Ox increase content for osmoregulation. They also presented slightly decreased CCI and protein contents. These accessions also had an increased shoot starch content, for further tuber storage starch hydrolysis, and maintained the quality and functional properties of the tuber starch grain. Those with a less favorable response to drought had a higher T-Ox and CaOx content in both organs, hindering water absorption. They also had decreased protein and CCI, with a slight increase in tuber starch hydrolysis. CONCLUSION: Oxalate content was significantly related to carbohydrate metabolism, CCI, and protein synthesis. This study significantly contributed to the screening of the sweet potato stress response to drought, to adapt this crop to climatic change through breeding programs.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGouveia, C. S., Ganança, J. F., Lebot, V., & Carvalho, Miguel Â. A. Pinheiro de (2020). Changes in oxalate composition and other nutritive traits in root tubers and shoots of sweet potato (Ipomoea batatas L.[Lam.]) under water stress. Journal of the Science of Food and Agriculture, 100(4), 1702-1710. DOI 10.1002/jsfa.10185pt_PT
dc.identifier.doi10.1002/jsfa.10185pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3137
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociety of Chemical Industrypt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectChlorophyll content indexpt_PT
dc.subjectDroughtpt_PT
dc.subjectIpomoea batataspt_PT
dc.subjectProteinpt_PT
dc.subjectSoluble and insoluble oxalatespt_PT
dc.subjectStarchpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleChanges in oxalate composition and other nutritive traits in root tubers and shoots of sweet potato (Ipomoea batatasL. [Lam.]) under water stresspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1710pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage1702pt_PT
oaire.citation.titleJournal of the Science of Food and Agriculturept_PT
oaire.citation.volume100pt_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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