Physiological, biochemical, and ultrastructural characterization of selenium toxicity in cowpea plants

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dc.contributor.authorSilva, Vinícius Martins [UNESP]
dc.contributor.authorBoleta, Eduardo Henrique Marcandalli [UNESP]
dc.contributor.authorLanza, Maria Gabriela Dantas Bereta [UNESP]
dc.contributor.authorLavres, Jose
dc.contributor.authorMartins, Juliana Trindade [UNESP]
dc.contributor.authorSantos, Elcio Ferreira
dc.contributor.authordos Santos, Flávia Lourenço Mendes [UNESP]
dc.contributor.authorPutti, Fernando Ferrari [UNESP]
dc.contributor.authorJunior, Enes Furlani [UNESP]
dc.contributor.authorWhite, Philip J.
dc.contributor.authorBroadley, Martin R.
dc.contributor.authorCarvalho, Hudson Wallace Pereira de
dc.contributor.authorReis, André Rodrigues dos [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionThe James Hutton Institute
dc.contributor.institutionThe University of Nottingham
dc.date.accessioned2018-12-11T17:18:36Z
dc.date.available2018-12-11T17:18:36Z
dc.date.issued2018-06-01
dc.description.abstractSelenium (Se) is considered a beneficial element for plants; however, in high concentrations, it causes negative effects on plant physiology and development. This study reports the first physiological, nutritional, and ultrastructural description of Se toxicity in cowpea growing under field conditions. Selenium was supplied as a foliar application of sodium selenite at varying concentrations (0, 50, 100, 200, 400, 800, 1200, and 1600 g ha−1). An increased yield was observed with the application of 50 g ha−1 Se. Application of concentrations higher than 50 g ha−1 caused leaf toxicity. Increased lipid peroxidation and hydrogen peroxide concentration and reduced total sugars, sucrose, and carotenoid concentration were observed at highest doses tested (1200 and 1600 g ha−1). Applications of more than 50 g ha−1 Se reduced the phloem diameter, caused chlorosis of the leaf blade with a coalescence of lesions, and caused pink salt deposits to appear. Lesions were observed mainly near the trichomes on the adaxial surface of the leaf blade. An analysis of the element distribution with microprobe X-ray fluorescence spectrometry (μ-XRF) revealed accumulation of Se, calcium (Ca), potassium (K), copper (Cu), and manganese (Mn) near the primary vein and in the necrotic brown areas of the leaf lesions. In contrast, Na was homogeneously distributed in the leaf tissue.en
dc.description.affiliationSão Paulo State University – UNESP, Ilha Solteira, Postal Code 15.385-000
dc.description.affiliationSão Paulo State University – UNESP, Tupã Postal Code 17602-496, SP
dc.description.affiliationUniversity of São Paulo – USP, Postal Code 13416-000, SP
dc.description.affiliationThe James Hutton Institute, Invergowrie
dc.description.affiliationSchool of Biosciences The University of Nottingham, Sutton Bonington
dc.description.affiliationUnespSão Paulo State University – UNESP, Ilha Solteira, Postal Code 15.385-000
dc.description.affiliationUnespSão Paulo State University – UNESP, Tupã Postal Code 17602-496, SP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2015/19121-8
dc.description.sponsorshipIdFAPESP: 2016/19773-8
dc.format.extent172-182
dc.identifierhttp://dx.doi.org/10.1016/j.envexpbot.2018.03.020
dc.identifier.citationEnvironmental and Experimental Botany, v. 150, p. 172-182.
dc.identifier.doi10.1016/j.envexpbot.2018.03.020
dc.identifier.file2-s2.0-85044151818.pdf
dc.identifier.issn0098-8472
dc.identifier.scopus2-s2.0-85044151818
dc.identifier.urihttp://hdl.handle.net/11449/176025
dc.language.isoeng
dc.relation.ispartofEnvironmental and Experimental Botany
dc.relation.ispartofsjr1,376
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAntioxidant metabolism
dc.subjectPhotosynthetic pigments
dc.subjectScanning electron microscopy
dc.subjectToxicity
dc.subjectVigna unguiculata
dc.titlePhysiological, biochemical, and ultrastructural characterization of selenium toxicity in cowpea plantsen
dc.typeArtigo
unesp.author.lattes3951143759106367[13]
unesp.author.orcid0000-0002-6527-2520[13]

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