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Sensibilidade de hortaliças (Lactuca sativa L. e Eruca sativa Mill.) à exposição de extratos brutos de cianobactéria tóxica e não tóxica

dc.contributor.authorBittencourt-Oliveira, M. C. [UNESP]
dc.contributor.authorHereman, T. C. [UNESP]
dc.contributor.authorMacedo-Silva, I. [UNESP]
dc.contributor.authorCordeiro-Araújo, M. K.
dc.contributor.authorSasaki, F. F.C.
dc.contributor.authorDias, C. T.S.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal Rural de Pernambuco - UFRPE
dc.date.accessioned2018-12-11T16:38:46Z
dc.date.available2018-12-11T16:38:46Z
dc.date.issued2015-01-01
dc.description.abstractWe evaluated the effect of crude extracts of the microcystin-producing (MC+) cyanobacteria Microcystis aeruginosa on seed germination and initial development of lettuce and arugula, at concentrations between 0.5 μg.L<sup>–1</sup> and 100 μg.L<sup>–1</sup> of MC-LR equivalent, and compared it to crude extracts of the same species without the toxin (MC–). Crude extracts of the cyanobacteria with MC (+) and without MC (–) caused different effects on seed germination and initial development of the salad green seedlings, lettuce being more sensitive to both extracts when compared to arugula. Crude extracts of M. aeruginosa (MC+) caused more evident effects on seed germination and initial development of both species of salad greens than MC–. Concentrations of 75 μg.L<sup>–1</sup> and 100 μg.L<sup>–1</sup> of MC–LR equivalent induced a greater occurrence of abnormal seedlings in lettuce, due to necrosis of the radicle and shortening of this organ in normal seedlings, as well as the reduction in total chlorophyll content and increase in the activity of the antioxidant enzyme peroxidase (POD). The MC– extract caused no harmful effects to seed germination and initial development of seedlings of arugula. However, in lettuce, it caused elevation of POD enzyme activity, decrease in seed germination at concentrations of 75 μg.L<sup>–1</sup> (MC-75) and 100 μg.L<sup>–1</sup> (MC-100), and shortening of the radicle length, suggesting that other compounds present in the cyanobacteria extracts contributed to this result. Crude extracts of M. aeruginosa (MC–) may contain other compounds, besides the cyanotoxins, capable of causing inhibitory or stimulatory effects on seed germination and initial development of salad green seedlings. Arugula was more sensitive to the crude extracts of M. aeruginosa (MC+) and (MC–) and to other possible compounds produced by the cyanobacteria.en
dc.description.affiliationDepartment of Biological Sciences, Luiz de Queiroz College of Agriculture, Universidade de São Paulo – USP, Av. Pádua Dias, 11, São Dimas
dc.description.affiliationUniversidade Estadual Paulista ‘Júlio de Mesquita Filho’ - UNESP, Av. 24-A, 1515
dc.description.affiliationUniversidade Federal Rural de Pernambuco - UFRPE, Rua D. Manoel de Medeiros, S/N
dc.description.affiliationDepartment of Exact Sciences, Luiz de Queiroz College of Agriculture, Universidade de São Paulo – USP, Av. Pádua Dias, 11, São Dimas
dc.description.affiliationUnespUniversidade Estadual Paulista ‘Júlio de Mesquita Filho’ - UNESP, Av. 24-A, 1515
dc.format.extent273-278
dc.identifierhttp://dx.doi.org/10.1590/1519-6984.08113
dc.identifier.citationBrazilian Journal of Biology, v. 75, n. 2, p. 273-278, 2015.
dc.identifier.doi10.1590/1519-6984.08113
dc.identifier.fileS1519-69842015000200004.pdf
dc.identifier.issn1678-4375
dc.identifier.issn1519-6984
dc.identifier.scieloS1519-69842015000200004
dc.identifier.scopus2-s2.0-84936764627
dc.identifier.urihttp://hdl.handle.net/11449/167893
dc.language.isoeng
dc.relation.ispartofBrazilian Journal of Biology
dc.relation.ispartofsjr0,523
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectIrrigation
dc.subjectMicrocystin
dc.subjectProductivity
dc.subjectSalad greens
dc.titleSensibilidade de hortaliças (Lactuca sativa L. e Eruca sativa Mill.) à exposição de extratos brutos de cianobactéria tóxica e não tóxicapt
dc.title.alternativeSensitivity of salad greens (Lactuca sativa L. and Eruca sativa Mill.) exposed to crude extracts of toxic and non-toxic cyanobacteriaen
dc.typeArtigo
dspace.entity.typePublication

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