Glyphosate resistance in amaranthus viridis in brazilian citrus orchards

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Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorInstituto Agronômico de Campinas (IAC)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorAlcántara-De la Cruz, Ricardo-
Autor(es): dc.creatorAmaral, Gabriel da Silva-
Autor(es): dc.creatorde Oliveira, Guilherme Moraes-
Autor(es): dc.creatorRufino, Luiz Renato-
Autor(es): dc.creatorde Azevedo, Fernando Alves-
Autor(es): dc.creatorde Carvalho, Leonardo Bianco [UNESP]-
Autor(es): dc.creatorda Silva, Maria Fátima Das Graças Fernandes-
Data de aceite: dc.date.accessioned2022-02-22T00:26:37Z-
Data de disponibilização: dc.date.available2022-02-22T00:26:37Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3390/agriculture10070304-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199160-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199160-
Descrição: dc.descriptionGlyphosate is the main tool for weed management in Brazilian citrus orchards, where weeds, such as Conyza bonariensis and Digitaria insularis, have been found with resistance to this herbicide. Field prospections have allowed the identification of a possible new case of glyphosate resistance. In this work, the susceptibility levels to glyphosate on three Amaranthus viridis L. populations, with suspected resistance (R1, R2, and R-IAC), collected in citrus orchards from the São Paulo State, Brazil, as well as their accumulation rates of shikimic acid, were determined. The fresh weight of the susceptible population (S) was reduced by 50% (GR50) with ~30 g ea ha−1 glyphosate, while the GR50 values of the R populations were between 5.4 and 11.3 times higher than that for S population. The LD50 (herbicide dose to kill 50% of individuals of a weed population) values of the S population were ≤150 g ea ha−1 glyphosate, while the LD50 of the R populations ranged from 600 to 920 g ea ha−1 . Based on the reduction of fresh weight and the survival rate, the R1 population showed the highest level of glyphosate resistance, which had GR50 and LD50 values of 248 and 918 g ea ha−1 glyphosate, respectively. The S population accumulated 240 µg shikimic acid at 1000 µM glyphosate, while the R1, R2, and R-IAC populations accumulated only 16, 43, and 33 µg shikimic acid, respectively (between 5.6 to 15 times less than the S population). Enzyme activity assays suggested that at least one target site-type mechanism was involved in resistance. This result revealed the first report of glyphosate resistance in A. viridis reported in the world.-
Descrição: dc.descriptionDepartamento de Química Universidade Federal de São Carlos-
Descrição: dc.descriptionCentro de Ciências Biológicas e da Saúde Universidade Federal de São Carlos-
Descrição: dc.descriptionCentro de Ciências Agrárias Universidade Federal de São Carlos—Campus Araras-
Descrição: dc.descriptionCentro de Citricultura “Sylvio Moreira” Instituto Agronômico de Campinas (IAC)-
Descrição: dc.descriptionSchool of Agricultural and Veterinary Sciences São Paulo State University (UNESP)-
Descrição: dc.descriptionSchool of Agricultural and Veterinary Sciences São Paulo State University (UNESP)-
Formato: dc.format1-10-
Idioma: dc.languageen-
Relação: dc.relationAgriculture (Switzerland)-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDose-response-
Palavras-chave: dc.subjectEnzyme activity-
Palavras-chave: dc.subjectHerbicide resistance-
Palavras-chave: dc.subjectShikimic acid-
Palavras-chave: dc.subjectSlender amaranth-
Título: dc.titleGlyphosate resistance in amaranthus viridis in brazilian citrus orchards-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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