Does Sourgrass leaf anatomy influence glyphosate resistance?

Barroso, Arthur Arrobas Martins; Galeano, Esteban; Albrecht, Alfredo Junior Paiola; dos Reis, Fabrícia Cristina; Victoria Filho, Ricardo

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dc.creator	Barroso, Arthur Arrobas Martins
dc.creator	Galeano, Esteban
dc.creator	Albrecht, Alfredo Junior Paiola
dc.creator	dos Reis, Fabrícia Cristina
dc.creator	Victoria Filho, Ricardo
dc.date	2015-12-29
dc.date.accessioned	2022-03-21T20:07:48Z
dc.date.available	2022-03-21T20:07:48Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/1124
dc.identifier	10.14295/cs.v6i4.1124
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/77769
dc.description	Sourgrass(Digitaria insularis, L. Mez ex Ekman)is a weed that requires high rates of glyphosate ((N-[phosphonomethyl]-glycine) forcontrol, verylittle of the herbicide applied isabsorbed by theleaves. Morphological and histological differences in leaves of glyphosate-resistant and glyphosate-susceptible plantsshould explain the contrast of variance between herbicide susceptibility. Leaves of different growth andphenological stages were collected and submitted to histological andelectron microscopy scanning analysis. Those plants were also submitted to a glyphosate dose-response curve analysis. The results suggest thatbiotypes exhibits differences infoliar structures that can influence the uptake and translocation of glyphosate. A thinparenchyma, lesser distance amongvascular bundles, and higher phloem sizewere found in resistant biotypes (differences close to 10%). Minor stomata number and higher epicuticular waxy deposition in stomata and leaf surface were found in resistant plants when leaves came from regrowth, leading to a possiblelesser herbicide absorption. Resistant plants showed absence of trichomes in late stages of development (64% less trichomes than susceptible plants). The higher concentration of trichomes in susceptible plants can be an absorption pathfor glyphosate getthrough the cuticle.	en-US
dc.description	Sourgrass(Digitaria insularis, L. Mez ex Ekman)is a weed that requires high rates of glyphosate ((N-[phosphonomethyl]-glycine) forcontrol, verylittle of the herbicide applied isabsorbed by theleaves. Morphological and histological differences in leaves of glyphosate-resistant and glyphosate-susceptible plantsshould explain the contrast of variance between herbicide susceptibility. Leaves of different growth andphenological stages were collected and submitted to histological andelectron microscopy scanning analysis. Those plants were also submitted to a glyphosate dose-response curve analysis. The results suggest thatbiotypes exhibits differences infoliar structures that can influence the uptake and translocation of glyphosate. A thinparenchyma, lesser distance amongvascular bundles, and higher phloem sizewere found in resistant biotypes (differences close to 10%). Minor stomata number and higher epicuticular waxy deposition in stomata and leaf surface were found in resistant plants when leaves came from regrowth, leading to a possiblelesser herbicide absorption. Resistant plants showed absence of trichomes in late stages of development (64% less trichomes than susceptible plants). The higher concentration of trichomes in susceptible plants can be an absorption pathfor glyphosate getthrough the cuticle.	pt-BR
dc.format	application/pdf
dc.language	eng
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/1124/364
dc.rights	Copyright (c) 2016 Arthur Arrobas Martins Barroso, Esteban Galeano, Alfredo Junior Paiola Albrecht, Fabrícia Cristina dos Reis, Ricardo Victoria Filho	en-US
dc.source	Comunicata Scientiae; Vol. 6 No. 4 (2015); 445-453	en-US
dc.source	Comunicata Scientiae; v. 6 n. 4 (2015); 445-453	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.subject	Herbicide resistance	en-US
dc.subject	absorption	en-US
dc.subject	trichomes	en-US
dc.subject	parenchyma	en-US
dc.title	Does Sourgrass leaf anatomy influence glyphosate resistance?	en-US
dc.title	Does Sourgrass leaf anatomy influence glyphosate resistance?	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	Absorption, herbicide resistance, parenchyma,trichomes	pt-BR