Hormesis effect of 2,4-D choline salt on soybean biometric variables

ABSTRACT Auxin-based herbicides, such as 2,4-dichlorophenoxyacetic acid (2,4-D), are lethal to plants at higher doses, but can enhance plant growth at nontoxic concentrations. The stimulating effect of low doses of a substance considered toxic is known as hormesis. This study used dose-response curv...

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Autores principales:	Pinheiro,Guilherme H.R., Marques,Ricardo F., Araújo,Prissila P.S., Martins,Dagoberto, Marchi,Sidnei R.
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2021
Materias:	2,4-Dichlorophenoxyacetic acid Glycine max low doses morphology synthetic auxin.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000400536
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spelling	oai:scielo:S0718-583920210004005362021-10-27Hormesis effect of 2,4-D choline salt on soybean biometric variablesPinheiro,Guilherme H.R.Marques,Ricardo F.Araújo,Prissila P.S.Martins,DagobertoMarchi,Sidnei R. 2,4-Dichlorophenoxyacetic acid Glycine max low doses morphology synthetic auxin. ABSTRACT Auxin-based herbicides, such as 2,4-dichlorophenoxyacetic acid (2,4-D), are lethal to plants at higher doses, but can enhance plant growth at nontoxic concentrations. The stimulating effect of low doses of a substance considered toxic is known as hormesis. This study used dose-response curves to assess the hormesis effect of low doses of 2,4-D choline salt herbicide on soybean (Glycine max (L.) Merr.) biometric variables with distinct growth habits at different phenological stages. A completely randomized experimental design with seven replicates was used, and the treatments consisted of six fractions of the average dose indicated on the label of 2,4-D choline salt formulation: 0 (control), 0.068, 0.684, 6.84, 68.4 and 684 g ae ha-1 applied at the plant’s phenological stages second node with fully developed leaves (V2) or fifth node with fully developed leaves (V5). The plants were assessed for their main biometric parameters. The results were analyzed by ANOVA and, when significant, the hormesis model was tested. The maximum effect of hormesis on the main biometric parameters of soybean plants was estimated for doses between 0.20 and 36.01 g ae ha-1 of the herbicide and varies depending on the evaluated phenological stage of the plants. Low doses of 2,4-D choline salt herbicide may increase shoots, roots and total DM when applied at stages V2 and V5 of soybean with determinate growth habit and V2 of indeterminate growth habit. There was no adjustment of the hormesis model for the soybean plant with indeterminate growth habit at stage V5.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.81 n.4 20212021-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000400536en10.4067/S0718-58392021000400536
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	2,4-Dichlorophenoxyacetic acid Glycine max low doses morphology synthetic auxin.
spellingShingle	2,4-Dichlorophenoxyacetic acid Glycine max low doses morphology synthetic auxin. Pinheiro,Guilherme H.R. Marques,Ricardo F. Araújo,Prissila P.S. Martins,Dagoberto Marchi,Sidnei R. Hormesis effect of 2,4-D choline salt on soybean biometric variables
description	ABSTRACT Auxin-based herbicides, such as 2,4-dichlorophenoxyacetic acid (2,4-D), are lethal to plants at higher doses, but can enhance plant growth at nontoxic concentrations. The stimulating effect of low doses of a substance considered toxic is known as hormesis. This study used dose-response curves to assess the hormesis effect of low doses of 2,4-D choline salt herbicide on soybean (Glycine max (L.) Merr.) biometric variables with distinct growth habits at different phenological stages. A completely randomized experimental design with seven replicates was used, and the treatments consisted of six fractions of the average dose indicated on the label of 2,4-D choline salt formulation: 0 (control), 0.068, 0.684, 6.84, 68.4 and 684 g ae ha-1 applied at the plant’s phenological stages second node with fully developed leaves (V2) or fifth node with fully developed leaves (V5). The plants were assessed for their main biometric parameters. The results were analyzed by ANOVA and, when significant, the hormesis model was tested. The maximum effect of hormesis on the main biometric parameters of soybean plants was estimated for doses between 0.20 and 36.01 g ae ha-1 of the herbicide and varies depending on the evaluated phenological stage of the plants. Low doses of 2,4-D choline salt herbicide may increase shoots, roots and total DM when applied at stages V2 and V5 of soybean with determinate growth habit and V2 of indeterminate growth habit. There was no adjustment of the hormesis model for the soybean plant with indeterminate growth habit at stage V5.
author	Pinheiro,Guilherme H.R. Marques,Ricardo F. Araújo,Prissila P.S. Martins,Dagoberto Marchi,Sidnei R.
author_facet	Pinheiro,Guilherme H.R. Marques,Ricardo F. Araújo,Prissila P.S. Martins,Dagoberto Marchi,Sidnei R.
author_sort	Pinheiro,Guilherme H.R.
title	Hormesis effect of 2,4-D choline salt on soybean biometric variables
title_short	Hormesis effect of 2,4-D choline salt on soybean biometric variables
title_full	Hormesis effect of 2,4-D choline salt on soybean biometric variables
title_fullStr	Hormesis effect of 2,4-D choline salt on soybean biometric variables
title_full_unstemmed	Hormesis effect of 2,4-D choline salt on soybean biometric variables
title_sort	hormesis effect of 2,4-d choline salt on soybean biometric variables
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392021000400536
work_keys_str_mv	AT pinheiroguilhermehr hormesiseffectof24dcholinesaltonsoybeanbiometricvariables AT marquesricardof hormesiseffectof24dcholinesaltonsoybeanbiometricvariables AT araujoprissilaps hormesiseffectof24dcholinesaltonsoybeanbiometricvariables AT martinsdagoberto hormesiseffectof24dcholinesaltonsoybeanbiometricvariables AT marchisidneir hormesiseffectof24dcholinesaltonsoybeanbiometricvariables
_version_	1718324248060100608

Hormesis effect of 2,4-D choline salt on soybean biometric variables

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