Glyphosate plus carboxylic compounds boost activity of free radical-scavenging enzymes in sugarcane.

Abstract: Drought, heat, and salinity, as well as pests, are stressing agents, which have impressively declined the productivity and quality of sugarcane crop in harsh environments. Our study aimed to examine the effect of various chemical ripeners as alternatives to enhancing the reactiveness of the enzymatic antioxidant system of sugarcane crop. The field experiment consisted of spraying the ingredients, ethephon, ethyl-trinexapac, glyphosate, carboxylic compounds (MTD) and methyl-sulfumeturon on the Brazilian commercial varieties, SP80-1842 and SP80-3280, before flowering stage. The enzymatic assay comprised the monitoring of the rate of degradation of free radical by ascorbate peroxidase (APX), catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) in the extract from leaves of 11-month-old plants. Spraying glyphosate at 0.15 L ha-1 with MTD at 1.00 L ha-1 provided the highest activity of CAT, 0.65 µmol H2O2 min-1 mg-1 protein, in variety SP80-1842 Spraying glyphosate at 0.15 L ha-1 with ethephon at 0.33 L ha-1 caused the highest activity of APX, 1.70 nmol ascorbate min-1 mg-1 protein, in variety SP80-3280. The conclusion is, therefore, that mixtures of glyphosate with the insecticide/acaricide, MTD, and with the synthetic ethylene-releasing product, ethephon could help sugarcane crop grow adequately under uncontrollable or unpredictable agroecosystems like marginal lands.

Bibliographic Details

Main Authors:	MOREIRA, B. R. de A., VIANA, R. da S., FIGUEIREDA, P. A. M. de, LISBOA, L. A. M., MIASAKI, C. T., MAGALHÃES, A. C., RAMOS, S. B., VIANA, C. R. de A., TRINDADE, V. D. R., MAY, A.
Other Authors:	BRUNO RAFAEL DE ALMEIDA MOREIRA, FEIS-UNESP; RONALDO DA SILVA VIANA, FCAT-UNESP; PAULO ALEXANDRE MONTEIRO DE FIGUEIREDO, FCAT-UNESP; LUCAS APARECIDO MANZANI LISBOA, FCAT-UNESP; CELSO TADAO MIASAKI, FCAT-UNESP; ANDERSON CHAGAS MAGALHÃES, FCAT-UNESP; SÉRGIO BISPO RAMOS, FCAT-UNESP; CHARLENE RAQUEL DE ALMEIDA VIANA, FEIS-UNESP; VANESSA DIAS REZENDE TRINDADE, FCAT-UNESP; ANDRE MAY, CNPMA.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2020-10-03
Subjects:	Induced oxidative stress, Plant growth regulators, Saccharum sp., Cana de Açúcar, Herbicida, Regulador de Crescimento, Estimulante de Crescimento Vegetal, Sugarcane, Plant growth substances, Glyphosate, Oxidative stress,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125257 https://doi.org/10.3390/agriculture10040106
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