EFFECT OF POST-EMERGENT HERBICIDES APPLICATION ON CAROTENOID CONCENTRATION IN GREEN CORN

Authors

  • SARA DE ALMEIDA RIOS Embrapa
  • DÉCIO KARAM Embrapa Milho e Sorgo
  • ALUIZIO BOREM Universidade Federal de Viçosa
  • WILTON SOARES CARDOSO Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo
  • MARIA CRISTINA DIAS PAES Embrapa Milho e Sorgo

DOI:

https://doi.org/10.18512/1980-6477/rbms.v15n2p262-271

Keywords:

Zea mays, carotenoid biosynthesis, carotenes, vitamin A, herbicide.

Abstract

ABSTRACT - Considering the influence of herbicides in the metabolism of the carotenoids in corn, the objective of the present study was to evaluate the effect of herbicides and genotype on carotenoids concentration. The green corn hybrids BRS 1030 and P30F53 were subjected to a post-emergent herbicides application at 20 and 30 days after emergence. Carotenoids were extracted from corn grains and analyzed to quantify α- and β-carotene, lutein, zeaxanthin, β-cryptoxanthin, total carotenoids (TC), and total of vitamin A carotenoids precursors (proVA). The application of foramsulfuron + iodosulfuron-methyl-sodium (40 + 2.6 g ha-1), nicosulfuron (20 g ha-1), mesotrione (120 g ha-1) and tembotrione (80 g ha-1 and 100 g ha-1) promoted higher concentration of carotenoids in fresh green corn. Lutein, zeaxanthin, β-cryptoxanthin, β-carotene, α-carotene, proVA carotenoids, and TC concentration increased after foramsulfuron + iodosulfuron-methyl-sodium in late application (V5 to V6), nicosulfuron in both applications, mesotrione applied post-initial (V3 to V4), tembotrione (100 g ha-1) in both applications and tembotrione (80 g ha-1) in late post-application, at least for one hybrid. The content of carotenoids in the green corn kernels differed between ‘BRS 1030’ and ‘P30F53’. Our results suggest a possibility of significant increase of carotenoids in green corn kernels through the handling of corn production with post-emergent herbicides.

Key words: Zea mays, carotenoid biosynthesis, carotenes, vitamin A, herbicide.

A APLICAÇÃO DE HERBICIDAS PÓS-EMERGENTES INFLUENCIA A CONCENTRAÇÃO DE CAROTENOIDES EM MILHO VERDE

RESUMO - Considerando a influência dos herbicidas no metabolismo de carotenoides em milho, o objetivo foi avaliar o efeito dos herbicidas e do genótipo na concentração de carotenoides. Os híbridos de milho verde BRS 1030 e P30F53 foram submetidos à aplicação de herbicidas aos 20 e aos 30 dias após a emergência. Os carotenoides foram extraídos dos grãos e analisados para quantificar α-caroteno, β-caroteno, luteína, zeaxanthina, β-cryptoxanthina, carotenoides totais (CT) e total de carotenoides precursores de vitamina A (proVA). As aplicações dos herbicidas foramsulfuron + iodosulfuron-methyl-sodium (40 + 2.6 g ha-1), nicosulfuron (20 g ha-1), mesotrione (120 g ha-1) e tembotrione (80 g ha-1 and 100 g ha-1), aplicados em mistura com atrazine (1.000 g ha-1), promoveram aumento da concentração de carotenoi-des em grãos de milho verde. Luteína, zeaxantina, β-cryptoxantina, β-caroteno, α-caroteno, proVA carotenoides e CT em grãos de milho verde aumentaram após foramsulfuron + iodosulfuron-methyl-sodium na aplicação tardia (estágios V5 a V6), nicosulfuron em ambas as aplicações, mesotrione aplicado pós-inicial (V3 a V4), tembotrione (100 g ha-1) em ambas as aplicações e tembotrione (80 g ha-1) na aplicação tardia, pelo menos em um dos híbridos avaliados. O teor de carotenoides nos grãos de milho verde diferiu entre ‘BRS 1030’ e ‘P30F53’, indicando o efeito do genótipo na biossíntese destes compostos. Os resultados sugerem a possibilidade de aumento significativo de carotenoides em grãos de milho verde por meio do manejo da produção de milho com os herbicidas pós-emergentes.

Palavras-chave: Zea mays, biossíntese de carotenoides, carotenos, vitamina A, herbicidas.

Author Biography

SARA DE ALMEIDA RIOS, Embrapa

Eng. Agrônoma, Mestre e Doutora em Genética e Melhoramento de Plantas, atualmente Pesquisadora da Embrapa CPAA atuando na área de Pré-Melhoramento e Melhoramento de dendê e caiaué.

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Published

2016-07-21

How to Cite

RIOS, S. D. A., KARAM, D., BOREM, A., CARDOSO, W. S., & PAES, M. C. D. (2016). EFFECT OF POST-EMERGENT HERBICIDES APPLICATION ON CAROTENOID CONCENTRATION IN GREEN CORN. REVISTA BRASILEIRA DE MILHO E SORGO, 15(2), 262–271. https://doi.org/10.18512/1980-6477/rbms.v15n2p262-271

Issue

Vol. 15 No. 2 (2016)

Section

Scientific Paper

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