Banca de DEFESA: PERLA FONSECA AMORIM DE ARAÚJO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : PERLA FONSECA AMORIM DE ARAÚJO
DATA : 07/08/2020
HORA: 14:00
LOCAL: Campus Centro-Oeste
TÍTULO:

MODEL OF NATURAL SUBSTANCES POTENTIALLY HERBICIDES

PALAVRAS-CHAVES:

phytotoxic activity, phenolic compounds, benzoxazinones, pyridoxazinones.

PÁGINAS: 73
GRANDE ÁREA: Ciências Biológicas
ÁREA: Bioquímica
RESUMO:

Invasive plants are the cause of great concern for agriculture in Brazil and worldwide. The frequent and excessive use of herbicides, over the years, has caused a situation of resistance that is aggravated when it is related to damage to the environment and living beings, whether in the short or long term, due to direct or indirect exposure to these agents. The growing emphasis on organic agriculture and environmental protection has given great attention to allelopathic research through the use of plant extracts with biological activity to replace synthetic herbicides, making them safer and less aggressive alternatives. Thus, in the present work, potentially herbicidal substances (phenolic, acid and benzoxazinones) were tested, coming from natural products and belonging to the most studied classes over the past few years. The compounds obtained by hemisynthesis of a natural constituent, (3,4,5-trimethoxybenzoic acid and 2,4,6 trimethoxyphenol), in addition to its novel product, obtained by synthesis via SN2 reaction (3,4,5- trimethoxybenzoate of 2 -ethoxy-2-oxoethyl) showed phytotoxic activity in tests with seeds of cultivars of economic interest. Benzoxazinone and its analog (3-hydroxy-2- nitropyridine), showed excellent results, inhibiting practically 100% germination in lettuce, onion and tomato seeds, pointing out these compounds as promising prototypes for potential herbicides from natural sources.

MEMBROS DA BANCA:
Externo à Instituição - ALYSSON RODRIGO FONSECA E SILVA - UEMG
Interno - 434006 - JOAO MAXIMO DE SIQUEIRA
Externo à Instituição - LUCAS FERNANDES DO CARMO - CEFET/MG