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Título: Structure-Activity Relationship Studies of Benzoxazinones and Related Compounds. Phytotoxicity on Echinochloa crus-galli (L.) P. Beauv.
Autores: Chinchilla, Nuria
Oliveros Bastidas, Alberto
Macías, Francisco A.
Marín, David
Molinillo G., José
Varela, Rosa E.
Correo Electrónico: aloliver@ula.ve
famacias@uca.es
Editor: SABER ULA
Resumen: Structure-Activity Relationship Studies of Benzoxazinones and Related Compounds. Phytotoxicity on Echinochloa crus-galli (L.) P. Beauv (Macías, Francisco A.; Chinchilla, Nuria; Varela, Rosa M.; Oliveros, Alberto; Marín, David; and Molinillo G., José M.) Abstract Echinochloa crus-galli ( E. crus-galli; barnyardgrass) is a weed widely distributed. It constitutes a serious weed problem in 42 countries and has been found in at least 27 more. It is the world's main weed of rice affecting up to 36 crops worldwide. Several biotypes of this plant, with resistance to herbicides with different modes of action have evolved. In our ongoing studies regarding the potential application of benzoxazinones and their soil degradation products for weed control, a complete structure-activity relationships (SARs) study was made by using barnyardgrass as the target plant. Compounds used in this study were previously tested on a wide variety of standard target species (STS), and they include natural allelochemicals 2- O-â-D-glucopyranosyl-4-hydroxy-(2 H)-1,4-benzoxazin-3(4 H)-one (DIBOA-Glc), 2,4-dihydroxy-7-methoxy-(2H)-1,4-benzoxazin-3(4H)-one (DIMBOA), and 2,4-dihydroxy- (2 H)-1,4-benzoxazin-3(4 H)-one (DIBOA), together with some degradation derivatives found in wheat crop soil and some synthetic analogues. Their phytotoxicity on E. crus-galliis discussed and compared with the results obtained from previous screening. This work constitutes the next step in the search for natural herbicide models based on benzoxazinones and their degradation products. The most active compounds were the degradation product 2-aminophenol (APH) and the synthetic analogue 4-hydroxy-(2 H)-1,4-benzoxazin-3(4 H)-one (D-DIBOA). Their activities confirm the direction proposed in our previous SAR study, which establishes D-DIBOA to be the best lead for natural herbicide model development with benzoxazinone structure. Published on: Journal Agricultural and Food Chemistry
Fecha: 27-Jul-2005
Palabras Claves: Grupo de Química Ecológica
Palabras Clave: Rice
Echinochloa crus-galli
Barnyardgrass
Benzoxazinones
DIMBOA
DIBOA
Bioassay
4-hydroxy-(2 H)-1,4-benzoxazin-3(4 H)-one
Phytotoxicity
URI: http://www.saber.ula.ve/handle/123456789/16815
Aparece en colecciones:Articulos, Pre-prints (Grupo de Química Ecológica)
Articulos, Pre-prints (Facultad de Ciencias)

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