Data/hora: 16/06/2024 09:04:34

Provedor de dados: 	52	
País: 	Brazil	
Título: 	Phytotoxicity of Perlatolic Acid and Derivatives	
Autores: 	Peres,Marize Terezinha; Cândido,Ana Carina S.; Faccenda,Odival; Gianini,Aline Siqueira; Honda,Neli Kika.	
Data: 	2016-01-01	
Ano: 	2016	
Palavras-chave: 	Perlatolic acid; 2-hydroxy-4-methoxy-6-n-pentylbenzoates; Lactuca sativa; Allium cepa; Allelopathy.	
Resumo: 	ABSTRACT Perlatolic acid (1), methyl perlatolate (2), and the products of perlatolic acid alcoholysis-namely, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, and n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (3-11)-were evaluated for their herbicidal potential on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. The compounds exhibited low phytotoxicity on L. sativa germination. Perlatolic acid (1) proved the most active compound (20%). Activity was lowest for n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (11) (3.5%). The esters iso-propyl and sec-butyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (6 and 8, respectively) inhibited root (35% e 43%, respectively) and hypocotyl growth (59% e 56%, respectively). The esters n-butyl, n-pentyl, and n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (7, 10, and 11, respectively) proved phytotoxic to A. cepa, delaying and reducing seed germination (27%), while n-pentyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (10) was the most inhibitory for root (42%) and coleoptile growth (24%). The behaviors of iso-propyl, sec-butyl, and n-pentyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (6, 8, and 10, respectively) suggest the potential utility of these esters as natural herbicides. The esters iso-propyl and sec-butyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (6 and 8, respectively) may serve as model molecules in the investigation of potential herbicides for dicotyledon control, while n-pentyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (10) may serve the same function for monocotyledon species.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100205	
Editor: 	Instituto de Tecnologia do Paraná - Tecpar	
Relação: 	10.1590/1678-4324-2016160118	
Formato: 	text/html	
Fonte: 	Brazilian Archives of Biology and Technology  v.59 2016	
Fonte: 	info:eu-repo/semantics/openAccess