Data/hora: 11/06/2024 09:03:38

Provedor de dados: 	74	
País: 	Brazil	
Título: 	Plant responses to stresses: role of ascorbate peroxidase in the antioxidant protection	
Autores: 	Caverzan,Andréia; Passaia,Gisele; Rosa,Silvia Barcellos; Ribeiro,Carolina Werner; Lazzarotto,Fernanda; Margis-Pinheiro,Márcia.	
Data: 	2012-01-01	
Ano: 	2012	
Palavras-chave: 	Ascorbate peroxidase; Antioxidant system; Reactive oxygen species; Abiotic stress; Mutant plants.	
Resumo: 	When plants are exposed to stressful environmental conditions, the production of Reactive Oxygen Species (ROS) increases and can cause significant damage to the cells. Antioxidant defenses, which can detoxify ROS, are present in plants. A major hydrogen peroxide detoxifying system in plant cells is the ascorbate-glutathione cycle, in which, ascorbate peroxidase (APX) enzymes play a key role catalyzing the conversion of H2O2 into H2O, using ascorbate as a specific electron donor. Different APX isoforms are present in distinct subcellular compartments, such as chloroplasts, mitochondria, peroxisome, and cytosol. The expression of APX genes is regulated in response to biotic and abiotic stresses as well as during plant development. The APX responses are directly involved in the protection of plant cells against adverse environmental conditions. Furthermore, mutant plants APX genes showed alterations in growth, physiology and antioxidant metabolism revealing those enzymes involvement in the normal plant development.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600016	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572012000600016	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.35 n.4 suppl.1 2012	
Fonte: 	info:eu-repo/semantics/openAccess