Data/hora: 10/06/2024 07:57:57

Provedor de dados: 	Genetics and Molecular Biology	
País: 	Brazil	
Título: 	Mitodepressive and clastogenic effects of aqueous extracts of the lichens Myelochroa lindmanii and Canoparmelia texana (Lecanorales, Parmeliaceae) on meristematic cells in plant bioassays	
Autores: 	Campos,José Marcello Salabert de; Davide,Lisete Chamma; Soares,Geraldo Luiz Gonçalves; Viccini,Lyderson Facio.	
Data: 	2008-01-01	
Ano: 	2008	
Palavras-chave: 	Canoparmelia texana; Cytotoxicity; Mitotic index; Myelochroa lindmanii; Plant bioassays.	
Resumo: 	The cytotoxicity effect of aqueous extracts of the lichens species Myelochroa lindmanii and Canoparmelia texana (Lecanorales, Parmeliaceae) were evaluated using meristematic cells of lettuce (Lactuca sativa) and maize (Zea mays). The seasonal effect was also evaluated. Extracts of M. lindmanii and C. texana inhibited root growth and/or percentage germination, possibly due to alterations in the cell cycle. The M. lindmanii extract showed anti-mitotic effects and blocked the cell cycle in metaphase so that c-mitosis and cells with chromosome duplication were produced. The C. texana extract appeared to hinder cell division, increasing the number of interphase cells. In addition, both extracts caused an increase in percentage of cell death. Clastogenic effects were also observed, such as sticky chromosomes, bridges, fragments and later segregation. Both lichen species are thus potential sources of biologically active substances with possible applications in biology, medicine and agronomy.	
Tipo: 	Info:eu-repo/semantics/other	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100024	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/S1415-47572008000100024	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.31 n.1 2008	
Fonte: 	info:eu-repo/semantics/openAccess