Data/hora: 02/06/2024 03:43:16

Provedor de dados: 	Acta Botanica Brasilica	
País: 	Brazil	
Título: 	Taxonomic value of foliar characters in Dahlstedtia Malme: Leguminosae, Papilionoideae, Millettieae	
Autores: 	Teixeira,Simone de Pádua; Gabrielli,Antonio Carlos.	
Data: 	2006-06-01	
Ano: 	2006	
Palavras-chave: 	Cambial activity; Dahlstedtia pinnata; Dahlstedtia pentaphylla; Paraveinal mesophyll; Secretory cavity.	
Resumo: 	Dahlstedtia Malme (Leguminosae) is a neotropical genus, native to the Brazilian Atlantic Forest, and comprises two species, D. pinnata (Benth.) Malme and D. pentaphylla (Taub.) Burk., although it has been considered a monotypic genus by some authors. Leaf anatomy was compared to verify the presence of anatomical characters to help delimit species. Foliar primordium, leaflet, petiolule, petiole and pulvinus were collected from cultivated plants (Campinas, SP, Brazil) and from natural populations (Picinguaba, Ubatuba and Caraguatatuba, SP, Brazil - D. pinnata; Antonina, PR, Brazil - D. pentaphylla). Studies on leaflet surface assessment (Scanning Electron Microscopy), as well as histology and venation analyses were carried out of dehydrated, fresh and fixed material from two species. Leaflet material was macerated for stomatal counts. Histological sections, obtained by free-hand cut or microtome, were stained with Toluidine Blue, Safranin/Alcian Blue, Ferric Chloride, Acid Phloroglucin. Secretory cavities are present in the lamina, petiolule, petiole, pulvinus and leaf primordium in D. pentaphylla, but not in D. pinnata, and can be considered an important character for species diagnosis. Other leaf characters were uninformative in delimiting Dahlstedtia species. There is cambial activity in the petiolule, petiole and pulvinus. This study, associated with other available data, supports the recognition of two species in Dahlstedtia.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062006000200014	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/S0102-33062006000200014	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.20 n.2 2006	
Fonte: 	info:eu-repo/semantics/openAccess