Data/hora: 08/06/2024 16:49:11

Provedor de dados: 	39	
País: 	Brazil	
Título: 	Stigmatic surface in the Vochysiaceae: reproductive and taxonomic implications	
Autores: 	Carmo-Oliveira,Renata; Morretes,Berta Lange de.	
Data: 	2009-09-01	
Ano: 	2009	
Palavras-chave: 	Callisthene; Qualea; Salvertia; Stigma receptivity; Vochysia.	
Resumo: 	The Vochysiaceae are Neotropical trees and shrubs, common in the savanna areas in Central Brazil (Cerrados). The family has been traditionally divided into two tribes: Erismeae, with three genera, and Vochysieae, with five genera. We investigated the stigmatic surface of six Vochysiaceae species, belonging to four genera of Vochysieae: Vochysia, Salvertia, Callisthene and Qualea. Flowers and buds at different developmental stages were collected. Morphological features were observed on fresh material and stigmatic receptivity was inferred based on esterasic activity. Pistils were fixed and embedded in paraplast and sectioned on a rotary microtome; the sections were stained before histological analysis. Stigmas of open flowers were also observed by scanning electron microscopy. Stigmas of all species were wet and showed esterasic activity at pre-anthesis and anthesis stages. Stigmatic surface was continuous with transmitting tissue of glandular nature. Vochysia and Salvertia stigmatic surfaces were formed by multicelular uniseriate hairs, and species of the remaining genera showed papillate surface. The exudate over mature stigmas in all species flowed without rupture of stigmatic surface and pollen tubes grew down between hairs or papillae. Differences on the stigmatic surface agreed with a phylogenetic reconstruction that separated two clades and indicated that Vochysieae is not monophyletic. Stigmatic features could not be associated with pollination and breeding systems.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300018	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/S0102-33062009000300018	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.23 n.3 2009	
Fonte: 	info:eu-repo/semantics/openAccess