Data/hora: 09/06/2024 00:47:00

Provedor de dados: 	88	
País: 	Brazil	
Título: 	Reproductive biology of Protium spruceanum (Burseraceae), a dominant dioecious tree in vegetation corridors in Southeastern Brazil	
Autores: 	Vieira,Fábio de Almeida; Appolinário,Vivette; Fajardo,Cristiane Gouvêa; Carvalho,Dulcinéia de.	
Data: 	2010-12-01	
Ano: 	2010	
Palavras-chave: 	Dioecy; Floral visitors; Flowering; Fruiting; Secondary forest.	
Resumo: 	We investigated the reproductive biology of Protium spruceanum (Benth.) Engler in vegetation corridors of secondary Atlantic forest in Lavras, southern Minas Gerais State, Brazil. The reproductive phenology was investigated fortnightly over a one year period. Floral biology studies involved pollen viability analysis, nectar production, stigmatic receptivity, pollen tube growth, visiting insect species and visit rates. The small, pale yellowish flowers (0.3-0.4 cm diameter) are functionally unisexual and organized in dense inflorescences (ca. 45 flowers). P. spruceanum presented annual flowering between September and November. Staminate flowers supplied a high percentage of viable pollen (90.6%) and relatively abundant nectar (x = 4.5 μL). Pistillate flowers produced only nectar to flower visitors (x = 4.0 μL). The effective pollinators were Apis mellifera and Trigona sp. (Hymenoptera, Apidae). Pollen tubes of cross-pollinated flowers were observed entering the ovaries 48 h after pollination. The fruiting season is from October to March, with a peak in November, coinciding with the rainfall peak. Ecological implications of these findings, and alternative arguments to explain the high genetic diversity at regional landscape are discussed.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000400018	
Editor: 	Sociedade Botânica de São Paulo	
Relação: 	10.1590/S0100-84042010000400018	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Botany  v.33 n.4 2010	
Fonte: 	info:eu-repo/semantics/openAccess