| Registro completo |
| Provedor de dados: |
Rev. Bras. Bot.
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| País: |
Brazil
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| Título: |
Reproductive biology of Protium spruceanum (Burseraceae), a dominant dioecious tree in vegetation corridors in Southeastern Brazil
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| Autores: |
Vieira,Fábio de Almeida
Appolinário,Vivette
Fajardo,Cristiane Gouvêa
Carvalho,Dulcinéia de
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| Data: |
2010-12-01
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| Ano: |
2010
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| Palavras-chave: |
Dioecy
Floral visitors
Flowering
Fruiting
Secondary forest
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| 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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000400018
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| Editor: |
Sociedade Botânica de São Paulo
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| Relação: |
10.1590/S0100-84042010000400018
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Botany v.33 n.4 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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