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Provedor de dados:  Acta Botanica
País:  Brazil
Título:  Floral biology and breeding system of Psychotria tenuinervis Muell. Arg. (Rubiaceae) in the Atlantic rain forest, SE Brazil
Autores:  Virillo,Carolina Bernucci
Ramos,Flavio Nunes
Castro,Cibele Cardoso de
Semir,João
Data:  2007-12-01
Ano:  2007
Palavras-chave:  Atlantic forest
Distyly
Flower
Herkogamy
Pollination
Resumo:  (Floral biology and breeding system oi Psychotria tenuinervis Muell. Arg. (Rubiaceae) in the Atlantic rain forest, SE Brazil). The aim of this study was to investigate pollination biology, floral morphometry, morph ratio and breeding system oiPsychotria tenuinervis in an area of Atlantic rain forest in southeastern Brazil. Pollination biology was studied based on focal observations and the breeding system was determined using controlled crosses; data on flower production and floral morphometry were compared between the two floral morphs. Flower production by the two floral morphs was similar, with flowers being reciprocally herkogamous, diurnal and pollinated at similar frequencies, mainly by medium-sized bees. Corolla length and diameter, as well as anther length, were similar between the floral morphs, whereas stigma lobes were larger in thrums. Psychotria tenuinervis is a preferentially self- and intramorph-incompatible, non-apomitic species, with isoplethic populations. At the study site, P. tenuinervis may be considered as a typical distylous species, with reciprocal herkogamous flowers that favour intermorph pollinations and legitimate matings.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000400012
Editor:  Sociedade Botânica do Brasil
Relação:  10.1590/S0102-33062007000400012
Formato:  text/html
Fonte:  Acta Botanica Brasilica v.21 n.4 2007
Direitos:  info:eu-repo/semantics/openAccess
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