Pollen morphology and exine ultrastructure of Brasiliocroton P.E. Berry & Cordeiro (Euphorbiaceae)

ABSTRACT The present study aimed to morphologically characterize the pollen grains of species of Brasiliocroton mamoninha and B. muricatus in order to expand palynological knowledge of the group and provide additional micromorphological information useful for studies of the relationships within Crot...

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Bibliographic Details
Published in:Acta Botânica Brasílica 2019-09, Vol.33 (3), p.584-591
Main Authors: Souza, Lidian Ribeiro de, Santos, Francisco de Assis Ribeiro dos, Carneiro-Torres, Daniela Santos
Format: Article
Language:English
Subjects:
Croton pattern
Crotoneae
micromorphology
palynotaxonomy
pollen grains
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Summary:ABSTRACT The present study aimed to morphologically characterize the pollen grains of species of Brasiliocroton mamoninha and B. muricatus in order to expand palynological knowledge of the group and provide additional micromorphological information useful for studies of the relationships within Crotoneae. Polleniferous material was acetolysed and described using light, scanning electron and transmission microscopy. The pollen grains of the two species of Brasiliocroton were apolar, spherical, inaperaturate and medium-sized with a Croton ornamentation pattern. The Croton pattern of B. mamoninha is formed by subtriangular pila, >5-plicate with pointed apices, while for B. muricatus it is formed by subcircular to circular pila,
ISSN:0102-3306
1677-941X
1677-941X
DOI:10.1590/0102-33062019abb0183