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	Provedor de dados Acta Botanica (2) Autor Saba,Marileide Dias (2) Silveira Júnior,Cristiano Eduardo Amaral (2) Jardim,Jomar Gomes (1) Lima,Luciene Cristina Lima e (1) Palavra-chave Palynology (2) Gentianales (1) Heterostyly (1) Pollen grains (1) Taxonomy (1) Ultrastructure (1) Waltheria (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (1) 2012 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Pollen morphology of Waltheria L. (Malvaceae-Byttnerioideae) from Bahia, Brazil Acta Botanica Silveira Júnior,Cristiano Eduardo Amaral; Lima,Luciene Cristina Lima e; Saba,Marileide Dias. ABSTRACT Waltheria encompasses about 60 species distributed in Brazil and Mexico. To improve the palynology of the genus, we analyzed 14 species occurring in the Brazilian State of Bahia. Pollen grains were acetolyzed and examined using light microscopy and scanning electron microscopy. Non-acetolyzed pollen grains were viewed by transmission electron microscopy. The results revealed two general pollen types based on exine ornamentation, such as reticulate and echinate, which are distinct with regard to (1) size and shape, (2) apertural type and number, (3) relative length of ectoapertures, and (4) thickening of the nexine compared to the sexine. An ultrastructural analysis of the pollen wall revealed a continuous foot layer and a compact and discontinuous... Tipo: Info:eu-repo/semantics/article Palavras-chave: Heterostyly; Palynology; Ultrastructure; Taxonomy; Waltheria. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400597 Pollen morphology of Rubiaceae Juss. species occurring in an area of caatinga (dryland) vegetation in Bahia State, Brazil Acta Botanica Silveira Júnior,Cristiano Eduardo Amaral; Saba,Marileide Dias; Jardim,Jomar Gomes. The palynology of the following 16 species of Rubiaceae, from Brejinho das Amestistas, was investigated: Coccocypselum hirsutum Bartl. ex DC., Cordiera rigida Kuntze, Coutarea hexandra K.Schum., Declieuxia fruticosa Kuntze, Diodella apiculata (Willd. ex Roem. & Schult.) Delprete, D. radula (Willd. ex Roem. & Schult.) Delprete, D. teres Small., Emmeorhiza umbellata K.Schum., Leptoscela ruellioides Hook. f., Mitracarpus baturitensis Sucre., Mitracarpus villosus Cham. & Schltdl., Palicourea rigida Kunth, Psyllocarpus asparagoides Mart., Richardia grandiflora Steud., Staelia aurea K. Schum., and Staelia galioides DC. The pollen grains were acetolysed to and their morphological characters were analyzed using light and scanning electron... Tipo: Info:eu-repo/semantics/article Palavras-chave: Gentianales; Pollen grains; Palynology. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000200020 Registros recuperados: 2 Primeira ... 1 ... Última

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