Comparative floral ontogeny in Adesmia (Leguminosae: Papilionoideae: Dalbergieae)
Maria Cecília de Chiara Moço A and Jorge Ernesto de Araujo Mariath B CA Departamento de Botânica, Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas, Curitiba, Cep. 81531-990, Paraná, PR, Brazil.
B Departamento de Botânica, Universidade Federal do Rio Grande do Sul, Campus do Vale, Av. Bento Gonçalves 9500, Setor 4, prédio 43423, Agronomia, Porto Alegre, Cep. 91501-970, Rio Grande do Sul, Brazil.
C Corresponding author. Email: jorge.mariath@ufrgs.br
Australian Journal of Botany 57(1) 65-75 https://doi.org/10.1071/BT07092
Submitted: 19 May 2007 Accepted: 19 January 2009 Published: 23 March 2009
Abstract
Floral organogenesis of six Brazilian species of Adesmia DC. was studied by scanning electron microscopy. Considering the number of species, this is the most comprehensive organogenetic study of a genus conducted. A unidirectional sepal formation from the adaxial towards the abaxial side of the floral meristem is shown for the first time in the subfamily Papilionoideae. This pattern was found in all studied taxa except for A. latifolia in which the five sepal primordia are formed simultaneously. The present study suggests that the ontogenetic floral differences among Adesmia species may be useful in a re-evaluation of infrageneric categories and for future systematic analyses.
Acknowledgements
We thank Paula Menna Barreto Dias and Miguel Dall’Agnol for providing samples from the greenhouse of Department of Forage Plants and Agrometeorology; Francis Farret Darsie for assistance with scanning electron microscopy; Patricia Soffiatti and Daniel Lottis for comments on the manuscript and assistance with the English language.
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