Estudos taxonômicos e morfopolínicos das Cucurbitáceas do Estado de Goiás, Brasil
Carregando...
Data
2017-03-29
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The family Cucurbitaceae Juss. is include in Cucurbitales order
in the clade Eurosids I, 2295 spp., included in 129 tropical and temperate genera distributed in seven
families of different morphological and ecological characteristics. The family has 98 genera and 975
species. In Brazil is represented by about 30 genera and 157 species. This work deals with the taxonomic
study of plants of the Cucurbitaceae family Juss. found in the State of Goias, Brazil to contribute
information to update the Flora of Brazil. Exsiccatae analyzes were performed deposited in national and
international herbaria and conducting expeditions in the study area. 19 genera and 40 species in the area
were located, so 09 genera and 28 species of native plants. Relative to native plants, Cayaponia Silva
Manso gender had a greater number of species (8 spp.), followed by Melothria L. (6 spp.), Gurania
(Schltdl.) Cogn. (4 spp.), Ceratosanthes Adans. (3 spp.) Psiguria Neck ex. Arn.and Sicyos L. (2 spp.), and
the genres Melothrianthus Mart. Crov., Siolmatra Baill, Wilbrandia Silva Manso, are represented by only
one species each. Pollen morphology of six native and two sub-spontaneous species of
Cucurbitaceae occurring in the state of Goias, Midwest Region of Brazil, were analyzed with the
goal of understanding the palynology and taxonomy of selected species. Pollen grains were
acetolyzed, measured, described, photographed and electromicrographed. Analysis under the
SEM was used to elucidate questions about the ornamentation of the exine. Pollen grains are in
monads in Cayaponia podantha Cogn., Ceratosanthes tomentosa Cogn., Luffa operculata (L.)
Cogn., Melothria campestris (Naudin) H. Schaefer & S. S. Renner, Momordica charantia L.,
Wilbrandia hibiscoides Silva Manso or tetrads in Gurania lobata (L.) Pruski and Psiguria
umbrosa (Kunth) C. Jeffrey; average size, large or very large in monads and very large in tetrads.
The openings ranged from pores in Cayaponia podantha, colpores in other monads and pores in
tetrads. Regarding ornamentation, spiny sexine were registered in Cayaponia podantha,
perforated sexine in Melothria campestris, micro-reticulated sexine in Gurania lobata and
Psiguria umbrosa and reticulated sexine in other taxa. Results allowed the distinction between
genera, indicating that the pollen morphology contributes to the taxonomic studies and the family
is considered eurypalynous. These data emphasize the importance of pollen morphology for the
diagnosis of genera into Cucurbitaceae.
Descrição
Palavras-chave
Citação
MOURA, B. E. L. Estudos taxonômicos e morfopolínicos das Cucurbitáceas do Estado de Goiás, Brasil. 2017. 144 f. Dissertação (Mestrado em Biodiversidade Vegetal) - Universidade Federal de Goiás, Goiânia, 2017.