| Texto completo | |
| Autor(es): |
Bittencourt-Oliveira, Maria do Carmo
[1]
;
Moura, Ariadne do Nascimento
[2]
;
de Oliveira, Mariana Cabral
[3]
;
Massola, Jr., Nelson Sidnei
[4, 5, 6]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Luiz Queiroz Coll Agr, Dept Biol Sci, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Fed & Rural Pernambuco, Dept Biol, BR-52171030 Recife, PE - Brazil
[3] Univ Sao Paulo, Inst Biosci, Dept Bot, BR-05508900 Sao Paulo, SP - Brazil
[4] Univ Sao Paulo, Luiz Queiroz Coll Agr, Dept Entomol, BR-13418900 Piracicaba, SP - Brazil
[5] Univ Sao Paulo, Luiz Queiroz Coll Agr, Dept Plant Pathol, BR-13418900 Piracicaba, SP - Brazil
[6] Univ Sao Paulo, Luiz Queiroz Coll Agr, Dept Agr Zool, BR-13418900 Piracicaba, SP - Brazil
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHYCOLOGY; v. 45, n. 3, p. 716-725, JUN 2009. |
| Citações Web of Science: | 12 |
| Resumo | |
Geitlerinema amphibium (C. Agardh ex Gomont) Anagn. and G. unigranulatum (Rama N. Singh) Komarek et M. T. P. Azevedo are morphologically close species with characteristics frequently overlapping. Ten strains of Geitlerinema (six of G. amphibium and four of G. unigranulatum) were analyzed by DNA sequencing and transmission electronic and optical microscopy. Among the investigated strains, the two species were not separated with respect to cellular dimensions, and cellular width was the most varying characteristic. The number and localization of granules, as well as other ultrastructural characteristics, did not provide a means to discriminate between the two species. The two species were not separated either by geography or environment. These results were further corroborated by the analysis of the cpcB-cpcA intergenic spacer (PC-IGS) sequences. Given the fact that morphology is very uniform, plus the coexistence of these populations in the same habitat, it would be nearly impossible to distinguish between them in nature. On the other hand, two of the analyzed strains were distinct from all others based on the PC-IGS sequences, in spite of their morphological similarity. PC-IGS sequences indicate that these two strains could be a different species of Geitlerinema. Using morphology, cell ultrastructure, and PC-IGS sequences, it is not possible to distinguish G. amphibium and G. unigranulatum. Therefore, they should be treated as one species, G. unigranulatum as a synonym of G. amphibium. (AU) | |
| Processo FAPESP: | 04/01749-6 - Variações genotípicas e morfométricas de Geitlerinema amphibium (Ag. Ex Gom.) Anag. (Cyanobacteria) em reservatórios com condições ambientais diferenciadas |
| Beneficiário: | Maria Do Carmo Bittencourt de Oliveira |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |