Diatomáceas encionemoides e gonfonemoides (Cymbellales, Bacillariophyta) do estado de Goiás: flora geral e variabilidade morfológica e genética do complexo Gomphonema parvulum
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Universidade Federal de Goiás
Bacillariophyta are unicellular microscopic algae, pseudofilamentosas or colonial, important constituents of phytoplankton and periphyton. Cymbellales presents similar individuals as the forms, shapes and adornments of frustules. Relations between representatives of Cymbellales order are still poorly understood and the diacritical features based on morphology have led to confusion in the constituency of the recorded species and difficult to identify in flora jobs worldwide. The aim of this study was to inventory the species occurrence Cymbellales encionemoides and gonfonemoides in aquatic environments in the state of Goiás. The results were divided into two articles: "Encyonema, Encyonopsis and Kurtkrammeria (Cymbellales, Bacillariophyta) in Brazil in the Midwest." 10 taxa were identified Cymbellaceae encionemoides including six at the species level; four did not have infrageneric identity recognized. Were identified 10 taxa Cymbellaceae encionemoides these six at the species level; four did not show infrageneric identity recognized by literature. The identified species, Encyonema rumrichae is a new citation to the state of Goiás and Encyonema sileciacum the most widely distributed taxon. The second article entitled "Morphological and genetic variability of representatives of the complex Gomphonema parvulum (Cymbellales, Bacillariophyceae) in Brazil's Central region." The Gomphonema parvulum complex adds 27 taxa names of which only 12 are accepted taxonomically. The aim of this study was to compare the morphological variability and genetic G. parvulum and G. lagenula in natural samples and cultured from the representatives of the state of Goiás. The material was collected and isolated monoclonal cultures studied in light and electron microscopy and through the 18S marker V4 region. It was found that the distinction between complex G. parvulum taxa can be made safely only from molecular characters, as intraspecific variability is marked morphological and intersected with respect to interspecific variability. The analysis of the genetic marker sequences 18SV4 corroborates existence of cryptic species within the complex.
BENICIO, S. H. M. Diatomáceas encionemoides e gonfonemoides (Cymbellales, Bacillariophyta) do estado de Goiás: flora geral e variabilidade morfológica e genética do complexo Gomphonema parvulum. 2016. 112 f. Dissertação (Mestrado em Biodiversidade Vegetal) - Universidade Federal de Goiás, Goiânia, 2016.