Mestrado em Biodiversidade Vegetal (ICB)
URI Permanente para esta coleção
Navegar
Navegando Mestrado em Biodiversidade Vegetal (ICB) por Por Orientador "Nogueira, Ina de Souza"
Agora exibindo 1 - 3 de 3
Resultados por página
Opções de Ordenação
Item Diatomáceas encionemoides e gonfonemoides (Cymbellales, Bacillariophyta) do estado de Goiás: flora geral e variabilidade morfológica e genética do complexo Gomphonema parvulum(Universidade Federal de Goiás, 2016-03-29) Benicio, Sarah Haysa Mota; Silva, Weliton José da; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4745159Y0; Nogueira, Ina de Souza; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4782283E3; Nogueira, Ina de Souza; Silva, Welinton José da; Menezes, Mariângela; Oliviera, Bárbara DunckBacillariophyta 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.Item Cianobactérias planctônicas do reservatório do ribeirão João Leite (Goiás) durante a fase de enchimento: florística e floração(Universidade Federal de Goiás, 2014-03-21) Carmo, Elaine Jacob da Silva Carmo; Nogueira, Ina de Souza; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4782283E3; Nogueira, Ina de Souza; Gomes, Lenora Nunes Ludolf; Jardim, Fernando AntônioRibeirão Leite is considered as one of the main sources of public water supply for the city of Goiânia and its metropolitan region. The soil in the watershed is principally used for agro-pastoral activities that may favor the supply of nutrients such as phosphorus and nitrogen for the water reservoir and consequently for the formation of blooms of microalgae and cyanobacteria. No floristic studies of cyanobacteria have been carried out for this reservoir, which is recently formed, however there has been pre-dominance of potentially toxic planktonic cyanobacteria during the filling of this reservoir, which reflects the limnological conditions of the Ribeirão Leite basin. The present study aims to identify and characterize the morphospecies of cyanobacteria and evaluate structure and dynamics of populations. The sample period comprised the date from January 2010 to January 2011, which was filling stage, with the collection of phytoplankton and limnologicals carried out twice a week until the first half of May 2010, and from this date, it was repeated weekly. Physicochemical and also qualitative and quantitative analyzes of phytoplankton were performed in water analysis laboratory of Saneago. Specimens of cyanobacteria were analyzed with microscopy “Zeiss Axiostar plus”, and micro-photographed with image capture system “Axiocam ERc5s” and also with imaging system “Axiovision”. The initial phase of filling of the reservoir demonstrated the greatest efficiency on rainy period of the year, nevertheless, the intermediate phase, which was on dry period, showed lower efficiency. The blooms were observed as characteristics of rainy periods of the year. In the first period, there was the dominance of Geitlerinema amphibium and Cylindrospermopsis raciborskii and in the second period, Aphanocapsa delicatissima was observed as dominant. It was monitored that during the filling phase, there was predominance of filamentous cyanobacteria and in the final phase, dominance was of the colonial organisms. The PCA indicated that the explanatory variables of the system were turbidity, total phosphorus and Secchi disk depth extinction coefficient (axis 1 to 31.7%). In Canonical Correspondence Analysis (CCA), sampling units were influenced on the 1º axis by the dominance of G. amphibium at the stage of filling, when the turbidity was high and Secchi depth (axis 1 to 14.8%, p <0.05; environment correlation of species 0.806) was lower. The Detrended Correspondence Analysis confirmed the distribution of taxa among different climatic periods. For the state of Goiás, 28 taxa were mentioned for the first timeItem Família scenedesmaceae (chlorophyceae, sphaeropleales) no estado de Goiás: biodiversidade e distribuição geográfica(Universidade Federal de Goiás, 2015-03-04) Oliveira, Renato Silva; Nogueira, Ina de Souza; http://lattes.cnpq.br/3877834258990173; Nogueira, Ina de Souza; Tucci, Andrea; Correa, Débora MachadoScenedesmaceae Oltmans are Chlorophyta cenobial fresh water cocoides belonging to the order Sphaeropleales (Luerssen) emend Deason. This family of algae for some decades was classified in Chlorococcales sensu latu based only on cytomorphological criteria. Subsequently, ultrastructural and molecular data confirmed the need to reposition some families and genders. Fifteen genera were considered for the family Scenedesmaceae according to published works until the validity of this work. Scenedesmaceae comprises 3 subfamilies: Scenedesmoidea, Desmodesmoidea and Coelastroidea, the latter not contemplated in this study. The number of papers for Brazil is representative, but in Goiás it is still scarce, a fact that motivated the present study. The objective of this work was to perform an inventory of planktonic Scenedesmaceae morphospecies in the State of Goiás covering the main hydrographic regions of the state. A floristic inventory of Scenedesmaceae from the State of Goiás was carried out between March 2013 and December 2014. This study was carried out with collections from different localities, covering the three hydrographic regions and different environments (lentic and lotic). The samples were fixed in Transeau solution and later deposited in the UFG Herbarium. The study was based on collections of raw water or 25 μm network for phytoplankton material. Scanning electron microscopy and scanning electron microscopy were performed. The classification system adopted was that of Krienitz and Bock published in 2012, with some adaptations of Hegewald and collaborators in the works of 2010 and 2013. A total of 220 samples from 18 municipalities in the State of Goiás were analyzed. The algae obtained from natural populations were described, commented and microphotographed, and when necessary the phenotypic plasticity was reported together with taxonomic considerations. Desmodesmus communis, Desmodesmus maximus and Scenedesmus ellipticus were the common species, 13 taxa were registered with the ultrastructure and eight species were first mentioned for the State.