Phenotype diversity and phylogeny of selected Scytonema-species (Cyanoprokaryota) from SE Brazil.

Komárek, Jiří; Anna, Célia Leite Sant'; Bohunická, Markéta; Mareš, Jan; Hentschke, Guilherme Scotta; Rigonato, Janaína; Fiore, Marli Fátima

doi:10.5507/fot.2013.015

Cited by 37 publications

(26 citation statements)

References 24 publications

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“…Synechococcus sensu lato is a group of cyanobacteria with cosmopolitan distribution inhabiting almost all environments (Komárek and Anagnostidis 1998), including thermal and aerophytic habitats (Honda et al 1999;Robertson et al 2001). Although some cyanobacteria, such as Synechococcus sensu lato, lack phenotypic variability, great ecological and genetic diversity suggest that polyphyletic complexes of cryptic taxa might exist (Honda et al 1999;Robertson et al 2001;Dvořák et al 2014a, b).…”

Section: Particular Problems Of Species Definitions and Concepts In Cmentioning

confidence: 99%

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Species concepts and speciation factors in cyanobacteria, with connection to the problems of diversity and classification

et al. 2015

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The cyanobacteria are the most important prokaryotic primary producers on Earth, inhabiting a great diversity of aquatic and terrestrial environments exposed to light. However, the evolutionary forces leading to their divergence and speciation remain largely enigmatic compared to macroorganisms due to their prokaryotic nature, including vast population sizes, and largely asexual reproduction. The advent of modern molecular techniques has facilitated an understanding of the important factors shaping cyanobacterial evolution, including horizontal gene transfer and homologous recombination. We review the forces shaping the evolution of cyanobacteria and discuss the role of cohesive forces on speciation. Further, while myriad species concepts and definitions are currently used, only a limited subset might be applied to cyanobacteria due to their asexual reproduction. Additionally, concepts based solely on phenotypes provide insufficient resolution. A monophyletic species concept which is universal may be ideal for cyanobacteria. Actual identification of the cyanobacteria is difficult due to cryptic diversity, lack of morphological variability, and frequent convergent evolutionary events. Thus, applied molecular techniques such as DNA barcoding will be useful for identifications of environmental samples. Lastly, we show that the real biodiversity of the cyanobacteria is widely underestimated, due in part to low sampling efforts, sensitivity to the molecular markers 123Biodivers Conserv (2015) 24:739-757 DOI 10.1007 employed, and the species definitions employed by researchers. In conclusion, we anticipate a rapid increase in cyanobacterial taxa described and large revisions of the system in the future as scientists adopt a common approach to cyanobacterial systematics.

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Section: Particular Problems Of Species Definitions and Concepts In Cmentioning

confidence: 99%

“…see Komárek 2010 for review of older works, afterwards e.g. Strunecký et al 2011;Komárek et al 2013;Komárková et al 2013;Dvořák et al 2014a). During the 19th Symposium of the International Society for Cyanophyte Research in 2013, 16 new genera were presented .…”

Section: Estimate Of the Total Cyanobacterial Biodiversitymentioning

confidence: 99%

Species concepts and speciation factors in cyanobacteria, with connection to the problems of diversity and classification

et al. 2015

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“…Las cepas identificadas mediante la observación de características morfológicas se localizan entre las cianobacterias pertenecientes al orden Nostocales (Komarek et al, 2014). Hasta el momento, existen algunos hallazgos científicos que tratan sobre la taxonomía y la filogenia de algunos géneros particulares pertenecientes al orden abordado en nuestro estudio, dichos estudios demuestran que la clasificación tradicional debe ser revisada (Rajaniemi et al 2005).…”

Section: Discussionunclassified

“…Dentro del género Scytonema, sus especies son consideradas cosmopolitas, creciendo en hábitats tropicales y subtropicales. Un ejemplo de ello son los suelos lateríticos, rocas y reservorios de vegetación de agua (Sant'Anna et al, 2011;Komarek et al, 2014). Especies del género Tolipothrix se distribuyen en hábitats hipolíticos y endolíticos, como en campos agrí-colas de Sur América (Quesada & Vincent, 2012;Silva & de Jesús, 2013).…”

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Identificación y caracterización molecular de cianobacterias tropicales de los géneros Nostoc, Calothrix, Tolypothrix y Scytonema (Nostocales: Nostocaceae), con posible potencial biotecnológico

Morales¹,

Villalobos²,

Rodríguez³

et al. 2017

URJ

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Identification and molecular characterization of tropical cyanobacteria of the genus Nostoc, Calothrix, Tolypothrix and Scytonema (Nostocales: Nostocaceae), with possible biotechnological potential. Cyanobacteria or "Blue-Green" algae comprise a diverse cluster of prokaryotic photoautotrophs that share a high morphological and molecular abundance. Biotechnological advances on nitrogen fixation, bioremediation, pharmaceutical and nutritional value have been developed. Traditional identification based on morphology has been the most common applied technique, but it may be inaccurate because of the phenotypic plasticity that those organisms present. For this reason, molecular techniques had become robust tools for taxonomic positioning of tropical cyanobacterial isolates, associated with morphology identification. This study focuses on the morphological identification and molecular characterization of cyanobacteria isolated in different tropical environments of Costa Rica, for biotechnological prospects. Strains were grown in BG 0 -11 media, photographed under light microscope and classified at genera level. Molecular identification was carried by PCR and sequencing using DNA-dependent RNA polymerase (rpoC1) and small-subunit ribosomal RNA (16S rRNA) gen primers. Subsequently, a phylogenetic positioning analysis was performed by MAFFTv.7 alignment and maximum likelihood by raxMLGUI. Based on phenotypic characteristics, four genera of Nostocales were identified: Calothrix sp., Tolypothrix sp., Scytonema sp. and Nostoc sp. Molecular analysis shows a taxonomic grouping that is consistent with the observed morphology, with the 16S rDNA gene yielding robust and stable results. The identified genera are known for their nitrogen fixation capability: Nostoc and Calothrix have been used in maintaining fertility and soil recovering studies. Nostoc is known for its nutritional properties and biofuel production; a characteristic shared by Tolypothrix as well. The last genera; Scytonema, it is known for its pharmacological properties. With the successful identification of cyanobacteria strains isolated from tropical environments, it is possible to continue the study of genes responsible for properties of biotechnological interest and to evaluate their potential, with future perspectives of application and biodiversity conservation.Key words: Cyanobacteria, 16S rRNA, rpoC1, characterization molecular, morphological identification, biotechnological potential. RESUMEN:Las cianobacterias son procariotas fotoautótrofos, morfoló-gica y molecularmente diversas, en las cuales se han reportado avances biotecnológicos sobre fijación de nitrógeno, biorremediación y valor nutricional-farmacéutico. La identificación tradicional de cianobacterias basada en morfología puede ser imprecisa, por lo que las técnicas moleculares son una herramienta robusta para el posicionamiento taxonómico de estas cepas tropicales. Este estudio se enfoca en la identificación morfológica y caracterización molecular de cianobacterias de ambientes tropica...

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“…These microorganisms become more populous because they are capable of forming massive growth of blooms with adverse effects on sanitation, which are aggravated when toxic cyanobacterial species are present [9]. However, the knowledge of their morphological variability (important for their identification) is still little known, which requires a thorough revision [10].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Diversity of Cyanobacteria in Periphyton from Lentic Tropical Ecosystem, Brazil

Felisberto¹,

Souza²

2014

AiM

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This study aimed to perform the taxonomic survey of the species of periphytic Cyanobacteria in a lentic tropical environment, seeking to contribute to the knowledge on biodiversity and their distribution. This study was conducted at the Samambaia Reservoir, which is located at Federal University of Goiás, Goiânia, Central West region of Brazil. In general, the water of the Samambaia Reservoir is characterized as more turbid and the increased biochemical oxygen demand as well as a higher concentration of coliforms in the rainy season. Twenty six samples were collected, ten in the dry season (09/2010 and 11/2010; 07/2012) and ten in the rainy season (01/2011 and 03/2011; 01/2013). Periphyton was collected from stems of aquatic plants (Cyperaceae), which were in the marginal area of the reservoir. With the floristic survey, 38 taxa of Cyanobacteria were identified in periphyton of the Samambaia Reservoir. Phormidium (family Phormidiaceae) and Aphanocapsa (Merismopediaceae) are among genera with the highest species richness. Regarding morphological types, many species of filamentous cyanobacteria were identified, followed by colonial taxa. In relation to the frequency of occurrence and the seasonal period, 14 taxa were classified in the rare category, 12 in common category and 12 in constant category. Regarding the seasonal period, Cyanophyceae were the greatest wealth in the rainy season (97.4%).

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Phenotype diversity and phylogeny of selected Scytonema-species (Cyanoprokaryota) from SE Brazil.

Cited by 37 publications

References 24 publications

Species concepts and speciation factors in cyanobacteria, with connection to the problems of diversity and classification

Species concepts and speciation factors in cyanobacteria, with connection to the problems of diversity and classification

Identificación y caracterización molecular de cianobacterias tropicales de los géneros Nostoc, Calothrix, Tolypothrix y Scytonema (Nostocales: Nostocaceae), con posible potencial biotecnológico

Characteristics and Diversity of Cyanobacteria in Periphyton from Lentic Tropical Ecosystem, Brazil

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