A detailed morphological, phylogenetic and ecophysiological analysis of four benthic Anabaena (Nostocales, Cyanobacteria) strains confirms deep heterogeneity within the genus

Kust, Andreja; Kozlíková–Zapomělová, Eliška; Mareš, Jan; Řeháková, Klára

doi:10.5507/fot.2015.019

Cited by 10 publications

(4 citation statements)

References 55 publications

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“…produce akinetes. Several genera, Anabaena, Trichormus and Wollea, are arguably polyphyletic, and partial taxonomic revision in these genera involved combination and separation among some taxa (Rajaniemi et al 2005a;Kozhevnikov & Kozhevnikova 2011, Kust et al 2015Kust et al 2018). Nostoc, the type genus of this family, is probably the most problematic one since it contains complicated and widely distributed cyanobacterial types.…”

Section: Resultsmentioning

confidence: 99%

Phylogenetically distant clade of Nostoc-like taxa with the description of Minunostoc gen. nov. and Minunostoc cylindricum sp. nov

Cai¹,

Li²,

Geng³

et al. 2019

Fottea

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Two cyanobacterial strains morphologically identified to the genus Nostoc were isolated from a wet rocky wall in a mid-subtropical region in China, and they were taxonomically and phylogenetically characterized based on the polyphasic approach combining morphological and genetic characteristics. 16S rRNA gene sequence analysis showed that the two strains containing six clones were all >99.6% similar to each other, but had < 94.3% similarities to the existing cyanobacterial genera. The phylogenies based on 16S rRNA and rpoC1 gene sequences indicated that their sequences grouped into a unique and robust cluster with high bootstrap values. This unique cluster was separated from the clade of the 'Nostoc sensu stricto' and the respective clades formed by the morphologically similar genera Mojavia, Desmonostoc, Aliinostoc, Komarekiella and Halotia. The 16S-23S rRNA ITS secondary structure of the both strains exhibited the unique pattern of D1-D1´, Box-B and V3 helix, distinguishing it from the other heterocytous genera. Such a clear cluster leads to the establishment of Minunostoc gen. nov., with the type species as Minunostoc cylindricum sp. nov.

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Section: Resultsmentioning

confidence: 99%

Phylogenetically distant clade of Nostoc-like taxa with the description of Minunostoc gen. nov. and Minunostoc cylindricum sp. nov

Cai¹,

Li²,

Geng³

et al. 2019

Fottea

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“…Substantial ecophysiological differences occur within species (ecotypes; see e.g. Piccini et al, 2011;Miotto et al, 2017), and within species of the same genera (Kust et al, 2015;Lengyel et al, 2020)-all belonging to the same functional group. Minor differences between ecophysiological tolerance levels may basically determine dispersal opportunities (Lengyel et al, 2020) or even competition between species of different functional groups can be strain dependent (Marinho et al, 2013).…”

Section: Food Websmentioning

confidence: 99%

Phytoplankton in extreme environments: importance and consequences of habitat permanency

Padisák

Naselli-Flores

2020

Hydrobiologia

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There is hardly any sunshine exposed surface on this Earth, be it water or terrain, which would not support some biota. Still, many habitats offer harsh conditions requiring specialized physiological adaptations to survive. These environments are referred to as extremes; often inhabited by extremophilic organisms. In this review, characteristic species and assemblage properties of phytoplankton inhabiting extreme environments (especially lakes and pools where planktic life is potentially possible and independently of their origin) in terms of alkalinity, acidity, DOC, salinity, temperature, light and mixing regime will be outlined. Lakes characterized by more than a single extreme are common (e.g. saline + alkaline; acidic + high DOC + high metal content + low light). At the edge of extremes (e.g. pH of 1; salinity over ~ 100–150 g l−1) single species with appropriate physiological adaptation are selected and the phytoplankton is often dominated by a single species (monodominant) setting compositional diversity to zero. Under less extreme conditions permanent equilibria may persist; in many cases over several years in contrast to „average” lakes where equilibria are rare and ephemeral. Food webs depending on „extreme phytoplankton” are often atypical for example because the microbial loop is of prior importance or because birds are top predators.

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“…According to this author, data about benthic population are very scarce. Kust et al (2015) mentioned that Anabaena is very complex and possibly should be split into several new monophyletic taxa, which could cover distinct morphoand ecotypes. Thus, morphological and ecological features of this population suggest that it can be a new species to science.…”

Section: Oscillatoriales -Family Coleofasciculaceaementioning

confidence: 99%

Biodiversity of benthic filamentous cyanobacteria in tropical marine environments of Bahia State, Northeastern Brazil

2019

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This study aimed to better understand the biodiversity and ecological aspects of benthic filamentous cyanobacteria along the coast of an extensive Brazilian tropical region with underestimated biodiversity. We collected samples between 2010 and 2012 in 24 areas along the coast of the State of Bahia, Northeastern Brazil. We analyzed biodiversity, life form, and spatial distribution of filamentous cyanobacteria on various marine substrata. The intertidal area was divided into three microhabitats according to hydrodynamics: tidal pools, protected reef region, and front reef region. Thirty-two taxa were identified and Oscillatoriales showed the highest biodiversity (16 taxa), followed by Nostocales (9), Synechoccocales (5) and Spirulinales (2). We reported 22 new references to Bahia State. Twenty-two taxa occurred only in one beach, and Symploca cf. hydnoides Gomont was the only widely distributed along the coast of Bahia. Epilithic (21 taxa) and epiphytic (15) showed the greatest species richness. Only two species presented epizoic life form. We observed the highest species richness in the protected reef region (17 taxa). We found eleven and eight taxa in the tidal pool and supralittoral zone, respectively. No cyanobacteria were found in the front reef region, an area with high hydrodynamics. This research presented many taxa in common with previous studies on cyanobacterial diversity developed in other tropical regions around the globe. The great biodiversity and new records reported in this study highlight the need of further surveys in tropical coastal environments, areas still underexplored in terms of biodiversity of cyanobacteria.

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A detailed morphological, phylogenetic and ecophysiological analysis of four benthic Anabaena (Nostocales, Cyanobacteria) strains confirms deep heterogeneity within the genus

Cited by 10 publications

References 55 publications

Phylogenetically distant clade of Nostoc-like taxa with the description of Minunostoc gen. nov. and Minunostoc cylindricum sp. nov

Phylogenetically distant clade of Nostoc-like taxa with the description of Minunostoc gen. nov. and Minunostoc cylindricum sp. nov

Phytoplankton in extreme environments: importance and consequences of habitat permanency

Biodiversity of benthic filamentous cyanobacteria in tropical marine environments of Bahia State, Northeastern Brazil

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