Genetic variability of Euglena agilis (Euglenophyceae)

Zakryś, Bożena; Empel, Joanna; Milanowski, Rafał; Gromadka, Robert; Borsuk, Piotr; Kędzior, Marta; Kwiatkowski, Jan

doi:10.5586/asbp.2004.039

Cited by 18 publications

(8 citation statements)

References 17 publications

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“…Water bodies of this size are mostly eutrophic and macrophyte dominated. These lakes provide ideal habitats for euglenoids that prefer small-scale spatial heterogeneity in the resources (Zakrys et al, 2004). These species frequently dominate in this kind of waters (Borics, Görgényi et al, 2014;Borics, Lukács et al, 2014) and establish diverse assemblages, therefore can be considered as typical pond-dwellers.…”

Section: Discussionmentioning

confidence: 99%

Functional redundancy modifies species–area relationship for freshwater phytoplankton

Várbíró

Görgényi

Tóthmérész³

et al. 2017

Ecology and Evolution

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Although species–area relationship (SAR) is among the most extensively studied patterns in ecology, studies on aquatic and/or microbial systems are seriously underrepresented in the literature. We tested the algal SAR in lakes, pools and ponds of various sizes (10−2–108 m2) and similar hydromorphological and trophic characteristics using species‐specific data and functional groups. Besides the expectation that species richness increases monotonously with area, we found a right‐skewed hump‐shaped relationship between the area and phytoplankton species richness. Functional richness however did not show such distortion. Differences between the area dependence of species and functional richness indicate that functional redundancy is responsible for the unusual hump‐backed SAR. We demonstrated that the Small Island Effect, which is a characteristic for macroscopic SARs can also be observed for the phytoplankton. Our results imply a so‐called large lake effect, which means that in case of large lakes, wind‐induced mixing acts strongly against the habitat diversity and development of phytoplankton patchiness and finally results in lower phytoplankton species richness in the pelagial. High functional redundancy of the groups that prefer small‐scale heterogeneity of the habitats is responsible for the unusual humpback relationship. The results lead us to conclude that although the mechanisms that regulate the richness of both microbial communities and communities of macroscopic organisms are similar, their importance can be different in micro‐ and macroscales.

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Section: Discussionmentioning

confidence: 99%

Functional redundancy modifies species–area relationship for freshwater phytoplankton

Várbíró

Görgényi

Tóthmérész³

et al. 2017

Ecology and Evolution

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“…The last 10 years have seen much taxonomic reclassification of these organisms, based on morphological and molecular data. As a result, the number of previously recognized species has been greatly reduced (Zakryś, 1997;Zakryś et al, 1997Zakryś et al, , 2002Zakryś et al, , 2004Shin & Triemer, 2004;Kosmala et al, 2005Kosmala et al, , 2007aKosmala et al, , 2007bKosmala et al, , 2009Karnkowska-Ishikawa et al, 2010, 2011, 2013 and some new species have been described based solely on molecular data (Kosmala et al, 2007a(Kosmala et al, , 2009. Among the green euglenoids, as is the case with many other groups of organisms, it has become increasingly difficult to find a new species that is clearly distinct morphologically.…”

Section: Introductionmentioning

confidence: 99%

A new photosynthetic euglenoid isolated in Poland: Euglenaria clepsydroides sp. nov. (Euglenea)

Zakryś

Karnkowska

Łukomska‐Kowalczyk

et al. 2013

European Journal of Phycology

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In this paper, we describe a new photosynthetic euglenoid species, Euglenaria clepsydroides Zakryś, sp. nov., found in Poland. A large population of this species exists in a few, small, eutrophic bodies of water inside the Masurian Landscape Park (covering a part of the Masurian Lake District in Poland). The characteristic and atypical (hourglass-like) cell shape sets it well apart from the other species that have been described up to now. This atypical cell shape has so far been observed only in three speciesLepocinclis constricta, Euglena undulata and Euglena gymnodinioides -whose other morphological characteristics, such as the number and morphology of chloroplasts, the lack of mucocysts, and nuclear SSU rDNA sequence data, exclude the possibility that they could be close relatives of Euglenaria clepsydroides. On the phylogenetic tree, the new species is situated within the Euglenaria clade. While it is a sister group of the clade that includes representatives of Euglenaria anabaena, the two species are clearly morphologically distinct.

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“…It is well known that photosynthetic euglenoids, especially Euglena species with stellate chloroplasts, have high genetic variability, but are not differentiated clearly by morphological criteria (Marin et al 2003, Shin and Triemer 2004, Zakryś et al 2004, Triemer et al 2006, Kosmala et al 2007a,b, 2009, Linton et al 2010. Intraspecific genetic divergence of the nr SSU rDNA in the genus Euglena ranged from 4.8% (Euglena chadefaudii) to 2.0% (E. geniculata), but interspecies divergence ranged from 7.6% (between E. geniculata and E. pseudochadefaudii) to 5.9% (between E. pseudostellata and E. viridis; Kosmala et al 2009).…”

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confidence: 99%

Phylogenetic Reappraisal of the Genus Monomorphina (Euglenophyceae) Based on Molecular and Morphological Data

Kim

Shin

Triemer

2012

Journal of Phycology

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A morphological and molecular examination of the genus Monomorphina was conducted on 46 strains isolated mainly from Korea. The strains were divided into two types based on morphological data: Monomorphina aenigmatica and M. pyrum - like species. Phylogenetic analysis based on a combined data set of nuclear SSU and LSU and plastid SSU and LSU rDNA showed that the strains could be divided into eight clades: Clade A of M. aenigmatica, Clade B of the isolates (M. pyropsis) from Michigan, USA, Clade C of M. pseudopyrum, Clade D of the isolates (M. pyroria) from Bremen, Germany, Clade E of M. soropyrum, Clade F of M. pyriformis, Clade G of M. parapyrum, and Clade H of M. pyrum. Six of these clades came from strains that would be considered M. pyrum sensu Kosmala et Zakryś, one of which could be recognized as a traditional species (M. pyrum) and five were designated as new species; each species had unique molecular signatures at nr SSU rDNA helix 17 and 17' and spacer E23_14'-E23_15. The species of Monomorphina had a wide range of genetic diversity with interspecies sequence similarity of 85.6%-97.1% and intraspecies similarity of 96.4%-99.9%. Our results suggested that genetic diversity found in the M. pyrum complex justifies the recognition of a minimum of eight species within this genus, based on specific molecular signatures and gene divergence of the nr SSU rDNA sequences.

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Genetic variability of Euglena agilis (Euglenophyceae)

Cited by 18 publications

References 17 publications

Functional redundancy modifies species–area relationship for freshwater phytoplankton

Functional redundancy modifies species–area relationship for freshwater phytoplankton

A new photosynthetic euglenoid isolated in Poland: Euglenaria clepsydroides sp. nov. (Euglenea)

Phylogenetic Reappraisal of the Genus Monomorphina (Euglenophyceae) Based on Molecular and Morphological Data

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