First report of genus Chroococcidiopsis (cyanobacteria) from Sri Lanka: a potential threat to human health

Magana-Arachchi, Dhammika; Wanigatunge, R.P.

doi:10.4038/jnsfsr.v41i1.5334

Cited by 8 publications

(6 citation statements)

References 5 publications

(2 reference statements)

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“…However there were no previous records about this genus from Sri Lanka except one record [49] or could have been misidentified as different genera or was unexamined.…”

Section: Identification Of Cyanobacterial Isolates Using 16s Rrna Genementioning

confidence: 99%

Genetic Diversity and Molecular Phylogeny of Cyanobacteria from Sri Lanka Based on 16S rRNA Gene

Wanigatunge

Magana-Arachchi

Chandrasekharan

et al. 2014

Environmental Engineering Research

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The diversity of cyanobacteria in Sri Lanka was studied in different water reservoirs, paddy fields, brackish water and tsunami affected areas using light microcopy, 16S rRNA sequences, followed by phylogenetic analysis. Based on light microscopy, 24 genera were identified from environmental samples belonging to the orders Chroococcales, Oscillatoriales, Pleurocapsales and Nostocales. In cultures, 33 genera were identified from all five cyanobacterial orders, including Stigonematales. Based on 16S rRNA gene sequences and their morphology, two isolates were identified up to species level, 72 to genus level, one isolate up to family and 11 up to order level. Twelve isolates couldn't be assigned to any taxonomic level. The results of 16S rRNA gene sequences along with the phylogenetic analysis indicated that some cyanobacterial isolates could be accommodated to genus or order level. The 16S rRNA sequence analysis data in this study confirmed that order Nostocales and order Pleurocapsales cyanobacteria are monophyletic while orders Chroococcales, Oscillatoriales and Stigonematales cyanobacteria are polyphyletic. Polyphasic approach including the combination of light microscopy, cultures and the analysis of 16S rRNA gene sequences provide a promising approach to ascertain the diversity of cyanobacteria in different habitats.

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“…However there were no previous records about this genus from Sri Lanka except one record [49] or could have been misidentified as different genera or was unexamined.…”

Section: Identification Of Cyanobacterial Isolates Using 16s Rrna Genementioning

confidence: 99%

Genetic Diversity and Molecular Phylogeny of Cyanobacteria from Sri Lanka Based on 16S rRNA Gene

Wanigatunge

Magana-Arachchi

Chandrasekharan

et al. 2014

Environmental Engineering Research

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“…Presence of taxa affiliated to Chroococcales (27%), Oscillatoriales, Pleurocapsales and Nostocales was reported previously by Wagacha et al (2014), although their study relied on microscopical techniques. Chroococcidiopsis species are known for their ability to tolerate a diverse array of high conditions of salinity, extreme high temperatures or pH, high levels of radiation, conductivity and alkalinity (Magana-Arachchi and Wanigatunge, 2013). In this study thus taxon was represented by C2, C4, C5, C13 and C16.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic and morphological diversity of culturable cyanobacteria from Lake Magadi in Kenya

Edwin¹,

Akhwale²,

Mwirichia³

2019

afjbs

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Lake Magadi is an alkaline saline Lake in Kenya, which lies on the Great Eastern Rift valley. Although the lake is characterized by extremes of salt, pH and temperature, it supports diverse groups of cyanobacteria. In this study, we used different media to isolate novel groups of cyanobacteria. We recovered 11 isolates affiliated to the orders Chroococcales, Oscillatoriales, Pleurocapsales and Nostocales. Isolates affiliated to Chroococcidiopsis species had similarity values below 90% to currently characterized taxa indicating that these could be completely new phylotypes. This taxon has not been isolated before from the soda lake indicating the power of molecular techniques in identifying novel cyanobacterial taxa. Only two of the recovered isolates had 99% similarity to known organisms. Previous studies have mainly relied on microscopic examination and identification, which can lead to misidentification and subsequent assignment of an organism to the wrong taxon. The recovered isolates are a useful resource of more studies on taxonomy and secondary metabolite production.

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“…According to the standard identification keys, many of the isolates recovered in this study were identified as Chroococcidiopsis and Cylindrospermopsis isolates through microscopic observations ( Figure 5). Magana-Arachchi and Wanigatunge [22] also disclosed the prevalence of the genus Chroococcidiopsis in dry zone waters in Sri Lanka.…”

Section: Space-time Dynamics Of Cyanobacteriamentioning

confidence: 94%

Spatial and Temporal Dynamics and Parameters of Growth of Toxic Cyanobacteria in Nuwara Wewa and Nachchaduwa Wewa in Sri Lanka

Zakeel¹,

Weerasinghe²,

Kumari³

et al. 2015

AJEP

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Cyanobacterial toxins available in drinking water pose a major health problem to humans and animals. Nuwara wewa and Nachchaduwa wewa are two important reservoirs supplying water for domestic purposes in Anuradhapura, Sri Lanka. As cyanobacterial toxins are resistant to deactivation by heat, it is important to control the proliferation of cyanobacteria in these reservoirs. Therefore, making an inventory of cyanobacterial variations with respect to time and space is imperative. Distinct temporal variations of temperature, pH, turbidity, dissolved oxygen and cyanobacteria density were observed in both reservoirs. Strong positive correlations existed between the above physico-chemical parameters of water and the cyanobacterial density in both reservoirs. These parameters can therefore be used as good indicators to assess the status these reservoirs with respect to cyanobacterial density and distribution.

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First report of genus Chroococcidiopsis (cyanobacteria) from Sri Lanka: a potential threat to human health

Cited by 8 publications

References 5 publications

Genetic Diversity and Molecular Phylogeny of Cyanobacteria from Sri Lanka Based on 16S rRNA Gene

Genetic Diversity and Molecular Phylogeny of Cyanobacteria from Sri Lanka Based on 16S rRNA Gene

Phylogenetic and morphological diversity of culturable cyanobacteria from Lake Magadi in Kenya

Spatial and Temporal Dynamics and Parameters of Growth of Toxic Cyanobacteria in Nuwara Wewa and Nachchaduwa Wewa in Sri Lanka

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