The influence of light quality on akinete formation and germination in the toxic cyanobacterium Anabaena circinalis

Harmful Algae ◽  
2009 ◽  
Vol 8 (3) ◽  
pp. 504-512 ◽  
Author(s):  
Peter A. Thompson ◽  
Ian Jameson ◽  
Susan I. Blackburn
Keyword(s):  
Light Quality ◽  
Toxic Cyanobacterium ◽  
Akinete Formation ◽  
Cyanobacterium Anabaena ◽  
Anabaena Circinalis

Akinete Germination and Algal Growth Potential Test of Cyanobacterium Anabaena circinalis on Different Waters in Lake Paldang

2015 ◽  
Vol 48 (4) ◽  
pp. 287-295 ◽  
Author(s):  
Myung-Hwan Park ◽  
Byung-Jin Lim ◽  
Wan-Bum Seo ◽  
Chae-Hong Park ◽  
Keon-Hee Kim ◽  
...  
Keyword(s):  
Algal Growth ◽  
Growth Potential ◽  
Algal Growth Potential ◽  
Cyanobacterium Anabaena ◽  
Potential Test ◽  
Anabaena Circinalis

scholarly journals Identification of an Na+-Dependent Transporter Associated with Saxitoxin-Producing Strains of the Cyanobacterium Anabaena circinalis

2004 ◽  
Vol 70 (8) ◽  
pp. 4711-4719 ◽  
Author(s):  
Francesco Pomati ◽  
Brendan P. Burns ◽  
Brett A. Neilan
Keyword(s):  
Genomic Structure ◽  
Repeated Sequence ◽  
Subtractive Hybridization ◽  
Molecular Probe ◽  
Ph Homeostasis ◽  
Important Health ◽  
Cyanobacterium Anabaena ◽  
Specific Sequences ◽  
Anabaena Circinalis

ABSTRACT Blooms of the freshwater cyanobacterium Anabaena circinalis are recognized as an important health risk worldwide due to the production of a range of toxins such as saxitoxin (STX) and its derivatives. In this study we used HIP1 octameric-palindrome repeated-sequence PCR to compare the genomic structure of phylogenetically similar Australian isolates of A. circinalis. STX-producing and nontoxic cyanobacterial strains showed different HIP1 (highly iterated octameric palindrome 1) DNA patterns, and characteristic interrepeat amplicons for each group were identified. Suppression subtractive hybridization (SSH) was performed using HIP1 PCR-generated libraries to further identify toxic-strain-specific genes. An STX-producing strain and a nontoxic strain of A. circinalis were chosen as testers in two distinct experiments. The two categories of SSH putative tester-specific sequences were characterized by different families of encoded proteins that may be representative of the differences in metabolism between STX-producing and nontoxic A. circinalis strains. DNA-microarray hybridization and genomic screening revealed a toxic-strain-specific HIP1 fragment coding for a putative Na+-dependent transporter. Analysis of this gene demonstrated analogy to the mrpF gene of Bacillus subtilis, whose encoded protein is involved in Na+-specific pH homeostasis. The application of this gene as a molecular probe in laboratory and environmental screening for STX-producing A. circinalis strains was demonstrated. The possible role of this putative Na+-dependent transporter in the toxic cyanobacterial phenotype is also discussed, in light of recent physiological studies of STX-producing cyanobacteria.

EXPRESSION OF THE GEOSMIN SYNTHASE GENE IN THE CYANOBACTERIUM ANABAENA CIRCINALIS AWQC3181

2011 ◽  
Vol 47 (6) ◽  
pp. 1338-1343 ◽  
Author(s):  
Steven Giglio ◽  
Christopher P. Saint ◽  
Paul T. Monis
Keyword(s):  
Cyanobacterium Anabaena ◽  
Anabaena Circinalis

Sheep mortality associated with paralytic shellfish poisons from the cyanobacterium Anabaena circinalis

Toxicon ◽  
1995 ◽  
Vol 33 (10) ◽  
pp. 1321-1329 ◽  
Author(s):  
Andrew P Negri ◽  
Gary J Jones ◽  
Michael Hindmarsh
Keyword(s):  
Paralytic Shellfish ◽  
Cyanobacterium Anabaena ◽  
Anabaena Circinalis

scholarly journals Optimising water treatment practices for the removal of Anabaena circinalis and its associated metabolites, geosmin and saxitoxins

2009 ◽  
Vol 7 (4) ◽  
pp. 544-556 ◽  
Author(s):  
Lionel Ho ◽  
Paul Tanis-Plant ◽  
Nawal Kayal ◽  
Najwa Slyman ◽  
Gayle Newcombe
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Treatment ◽  
Treatment Practices ◽  
Water Treatment Plants ◽  
Cyanobacterium Anabaena ◽  
Pertinent Information ◽  
Equivalent Conditions ◽  
Anabaena Circinalis

The cyanobacterium Anabaena circinalis has the ability to co-produce geosmin and saxitoxins, compounds which can compromise the quality of drinking water. This study provides pertinent information in optimising water treatment practices for the removal of geosmin and saxitoxins. In particular, it demonstrates that pre-oxidation using potassium permanganate could be applied at the head of water treatment plants without releasing intracellular geosmin and saxitoxins from A. circinalis. Furthermore, powdered activated carbon (PAC) was shown to be an effective treatment barrier for the removal of extracellular (dissolved) geosmin and saxitoxins, with similar adsorption trends of both compounds. The relative removal of the saxitoxins compared with geosmin was determined to be 0.84±0.27, which implies that saxitoxin removal with PAC can be estimated to be approximately 60 to 100% of the removal of geosmin under equivalent conditions. Chlorine was shown to be effective for the oxidation of the saxitoxins with CT values of approximately 30 mg min l−1 required for greater than 90% destruction of the saxitoxins.

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