Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/14424
Citations | ||
Scopus | Web of ScienceĀ® | Altmetric |
---|---|---|
?
|
?
|
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hawkins, P. | - |
dc.contributor.author | Putt, E. | - |
dc.contributor.author | Falconer, I. | - |
dc.contributor.author | Humpage, A. | - |
dc.date.issued | 2001 | - |
dc.identifier.citation | Environmental Toxicology, 2001; 16(6 Special Issue SI):460-467 | - |
dc.identifier.issn | 1520-4081 | - |
dc.identifier.issn | 1522-7278 | - |
dc.identifier.uri | http://hdl.handle.net/2440/14424 | - |
dc.description.abstract | A nonaxenic strain of Cylindrospermopsis raciborskii Woloszynska (AWT 205) was grown in batch culture, with and without nitrate as the primary N source. Rapid log-phase growth with nitrate was 1.0 doubling/day versus 0.3 doubling/day without nitrate. Cylindrospermopsin (CYN) production was measured by HPLC. The rate of intracellular CYN production matched cell division rate for both the diazotrophies at cell densities less than 10(7) cell/ml. At cell density > 10(7) cell/ml, additional resource limitation in batch culture slowed log-phase growth to 0.04 division/day and cell division and CYN production decoupled. Intracellular CYN concentration increased at a rate of 0.08 doubling/day, twice the cell division rate. Extracellular CYN as a proportion of the total CYN increased from 20% during the rapid growth phase, to 50% during the slow growth phase. The total CYN yield from cultures grown out to stationary phase (55 days) exceeded 2 mg CYN/I. C. raciborskii cells in log-phase growth, exposed to 1 ppm copper (as copper sulphate), lysed within 24 hours. After copper treatment, all CYN was in the filterable fraction. These findings imply that in naturally occurring blooms of C. raciborskii, the movement of intracellular CYN into solution will be the greatest during stationary phase, when intracellular concentrations are highest and cell lysis is more frequent. The application of algicides that promote cell lysis will exacerbate this effect. | - |
dc.language.iso | en | - |
dc.publisher | John Wiley & Sons Inc | - |
dc.source.uri | http://dx.doi.org/10.1002/tox.10005 | - |
dc.subject | Cell Surface Extensions | - |
dc.subject | Humans | - |
dc.subject | Cyanobacteria | - |
dc.subject | Nitrates | - |
dc.subject | Copper Sulfate | - |
dc.subject | Alkaloids | - |
dc.subject | Uracil | - |
dc.subject | Bacterial Toxins | - |
dc.subject | Filtration | - |
dc.subject | Cell Division | - |
dc.subject | Time Factors | - |
dc.subject | Cyanobacteria Toxins | - |
dc.title | Phenotypical variation in a toxic strain of the phytoplankter, Cylindrospermopsis raciborskii (Nostocales, Cyanophyceae) during batch culture | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1002/tox.10005 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Falconer, I. [0000-0002-1444-2681] | - |
Appears in Collections: | Aurora harvest 2 Environment Institute publications Pharmacology publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.