Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam
A clonal culture of a Vietnamese strain of Alexandrium minutum, AlexSp17, was subjected to different salinity treatments to determine the growth and toxin production of this strain that produces a novel toxin analogue, deoxy GTX4-12ol. The experiment was carried out in batch cultures without pre-acc...
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| Language: | English |
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Springer Netherlands
2011
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| Online Access: | http://ir.unimas.my/id/eprint/3336/ http://ir.unimas.my/id/eprint/3336/1/Effect%20of%20salinity.pdf |
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| author | Po, Teen Lim Chui, P.L Sato, S. Chu, V.T Kobiyama, A. Ogata, T. |
| author_facet | Po, Teen Lim Chui, P.L Sato, S. Chu, V.T Kobiyama, A. Ogata, T. |
| author_sort | Po, Teen Lim |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | A clonal culture of a Vietnamese strain of Alexandrium minutum, AlexSp17, was subjected to different salinity treatments to determine the growth and toxin production of this strain that produces a novel toxin analogue, deoxy GTX4-12ol. The experiment was carried out in batch cultures without pre-acclimatization at seven salinity treatments from 5 to 35 psu, under constant temperature of 25°C, illumination of 140 μmol photon m−2 s−1, and 12:12 light/dark photoperiod. The strain grew in all salinity treatments, with optimum growth at 10–15 psu. However, the specific growth rate (0.2 day−1) was lower than those reported in Malaysian strains and other strains from different geographical areas. The optimum range of salinity for the growth of this species agreed with field observations of the locality of origin. No significant change in toxin profiles was observed at different salinities. The cellular toxin quota, Qt, was not affected by the salinity-dependent growth rate. The toxin GTX4-12ol is presumed to be a transformation product of GTX4 from specific cellular reductase enzymes. Further investigation at the molecular level of toxin biosynthesis and subcellular enzyme activities is needed to provide insight in the production of this unique toxin analogue. |
| first_indexed | 2025-11-15T06:03:56Z |
| format | Article |
| id | unimas-3336 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T06:03:56Z |
| publishDate | 2011 |
| publisher | Springer Netherlands |
| recordtype | eprints |
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| spelling | unimas-33362022-03-23T07:15:48Z http://ir.unimas.my/id/eprint/3336/ Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam Po, Teen Lim Chui, P.L Sato, S. Chu, V.T Kobiyama, A. Ogata, T. G Geography (General) GE Environmental Sciences Q Science (General) A clonal culture of a Vietnamese strain of Alexandrium minutum, AlexSp17, was subjected to different salinity treatments to determine the growth and toxin production of this strain that produces a novel toxin analogue, deoxy GTX4-12ol. The experiment was carried out in batch cultures without pre-acclimatization at seven salinity treatments from 5 to 35 psu, under constant temperature of 25°C, illumination of 140 μmol photon m−2 s−1, and 12:12 light/dark photoperiod. The strain grew in all salinity treatments, with optimum growth at 10–15 psu. However, the specific growth rate (0.2 day−1) was lower than those reported in Malaysian strains and other strains from different geographical areas. The optimum range of salinity for the growth of this species agreed with field observations of the locality of origin. No significant change in toxin profiles was observed at different salinities. The cellular toxin quota, Qt, was not affected by the salinity-dependent growth rate. The toxin GTX4-12ol is presumed to be a transformation product of GTX4 from specific cellular reductase enzymes. Further investigation at the molecular level of toxin biosynthesis and subcellular enzyme activities is needed to provide insight in the production of this unique toxin analogue. Springer Netherlands 2011 Article NonPeerReviewed text en http://ir.unimas.my/id/eprint/3336/1/Effect%20of%20salinity.pdf Po, Teen Lim and Chui, P.L and Sato, S. and Chu, V.T and Kobiyama, A. and Ogata, T. (2011) Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam. Journal of Applied Phycology, 23. pp. 857-864. ISSN 1573-5176 https://link.springer.com/article/10.1007/s10811-010-9593-8 DOI:10.1007/s10811-010-9593-8 |
| spellingShingle | G Geography (General) GE Environmental Sciences Q Science (General) Po, Teen Lim Chui, P.L Sato, S. Chu, V.T Kobiyama, A. Ogata, T. Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam |
| title | Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam |
| title_full | Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam |
| title_fullStr | Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam |
| title_full_unstemmed | Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam |
| title_short | Effect of salinity on growth and toxin production of Alexandrium minutum isolated from a shrimp culture pond in northern Vietnam |
| title_sort | effect of salinity on growth and toxin production of alexandrium minutum isolated from a shrimp culture pond in northern vietnam |
| topic | G Geography (General) GE Environmental Sciences Q Science (General) |
| url | http://ir.unimas.my/id/eprint/3336/ http://ir.unimas.my/id/eprint/3336/ http://ir.unimas.my/id/eprint/3336/ http://ir.unimas.my/id/eprint/3336/1/Effect%20of%20salinity.pdf |