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Microbial modulation in the biomass and toxin production of a red-tide causing alga
Zheng, TL; Su, JQ; Maskaoui, K; Yu, ZM; Hu, Z; Xu, JS; Hong, HS
2005
Source PublicationMARINE POLLUTION BULLETIN
ISSN0025-326X
Volume51Issue:8-12Pages:1018-1025
SubtypeArticle
AbstractThe effect of S-10, a strain of marine bacteria isolated from sediment in the Western Xiamen Sea, on the growth and paralytic shellfish poison (PSP) production in the alga Alexandrium tamarense (A. tamarense) was studied under controlled experimental conditions. The results of these experiments have shown that the growth of A. tamarense is obviously inhibited by S-10 at high concentrations, however no evident effect on its growth was observed at low concentrations. Its PSP production was also inhibited by S 10 at different concentrations, especially at low concentrations. The toxicity of this strain of A. tamarense is about (0.9512.14) x 10(-6) MU/cell, a peak toxicity value of 12.14 x 10(-6) MU/cell appeared on the 14th day, after which levels decreased gradually. The alga grew well in conditions of pH 6-8 and salinities of 20-34 parts per thousand. The toxicity of the alga varied markedly at different pH and salinity levels. Toxicity decreased as pH increased, while it increased with salinity and reached a peak value at a salinity of 30 parts per thousand, after which it declined gradually. S-10 at a concentration of 1.02 x 10(9) cells/ml inhibited growth and the PSP production of A. tamarense at different pH and salinity levels. S-10 had the strongest inhibitory function on the growth of A. tamarense under conditions of pH 7 and a salinity of 34 parts per thousand. The best inhibitory effect on PSP production by A. tamarense was at pH 7, this inhibitory effect on PSP production did not relate to salinity. Interactions between marine bacteria and A. tamarense were also investigated using the flow cytometer technique (FCM) as well as direct microscope counting. S-10 was identitied as being a member of the genus Bacillus, the difference in 16S rDNA between S-10 and Bacillus halmapalus was only 2%. The mechanism involved in the inhibition of growth and PSP production of A. tamarense by this strain of marine bacteria, and the prospect of using it and other marine bacteria in the biocontrol of red-tides was discussed. (c) 2005 Elsevier Ltd. All rights reserved.; The effect of S-10, a strain of marine bacteria isolated from sediment in the Western Xiamen Sea, on the growth and paralytic shellfish poison (PSP) production in the alga Alexandrium tamarense (A. tamarense) was studied under controlled experimental conditions. The results of these experiments have shown that the growth of A. tamarense is obviously inhibited by S-10 at high concentrations, however no evident effect on its growth was observed at low concentrations. Its PSP production was also inhibited by S 10 at different concentrations, especially at low concentrations. The toxicity of this strain of A. tamarense is about (0.9512.14) x 10(-6) MU/cell, a peak toxicity value of 12.14 x 10(-6) MU/cell appeared on the 14th day, after which levels decreased gradually. The alga grew well in conditions of pH 6-8 and salinities of 20-34 parts per thousand. The toxicity of the alga varied markedly at different pH and salinity levels. Toxicity decreased as pH increased, while it increased with salinity and reached a peak value at a salinity of 30 parts per thousand, after which it declined gradually. S-10 at a concentration of 1.02 x 10(9) cells/ml inhibited growth and the PSP production of A. tamarense at different pH and salinity levels. S-10 had the strongest inhibitory function on the growth of A. tamarense under conditions of pH 7 and a salinity of 34 parts per thousand. The best inhibitory effect on PSP production by A. tamarense was at pH 7, this inhibitory effect on PSP production did not relate to salinity. Interactions between marine bacteria and A. tamarense were also investigated using the flow cytometer technique (FCM) as well as direct microscope counting. S-10 was identitied as being a member of the genus Bacillus, the difference in 16S rDNA between S-10 and Bacillus halmapalus was only 2%. The mechanism involved in the inhibition of growth and PSP production of A. tamarense by this strain of marine bacteria, and the prospect of using it and other marine bacteria in the biocontrol of red-tides was discussed. (c) 2005 Elsevier Ltd. All rights reserved.
KeywordMicrobial Modulation Alexandrium Tamarense Paralytic Shellfish Poison (Psp)
Subject AreaEnvironmental Sciences ; Marine & Freshwater Biology
DOI10.1016/j.marpolbul.2005.02.039
URL查看原文
Indexed ByISTP ; SCI
Language英语
WOS IDWOS:000234079700046
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Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/2718
Collection海洋生态与环境科学重点实验室
Affiliation1.Xiamen Univ, Sch Life Sci, Xiamen 361005, Peoples R China
2.Xiamen Univ, Key Lab SED, Xiamen 361005, Peoples R China
3.Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Zheng, TL,Su, JQ,Maskaoui, K,et al. Microbial modulation in the biomass and toxin production of a red-tide causing alga[J]. MARINE POLLUTION BULLETIN,2005,51(8-12):1018-1025.
APA Zheng, TL.,Su, JQ.,Maskaoui, K.,Yu, ZM.,Hu, Z.,...&Hong, HS.(2005).Microbial modulation in the biomass and toxin production of a red-tide causing alga.MARINE POLLUTION BULLETIN,51(8-12),1018-1025.
MLA Zheng, TL,et al."Microbial modulation in the biomass and toxin production of a red-tide causing alga".MARINE POLLUTION BULLETIN 51.8-12(2005):1018-1025.
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