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題名 | Effects of Different Nitrogen Sources on the Growth and Toxin Production of Toxic Dinoflagellate Alexandrium minutum=不同氮源對毒藻亞歷山大微藻Alexandrium minutum之生長及產毒性影響 |
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作 者 | 呂雅惠; 野口玉雄; 荒川修; 黃登福; | 書刊名 | 臺灣水產學會刊 |
卷期 | 38:1 2011.03[民100.03] |
頁次 | 頁67-79 |
分類號 | 379.21 |
關鍵詞 | 麻痺性貝毒; 渦鞭毛藻; 氮源; 亞歷山大微藻; Paralytic shellfish poison; Dinoflagellate; Nitrogen sources; Alexandrium minutum; |
語文 | 英文(English) |
中文摘要 | 本研究利用不同氮源調配培養液,探討對亞歷山大微藻成長和產毒之影響,得知亞歷山大微藻可以利用無機氮源硝酸鹽和氨,及有機態氮源尿素。但亞歷山大微藻並不能利用亞硝酸鹽。硝酸鹽、氨和尿素對亞歷山大微藻之最大比生長為0.24 day^(-1)、0.22 day^(-1)和0.16 day^(-1)。胺類和尿類之使用效率較亞硝酸鹽為佳。亞歷山大微藻在繁殖期之毒素產生速率,使用硝酸鹽培養基者較使用氨、尿素和亞硝酸鹽者為佳。藻毒之組成主要為GTX1,2,3,4,其中GTX1,4為顯著毒成分。 |
英文摘要 | Alexandrium minutum T1 was cultured in four nitrogen sources of nitrate, nitrite, ammonium and urea to study its growth kinetics and toxin production. It is found that A. minutum failed to thrive while using nitrite as sole nitrogen source. In contrast, the maximum specific growth rates of the microalga cultured using nitrate, ammonium and urea as nitrogen sources were 0.24 day^(-1), 0.22 day^(-1) and 0.16 day^(-1), repectively. The utility efficacy of ammonium (Ks=0.028 mM) and urea (Ks=0.034 mM) is better than nitrate (Ks=0.05 mM). In comparison with nitrate, other nitrogen compounds depressed the cell toxicity. From net toxin production rates (Rtox), the toxin production of A. minutum in the exponential growth stage in nitrate medium was higher than that in ammonium, followed by urea and nitrite. The toxin profile was stable and contained GTX1,2,3,4 only in all culture media. Toxins GTX1 and GTX4 were the predominant compounds throughout the growth cycle. |
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