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Title: Effects of Different Nitrogen Sources on the Growth and Toxin Production of Toxic Dinoflagellate Alexandrium minutum
Authors: Ya-Hui Lu
Tamao Noguchi
Osamu Arakawa
Deng-Fwu Hwang
Contributors: 國立臺灣海洋大學:食品科學系
Keywords: Alexandrium minutum
Paralytic shellfish poison
Nitrogen sources
Date: 2010-12
Issue Date: 2016-11-10T07:44:26Z
Publisher: 臺灣水產學會刊
Abstract: ABSTRACT: 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.
Relation: 38(1)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38823
Appears in Collections:[食品科學系] 期刊論文

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