Variation of microcystin content of Microcystis aeruginosa relative to medium N:P ratio and growth stage

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Title
Variation of microcystin content of Microcystis aeruginosa relative to medium N:P ratio and growth stage
Author(s)
S J Lee; M H Jang; Hee Sik Kim; Byung Dae Yoon; Hee Mock Oh
Bibliographic Citation
Journal of Applied Microbiology, vol. 89, no. 2, pp. 323-329
Publication Year
2000
Abstract
Changes in the microcystin content of Microcystis aeruginosa UTEX 2388 were investigated at several N:P ratios of the medium and various growth stages. Under the P-fixed condition, the microcystin content of the cells changed with different medium N:P ratios, with the highest at 2748 μg g-1 at a N:P ratio of 16 after incubation for 7 d. The microcystin content of M. aeruginosa exhibited a high correlation with the total N content regardless of an N-fixed or P-fixed culture. When the N:P ratio of the medium was fixed to 16:1, the microcystin content of M. aeruginosa at various growth stages was highest at 2191 μg g-1 after an incubation of 4 d and the chlorophyll-a content showed a similar tendency. There was a highly significant relationship between the microcystin content of M. aeruginosa and the chlorophyll-a concentration in the culture during the incubation. Accordingly, the microcystin content of M. aeruginosa during incubation can be easily estimated and monitored by measuring the in vivo fluorescence changes in the culture.
ISSN
1364-5072
Publisher
Wiley
DOI
http://dx.doi.org/10.1046/j.1365-2672.2000.01112.x
Type
Article
Appears in Collections:
Synthetic Biology and Bioengineering Research Institute > Cell Factory Research Center > 1. Journal Articles
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