Variations of Growth and Toxin Yield in Cylindrospermopsis raciborskii under Different Phosphorus Concentrations.

ABSTRACT: The bloom-forming cyanobacteria, Cylindrospermopsis raciborskii, is a producer of the cytotoxic cylindrospermopsin (CYN). In this study, the growth, toxin yield, and expression of CYN biosynthesis genes of C. raciborskii were examined under varying phosphorus (P) concentrations. The results show the cell number at 0.00 and 0.01 mg·L^-1 P was significantly lower than that at higher P concentrations (≥0.5 mg·L^-1). The chlorophyll a content, filament length, heterocyst, and akinete numbers at P ≤ 0.05 mg·L^-1 were also significantly reduced. The intracellular and extracellular CYN concentrations and the extracellular proportions increased during the culture period, and larger values were observed at higher P concentrations. Total CYN content

SUBMITTER: Yang Y 

PROVIDER: S-EPMC5307294 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature