Transposons inactive biosynthesis of the nonribosomal peptide microcystin in naturally occurring Planktothrix spp

Article Abstract:

A study was conducted on the analysis of 29 types of Planktothrix strains to find out if mutations of the mcy genes lead to the inability to synthesize microcystin (MC). It was observed that the different mutations resulting in inactivation of MC synthesis occurred frequently and made up a stable proportion of the mcy gene pool in Planktothrix populations for several years.

Microbiological synthesis, Polymerase chain reaction, Chemical properties, Cystine

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Molecular characterization of potential microcystin-producing cyanobacteria in Lake Ontario embayments and nearshore waters

Article Abstract:

A suite of PCR primers is used to examine the distribution and genotypic variation of potential microcystin (MC) producers along the southern and eastern shores of Lake Ontario in 2001 and 2003. It appears that the MC genotypes are widespread along the New York State shoreline of Lake Ontario and are carried through the lake through wind and surface water current patterns.

Biological diversity, Biodiversity, Surface water

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The microcystin composition of the cyanobacterium Plankothrix agardhii changes toward a more toxic variant with increasing light intensity

Article Abstract:

The effects of photon irradiance on the production of different microcystin variants by Plankothrix agardhii were investigated using light-limited turbidostats. However, of the two main microcystin variants detected in P. agardhii, the microcystin-DeRR content decreased twofold with increased photon irradiance, whereas the microcystin-DeLR content increased threefold

Genetic research

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