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Water 2014, 6(6), 1807-1825; doi:10.3390/w6061807
Article

Effect of Selected Plant Extracts and D- and L-Lysine on the Cyanobacterium Microcystis aeruginosa

1,2,*  and 1
Received: 26 April 2014; in revised form: 7 June 2014 / Accepted: 10 June 2014 / Published: 17 June 2014
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Abstract: We tested extracts from Fructus mume, Salvia miltiorrhiza and Moringa oleifera as well as L-lysine and D-Lysine as curative measures to rapidly suppress the cyanobacterium Microcystis aeruginosa NIVA-CYA 43. We tested these compounds under similar conditions to facilitate comparisons. We hypothesized that for each compound, relatively low concentrations—i.e., 5–50 mg L−1, would reduce M. aeruginosa biomass. At these low concentrations, only L-lysine caused a decline in M. aeruginosa biomass at ≥4.3 mg L−1. F. mume extract was effective to do so at high concentrations, i.e., at ≥240 mg L−1, but the others were virtually non-effective. Low pH caused by organic acids is a probable explanation for the effect of F. mume extract. No complete wipe-outs of the experimental population were achieved as Photosystem II efficiency showed a recovery after six days. L-lysine may be effective at low concentrations—meaning low material costs. However, the effect of L-lysine seems relatively short-lived. Overall, the results of our study did not support the use of the tested plant extracts and amino-acid as promising candidates for curative application in M. aeruginosa bloom control.
Keywords: eutrophication control; mitigation; natural algaecide; nuisance cyanobacteria eutrophication control; mitigation; natural algaecide; nuisance cyanobacteria
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lürling, M.; van Oosterhout, F. Effect of Selected Plant Extracts and D- and L-Lysine on the Cyanobacterium Microcystis aeruginosa. Water 2014, 6, 1807-1825.

AMA Style

Lürling M, van Oosterhout F. Effect of Selected Plant Extracts and D- and L-Lysine on the Cyanobacterium Microcystis aeruginosa. Water. 2014; 6(6):1807-1825.

Chicago/Turabian Style

Lürling, Miquel; van Oosterhout, Frank. 2014. "Effect of Selected Plant Extracts and D- and L-Lysine on the Cyanobacterium Microcystis aeruginosa." Water 6, no. 6: 1807-1825.


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