Effect of Selected Plant Extracts and d- and l-Lysine on the Cyanobacterium Microcystis aeruginosa

Water

Miquel Lürling¹ 

[1] Aquatic Ecology and Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 47, Wageningen 6700 AA, The Netherlands; E-Mail:

关键词: eutrophication control;    mitigation;    natural algaecide;    nuisance cyanobacteria;   

DOI  :  10.3390/w6061807

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.