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

TY - JOUR

T1 - Effect of Selected Plant Extracts and D- and L-Lysine on the Cyanobacterium Microcystis aeruginosa

AU - Lurling, M.

AU - Van Oosterhout, F.

N1 - Reporting year: 2014 Metis note: 5650, AqE Data archiving: no data; property of WUR

PY - 2014

Y1 - 2014

N2 - 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 MORINGA-OLEIFERA SEEDS CONTROLLING EUTROPHICATION FRESH-WATER AMINO-ACID BLOOMS COAGULATION INHIBITION MECHANISM SUBSTANCES PHOSPHORUS Water Resources]

AB - 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 MORINGA-OLEIFERA SEEDS CONTROLLING EUTROPHICATION FRESH-WATER AMINO-ACID BLOOMS COAGULATION INHIBITION MECHANISM SUBSTANCES PHOSPHORUS Water Resources]

KW - national

U2 - 10.3390/w6061807

DO - 10.3390/w6061807

M3 - Article

SN - 2073-4441

VL - 6

SP - 1807

EP - 1825

JO - Water

JF - Water

IS - 6

ER -