Removal of microcystin-LR by strains of metabolically active probiotic bacteria.
The ability of specific strains of probiotic bacteria to remove the cyanobacterial peptide toxin microcystin-LR from aqueous solutions was assessed. Lactobacillus rhamnosus strains GG and LC-705, Bifidobacterium longum 46, Bifidobacterium lactis 420 and Bifidobacterium lactis Bb12 were shown to be the most effective in toxin removal among 11 tested strains. The highest removal percentage of microcystin-LR was 58.1%, observed with B. lactis Bb12 (toxin concentration 100 microg L(-1), 10(10) CFU mL(-1), 37 degrees C, 24 h). Freshly cultured bacteria were shown to be more efficient in microcystin removal than lyophilized or nonviable bacteria. Removal of microcystin-LR was shown to be dependent on both temperature and bacterial concentration. It is concluded that some of the tested strains have good potential in removing microcystins from aqueous solutions.
Nybom
Sonja M K
SM
Department of Biochemistry and Pharmacy, Abo Akademi University, Turku, Finland. sonja.nybom@abo.fi
Salminen
Seppo J
SJ
Meriluoto
Jussi A O
JA
D001427:Bacterial Toxins / Q000378:metabolism*; D001644:Bifidobacterium / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D000087522:Cyanobacteria Toxins; D052201:Lacticaseibacillus rhamnosus / Q000378:metabolism*; D008387:Marine Toxins / Q000378:metabolism*; D052998:Microcystins / Q000378:metabolism*; D019936:Probiotics / Q000378:metabolism; D013997:Time Factors
D001427:Bacterial Toxins; D000087522:Cyanobacteria Toxins; D008387:Marine Toxins; D052998:Microcystins; C078588:microcystin; C057862:cyanoginosin LR