Effects of microcystins on broccoli and mustard, and analysis of accumulated toxin by liquid chromatography-mass spectrometry

Suvi Järvenpää, Catharina Lundberg-Niinistö, Lisa Spoof, Olli Sjövall, Esa Tyystjärvi, Jussi Meriluoto*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

71 Citations (Scopus)

Abstract

Microcystins (MCs) are cyclic heptapeptides and protein phosphatase inhibitors produced by many species of cyanobacteria. MCs have been shown to cause adverse effects on animals as well as plants and therefore methods are needed for analysing MCs in different matrices. We assessed the effects of MC exposure on broccoli (Brassica oleracea var. italica) and mustard (Sinapis alba) by watering the seedlings with water containing 0, 1 or 10 μg MCs L-1 (concentrations typically found in natural waters). Morphological characteristics, chlorophyll concentrations and chlorophyll fluorescence were investigated, but the only distinct difference compared to control plants was a slight (<10%) growth inhibition seen in broccoli. Afterwards the MC concentration of selected plant samples was quantitated using liquid chromatography-mass spectrometry. Among the four MC variants present in the exposure mixture, only MC-LR was clearly detectable, and the toxin was found only in the roots of broccoli and mustard. The detected MC-LR concentrations ranged from 0.9 to 2.6 ng (g fresh weight)-1.

Original languageEnglish
Pages (from-to)865-874
Number of pages10
JournalToxicon
Volume49
Issue number6
DOIs
Publication statusPublished - May 2007
MoE publication typeA1 Journal article-refereed

Keywords

  • Accumulation
  • Cyanobacteria
  • Microcystin
  • Plants
  • Toxin

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