AI Article Synopsis
- Microcystins (MCs) are harmful cyclic peptides produced by cyanobacteria that can negatively impact both plants and animals, necessitating their analysis in various environments.
- A study was conducted on broccoli and mustard seedlings exposed to different concentrations of MCs, revealing that broccoli showed slight growth inhibition (<10%) while no significant changes were observed in mustard plants.
- Liquid chromatography-mass spectrometry confirmed the presence of the MC variant MC-LR, which was only detected in the roots of both plant species at low concentrations ranging from 0.9 to 2.6 ng/g of fresh weight.
Article 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 microgMCsL(-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 2.6ng (g fresh weight)(-1).
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| http://dx.doi.org/10.1016/j.toxicon.2006.12.008 | DOI Listing |
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