Removal and Ecotoxicity of 2,4-D and MCPA in Microbial Cultures Enriched with Structurally-Similar Plant Secondary Metabolites
Elżbieta Mierzejewska , Agnieszka Baran , Maciej Tankiewicz , Magdalena Urbaniak
AbstractThe removal of contaminants from the environment can be enhanced by interactions between structurally-related plant secondary metabolites (PSMs), selected xenobiotics and microorganisms. The aim of this study was to investigate the effect of selected PSMs (ferulic acid—FA; syringic acid—SA) on the removal of structurally-similar phenoxy herbicides (PHs): 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxyacetic acid (MCPA). The study also examines the biodegradation potential of soil bacteria, based on the occurrence of functional tdfA-like genes, and the ecotoxicity of the samples against two test species: Sinapis alba L. and Lepidium sativum L. The microbial cultures spiked with the PSMs demonstrated higher phenoxy acid removal: 97–100% in the case of 2,4-D and 99%–100% for MCPA. These values ranged from 5% to 100% for control samples not amended with FA or SA. The higher herbicide removal associated with PSM spiking can be attributed to acceleration of the microbial degradation processes. Our findings showed that the addition of SA particularly stimulated the occurrence of the total number of tfdA genes, with this presence being higher than that observed in the unamended samples. PSM spiking was also found to have a beneficial effect on ecotoxicity mitigation, reflected in high (102%) stimulation of root growth by the test species.
|Journal series||Water, [Water (Switzerland)], ISSN 2073-4441, (N/A 70 pkt)|
|Publication size in sheets||0.75|
|Keywords in English||2,4-D; MCPA; plant secondary metabolites; ferulic acid; syringic acid; biodegradation; ecotoxicity|
|ASJC Classification||; ; ;|
|License||Journal (articles only); author's original; ; after publication|
|Publication indicators||= 1; : 2017 = 1.007; : 2018 = 2.524 (2) - 2018=2.721 (5)|
|Finansowanie||This work was supported by the University of Lodz Student Research Grant "Plant Secondary Metabolites as stimulators of bacterial degradation of 2,4-D and MCPA" and the European Structural and Investment Funds, OP RDE-funded project ‘CHEMFELLS4UCTP’ (No. CZ.02.2.69/0.0/0.0/17_050/0008485).|
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