Biodegradation of the herbicide mecoprop-p with soil depth and its relationship with class III tfdA genes
- Rodríguez Cruz, M. Sonia
- Baelum, Jacob
- Shaw, Liz J.
- Sørensen, Sebastian R.
- Shi, Shengjing
- Aspray, Thomas J.
- Jacobsen, Carsten S.
- Bending, G. D.
DOIAbstract
Mecoprop-p [(R)-2-(4-chloro-2-methylphenoxy) propanoic acid) is widely used 37 in agriculture and poses an environmental concern because of its susceptibility to leach 38 from soil to water. We investigated the effect of soil depth on mecoprop-p 39 biodegradation and its relationship with the number and diversity of tfdA related genes, 40 which are the most widely known genes involved in degradation of the 41 phenoxyalkanoic acid group of herbicides by bacteria. Mecoprop-p half-life (DT50) was 42 approximately 12 days in soil sampled from <30 cm depth, and increased progressively 43 with soil depth, reaching over 84 days at 70-80 cm. In sub-soil there was a lag period of 44 between 23 and 34 days prior to a phase of rapid degradation. No la...
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