Skip to Main content Skip to Navigation
Journal articles

Dose-dependent effects of the herbicide mesotrione on soil cyanobacterial communities.

Abstract : This study aimed to investigate the dose-response effects of an herbicide on soil photosynthetic microbial communities, particularly cyanobacteria, using a microcosm approach. Pure mesotrione (active ingredient), and Callisto (a commercial formulation of this triketone herbicide), were spread at different rates on soil microcosm surfaces. Soil Chlorophyll concentrations were quantified to assess the photosynthetic biomass, and the genetic structure and diversity of the cyanobacterial community were investigated by a group-specific polymerase chain reaction followed by denaturing gradient gel electrophoresis. Dose-dependent responses were evidenced for both functional and structural parameters. No effect was detected in soils treated with 1 × AR (1-fold recommended application rate) irrespective of the herbicide formulation. At 10 × AR (10-fold recommended application rate), only Callisto treatment induced significant decreases of photosynthetic biomass, whereas structural parameters were less affected. At the 100 × AR (100-fold recommended application rate), both pure mesotrione and Callisto had strong negative impacts on soil chlorophyll concentrations and cyanobacterial genetic structure and diversity. At both the 10 × AR and 100 × AR treatments, Callisto induced significant stronger effects than pure mesotrione. In addition, indicators of photosynthetic biomass, compared with structural parameters of cyanobacterial communities (within 14 days), responded (within 7 days) more quickly to herbicide stress. The results of this study underscore the relevance of soil photosynthetic microbial communities to develop indicators for herbicide risk assessment.
Document type :
Journal articles
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-00815290
Contributor : Clarisse Mallet <>
Submitted on : Thursday, April 18, 2013 - 2:41:11 PM
Last modification on : Tuesday, February 23, 2021 - 11:28:02 AM

Links full text

Identifiers

Collections

Citation

Olivier Crouzet, Jarosław Wiszniowski, Florence Donnadieu, Frédérique Bonnemoy, Jacques Bohatier, et al.. Dose-dependent effects of the herbicide mesotrione on soil cyanobacterial communities.. Archives of Environmental Contamination and Toxicology, Springer Verlag, 2013, 64 (1), pp.23-31. ⟨10.1007/s00244-012-9809-9⟩. ⟨hal-00815290⟩

Share

Metrics

Record views

253