Biopurification Systems: Current Advances and Future Prospects of On-Farm Biodegradation of Pesticides

2021 ◽  
Author(s):  
Carlos E. Rodríguez-Rodríguez ◽  
Juan Carlos Cambronero-Heinrichs ◽  
Víctor Castro-Gutiérrez ◽  
Gonzalo R. Tortella

2016 ◽  
Vol 82 (9) ◽  
pp. 2843-2853 ◽  
Author(s):  
Benjamin Horemans ◽  
Karolien Bers ◽  
Erick Ruiz Romero ◽  
Eva Pose Juan ◽  
Vincent Dunon ◽  
...  

ABSTRACTThe abundance oflibA, encoding a hydrolase that initiates linuron degradation in the linuron-metabolizingVariovoraxsp. strain SRS16, was previously found to correlate well with linuron mineralization, but not in all tested environments. Recently, an alternative linuron hydrolase, HylA, was identified inVariovoraxsp. strain WDL1, a strain that initiates linuron degradation in a linuron-mineralizing commensal bacterial consortium. The discovery of alternative linuron hydrolases poses questions about the respective contribution and competitive character ofhylA- andlibA-carrying bacteria as well as the role of linuron-mineralizing consortia versus single strains in linuron-exposed settings. Therefore, dynamics ofhylAas well asdcaQas a marker for downstream catabolic functions involved in linuron mineralization, in response to linuron treatment in agricultural soil and on-farm biopurification systems (BPS), were compared with previously reportedlibAdynamics. The results suggest that (i) organisms containing eitherlibAorhylAcontribute simultaneously to linuron biodegradation in the same environment, albeit to various extents, (ii) environmental linuron mineralization depends on multispecies bacterial food webs, and (iii) initiation of linuron mineralization can be governed by currently unidentified enzymes.IMPORTANCEA limited set of different isofunctional catabolic gene functions is known for the bacterial degradation of the phenylurea herbicide linuron, but the role of this redundancy in linuron degradation in environmental settings is not known. In this study, the simultaneous involvement of bacteria carrying one of two isofunctional linuron hydrolysis genes in the degradation of linuron was shown in agricultural soil and on-farm biopurification systems, as was the involvement of other bacterial populations that mineralize the downstream metabolites of linuron hydrolysis. This study illustrates the importance of the synergistic metabolism of pesticides in environmental settings.



Chemosphere ◽  
2012 ◽  
Vol 88 (9) ◽  
pp. 1114-1118 ◽  
Author(s):  
Kristel Sniegowski ◽  
Karolien Bers ◽  
Jaak Ryckeboer ◽  
Peter Jaeken ◽  
Pieter Spanoghe ◽  
...  


2015 ◽  
Vol 52 (2) ◽  
pp. 243-250 ◽  
Author(s):  
Kattia Madrigal-Zúñiga ◽  
Karla Ruiz-Hidalgo ◽  
Juan Salvador Chin-Pampillo ◽  
Mario Masís-Mora ◽  
Víctor Castro-Gutiérrez ◽  
...  


2012 ◽  
Vol 78 (8) ◽  
pp. 2783-2789 ◽  
Author(s):  
Karolien Bers ◽  
Kristel Sniegowski ◽  
René De Mot ◽  
Dirk Springael

ABSTRACTlibA, a gene encoding a novel type of linuron hydrolase, was recently identified in the linuron-mineralizingVariovoraxsp. strain SRS16. In order to assess the contribution oflibAto linuron degradation in environmental settings,libAabundance was monitored in response to the application of linuron and to environmental perturbations in agricultural soil microcosms and microcosms simulating the matrix of on-farm biopurification systems.libAnumbers were measured by real-time PCR and linked to reported data ofVariovoraxcommunity composition and linuron mineralization capacity. In the soil microcosms and one biopurification system setup,libAnumbers responded to the application of linuron and environmental changes in congruency with the modulation of linuron mineralization capacity and the occurrence of a particularVariovoraxphylotype (phylotype A). However, in another biopurification system setup, no such correlations were found. Our data suggest that in the simulated environmental settings, the occurrence oflibAcan be linked to the linuron mineralization capacity and thatlibAis primarily hosted byVariovoraxphylotype A strains. However, the results also suggest that, apart fromlibA, other, as-yet-unknown isofunctional genes play an important role in linuron mineralization in the environment.





Chemosphere ◽  
2013 ◽  
Vol 93 (6) ◽  
pp. 1084-1093 ◽  
Author(s):  
G.R. Tortella ◽  
R.A. Mella-Herrera ◽  
D.Z. Sousa ◽  
O. Rubilar ◽  
G. Briceño ◽  
...  


2011 ◽  
Vol 76 (1) ◽  
pp. 64-73 ◽  
Author(s):  
Kristel Sniegowski ◽  
Karolien Bers ◽  
Kris Van Goetem ◽  
Jaak Ryckeboer ◽  
Peter Jaeken ◽  
...  


2011 ◽  
Vol 77 (18) ◽  
pp. 6614-6621 ◽  
Author(s):  
Kristel Sniegowski ◽  
Karolien Bers ◽  
Jaak Ryckeboer ◽  
Peter Jaeken ◽  
Pieter Spanoghe ◽  
...  

ABSTRACTOn-farm biopurification systems (BPS) treat pesticide-contaminated wastewater of farms through biodegradation. Adding pesticide-primed soil has been shown to be beneficial for the establishment of pesticide-degrading populations in BPS. However, no data exist on the response of pesticide-degrading microbiota, either endogenous or introduced with pesticide-primed soil, when BPS are exposed to expected less favorable environmental conditions like cold periods, drought periods, and periods without a pesticide supply. Therefore, the response of microbiota mineralizing the herbicide linuron in BPS microcosm setups inoculated either with a linuron-primed soil or a nonprimed soil to a sequence of such less favorable conditions was examined. A period without linuron supply or a drought period reduced the size of the linuron-mineralizing community in both setups. The most severe effect was recorded for the setup containing nonprimed soil, in which stopping the linuron supply decreased the linuron degradation capacity to nondetectable levels. In both systems, linuron mineralization rapidly reestablished after conventional operation conditions were restored. A cold period and feeding with a pesticide mixture did not affect linuron mineralization. The changes in the linuron-mineralizing capacity in microcosms containing primed soil were associated with the dynamics of a particularVariovoraxphylotype that previously had been associated with linuron mineralization. This study suggests that the pesticide-mineralizing community in BPS is robust in stress situations imposed by changes in environmental conditions expected to occur on farms. Moreover, it suggests that, in cases where effects do occur, recovery is rapid after restoring conventional operation conditions.



2015 ◽  
Vol 18 (3) ◽  
pp. 64-73 ◽  
Author(s):  
Tim Chamen

Abstract Controlled traffic farming is a machinery management system that confines all field vehicles to the least possible area of permanent traffic lanes. It has developed in response to research evidence of widespread soil damage from compaction due to field traffic. The history of research on soil compaction is explored and found to be a relatively new phenomenon. Controlled traffic farming as a topic for research did not appear until the 1980s although its principles and benefits were well established before then. Research expanded over the next decades but changed subtly to more reviews on the topic as well as emphasis on environmental deliverables and some economics studies. Few if any researchers attempted to develop on-farm systems using existing machinery until the mid 1990s when a small and dedicated team in Australia encouraged farmers to experiment. This quickly led to rapid expansion across the continent to its present day c. 13% of the cropped area. Despite changes to extension services in northern Europe at around the turn of the century and a move to subsidiarity, this did not alter the model of controlled traffic adoption. This followed a similar pattern to that in Australia involving individuals rather than organizations.



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