Pathway of initial prometryn degradation by a soil bacteria

Giardina, M. C.; Buffone, R.

doi:10.1016/0045-6535(77)90114-x

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Microbial metabolism is one of the major degradation processes of many PPPs (Ellis and Wackett ) including prometryn (Giardina and Buffone ). It is scientifically well established that plants can positively select for bacterial (Kowalchuk et al ; Neal et al ) and fungal (Broeckling et al ; Hannula et al ) groups in the soil, resulting in a so‐called rhizosphere, which can be specific to plant type, cultivar, genotype (İnceoğlu et al ; Hardoim et al ), and even growth stage (Mougel et al ; Green et al ; Houlden et al ).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Rhizosphere Contribution to the Environmental Fate of the Herbicide Prometryn

Hand

Gougoulias

Bramke

et al. 2020

Enviro Toxic and Chemistry

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Plant protection products (PPPs) undergo rigorous regulatory assessment to ensure that they do not pose unacceptable risks to the environment. Elucidation of their fate and behavior in soil is an integral part of this environmental risk assessment. The active substance degradation in soil of PPPs is first assessed in laboratory studies (typically following Organisation for Economic Co-operation and Development [OECD] test guideline 307). Conditions in guideline laboratory studies are far removed from those occurring under agricultural use, and the contribution of crop roots has currently not been assessed. We integrated viable plant root systems, representative of 3 different crop types, into the OECD test guideline 307 design to assess their impact on the dissipation of the herbicide prometryn. Significantly faster decline of parent residue and higher formation of nonextractable residues were observed in all 3 planted systems. This led to a reduction in the time required for 50% of the compound to dissipate (DT50) of approximately one-half in the presence of rye grass and hot pepper and of approximately one-third in the presence of red clover. These findings imply that plants and their associated root networks can have a significant influence on PPP dissipation. Based on these data, greater environmental realism could be added to the standardized laboratory study design by the inclusion of plant root systems into higher tier studies, which, in turn, could serve to improve the environmental risk assessment process. Environ Toxicol Chem 2020;39:450-457.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Rhizosphere Contribution to the Environmental Fate of the Herbicide Prometryn

Hand

Gougoulias

Bramke

et al. 2020

Enviro Toxic and Chemistry

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Microbial Degradation of Pesticides

Wallnöfer¹,

Engelhardt²

1989

Chemistry of Plant Protection

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Biodegration of s-triazine xenobiotics

Cook

1987

FEMS Microbiology Letters

206

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SUMMARYBiodegradation of xenobiotic compounds is examined with s-triazines as an example and with biological treatment of wastewater containing striazines as an aim. s-Triazines have been termed recalcitrant, but examination of the literature indicates that a potential for biodegradation exists. Nitrogen-limited enrichment cultures yield organisms able to degrade by-products of the industrial synthesis of s-triazine herbicides as sources of nitrogen. The choice of inoculum for these enrichments is important and often allows for successful enrichment after simple batch culture, but organisms containing several degradative reactions could be obtained only after selection in extended culture. Routine, specific determinations of all s-triazines (by HPLC) were essential throughout the work. Molar growth yields show complete mass balances for the utilization of s-triazines. Kinetic experiments indicate that specific degradation rates of s-triazines in growing cells are about 0.4 mkat/kg of protein. Characterised biochemical pathways consist of a series of hydrolytic cleavages of chloro-, amino-and alkylaminogroups from the s-triazine ring. Pathways con-

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Pathway of initial prometryn degradation by a soil bacteria

Cited by 3 publications

References 13 publications

Evaluation of the Rhizosphere Contribution to the Environmental Fate of the Herbicide Prometryn

Evaluation of the Rhizosphere Contribution to the Environmental Fate of the Herbicide Prometryn

Microbial Degradation of Pesticides

Biodegration of s-triazine xenobiotics

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