The Microbial Degradation of 2,4-Dichlorophenoxyacetic Acid in Soil

Sandmann, E.R.I.C.; Loos, Michael; Dyk, L. P. van

doi:10.1007/978-1-4612-3770-9_1

Cited by 38 publications

(16 citation statements)

References 130 publications

(254 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results on the disappearance kinetics of 2,4-D in SS and nSS confirm the data that microbial degradation is the main mechanism of 2,4-D dissipation in soil [28,48,49]. The chemical data showed that in non-inoculated sterile soil (SS) a significant amount of 2,4-D (70% of the initial dose) still persisted after 36 days (Figure 3).…”

Section: Degradation Of 24-d and 24-dcp In Mineral Salt Mediumsupporting

confidence: 87%

Biodegradation kinetics of 2,4-D by bacterial strains isolated from soil

2011

View full text Add to dashboard Cite

The aim of the study was to characterize the 2,4-dichlorophenoxyacetic acid (2,4-D) degradative potential of three bacterial strains identified by MIDI-FAME profiling as Burkholderia cepacia (DS-1), Pseudomonas sp. (DS-2) and Sphingomonas paucimobilis (DS-3) isolated from soil with herbicide treatment history. All strains were capable of using herbicide as the only source of carbon and energy when grown in mineral salt medium (MSM) containing 2,4-D (50 mg/l). Over a 10 day incubation period, 69%, 73% and 54% of the initial dose of 2,4-D were degraded by strains DS-1, DS-2 and DS-3, respectively. Analysis of 2,4-dichlorophenol (2,4-DCP) concentration, the main metabolite of 2,4-D degradation, revealed that strains DS-1 and DS-2 may also have the potential to metabolize this compound. The percentage of 2,4-DCP removal was 67% and 77% in relation to maximum values of 9.5 and 9.2 mg/l determined after 4 and 2 days for MSM+DS-1 and MSM+DS-2, respectively. The degradation kinetics of 2,4-D (50 mg/kg) in sterile soil (SS) showed different potential of tested strains to degrade 2,4-D. The times within which the initial 2,4-D concentration was reduced by 50% (DT50) were 6.3, 5.0 and 9.4 days for SS+DS-1, SS+DS-2 and SS+DS-3, respectively.

show abstract

Section: Degradation Of 24-d and 24-dcp In Mineral Salt Mediumsupporting

confidence: 87%

Biodegradation kinetics of 2,4-D by bacterial strains isolated from soil

2011

View full text Add to dashboard Cite

show abstract

“…However, as stated previously, the data shown in the tables represent only one‐third and one‐fourth, respectively, of all the data taken in each of the 2 study years. The need for and importance of adequate soil moisture to effect microbial degradation of 2,4‐D is well documented [3‐5, 12, 13]. In these studies soil moisture content appeared to be the most important soil parameter influencing the rate of 2,4‐D dissipation.…”

Section: Resultsmentioning

confidence: 99%

“…Moisture content is an important factor influencing the rate of degradation of 2,4‐D in soil [3, 4]. The trials reported here were conducted in various soil types; therefore, the moisture content of each trial required standardization in order to allow meaningful comparisons between and among the various trials.…”

Section: Methodsmentioning

confidence: 99%

2,4‐D dissipation in field soils after applications of 2,4‐D dimethylamine salt and 2,4‐D 2‐ethylhexyl ester

Wilson¹,

Geronimo²,

Armbruster

1997

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Abstract-2,4-Dichlorophenoxyacetic acid (2,4-D) was first registered in 1947 as an agricultural herbicide, and it is still the most widely used herbicide worldwide. End-use products, however, are generally formulated as inorganic or amine salts, or as esters. Because of the various forms available, there was concern that by testing only one form, the environmental profile generated might be insufficient to represent all forms. Therefore, as part of the 2,4-D reregistration process in the U.S., 30 soil dissipation studies were conducted with 2,4-D dimethylamine salt and 2,4-D 2-ethylhexyl ester over a 2-year period. Trials were located in seven states and included four cropping practices and bare soil. The results, averaged over all conditions, showed equivalent rates of 2,4-D dissipation in soil when applied as either the amine salt or ester forms. These results also confirm data from earlier field studies in Canada and Washington state showing equivalent 2,4-D dissipation in soil from applications of isooctyl ester, dimethylamine salt, and mixed amine salt forms. The data from the current and former studies show that ester and amine forms have little effect on the rate of dissipation of 2,4-D per se because they are converted rapidly to the same anionic form.

show abstract

“…Mots c16s: D6gradation, bact6rie, r6sidus, sol, 2,4-D It has been known for over 4O yr that2,4-D (2,4-dichloro-phenoxyacetic acid) is degraded in the soil by microbiological mechanisms (Audus 1964;Loos 1975;Sandmann et al 1988;Smith 1989). Several Arthrobacter, Flqvobqcterium, and P s eudomonas spp.…”

mentioning

confidence: 99%