Relationship between plant uptake of pesticides and water-extractable residue in Japanese soils

Motoki, Yutaka; Iwafune, Takashi; Seike, Nobuyasu; Otani, Takashi; Akiyama, Yoshihiro

doi:10.1584/jpestics.d15-017

Cited by 24 publications

(22 citation statements)

References 19 publications

(21 reference statements)

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“…Motoki et al 9) investigated the relationship between the concentration of pesticides in Brassica rapa L. var. perviridis shoots and four typical Japanese soils.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have focused on relationships between plant concentrations and the behavior of organic chemicals in the soil. 9,10) Despite plant growth conditions being important in affecting plant physiological reactions, the influence of these on pesticide uptake has not been investigated. In this study, we measured the concentrations of pesticides in shoots and roots of B. rapa var.…”

Section: Introductionmentioning

confidence: 99%

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The influence of Brassica rapa var. perviridis growth conditions on the uptake and translocation of pesticides

et al. 2018

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We cultivated Brassica rapa var. perviridis in soil mixed with four pesticides (fenobucarb, procymidone, flutolanil, and tolclofosmethyl) at different temperatures, day lengths, and soil water contents. We compared plants' uptake and translocation abilities of the pesticides as affected by growth conditions. The root concentration factor (RCF) of pesticides tended to increase with rising temperature; however, but the influence of temperature on the transpiration stream concentration factor (TSCF) differed for each pesticide. The RCFs and TSCFs of pesticides were high for short days. The soil water content had little or no effect on the uptake and translocation of pesticides. These results showed that it is necessary to consider growth conditions, especially the temperature and day length in plant uptake models for these pesticides.

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“…Motoki et al 9) investigated the relationship between the concentration of pesticides in Brassica rapa L. var. perviridis shoots and four typical Japanese soils.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of Brassica rapa var. perviridis growth conditions on the uptake and translocation of pesticides

et al. 2018

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“…To prevent pesticide contamination of succeeding crops, understanding the dissipation behavior of phytoavailable pesticides in soil is crucial. Our previous research 3) showed that the uptake concentrations of leafy vegetables cultivated in pesticide-applied soils had a higher positive correlation with the concentrations of water-extractable than total-extractable pesticides (i.e., the concentrations of pesticides extracted sequentially from soils using water and acetone). This result suggests that the phytoavailability of the residual pesticides in soil can be assessed using wa-ter-extractable concentrations in soil.…”

Section: Introductionmentioning

confidence: 95%

Effects of temperature on the dissipation of total- and water-extractable pesticides in Japanese soils

Motoki¹,

Iwafune²,

Seike

et al. 2020

J. Pestic. Sci.

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We investigated the dissipation of 27 pesticides in five Japanese soils at three temperatures and the variability of activation energies (E a). The dissipation of total pesticides extracted sequentially using water and acetone was fitted to a single first-order (SFO) model. The E a values calculated from the dissipation rate constants of the SFO model showed a normal distribution with a median of 61.1 kJ mol −1. The dissipation of water-extractable pesticides (i.e., phytoavailable pesticides) was fitted to a double firstorder in parallel model with two dissipation rate constants: k 1 and k 2. The E a values calculated from k 1 and k 2 showed normal or lognormal distribution, and the medians of the normal distribution calculated from k 1 and k 2 were 62.8 and 45.2 kJ mol −1 , respectively. Furthermore, the method for estimating the biphasic dissipation of phytoavailable pesticides at different temperatures by using the median E a values of the laboratory experiment was demonstrated in a field experiment.

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“…Ibaraki et al indicated that a content of 0.025 mol/L of HCl-extractable cadmium from soil showed a significant correlation with the cadmium content of wheat grain 12) . Motoki et al 13) also tried to evaluate the pesticide availability of plants, and confirmed that concentrations of eight pesticides in Komatsuna (Brassica rapa var. perviridis) shoots showed higher positive correlations with waterextractable concentrations than with exhaustive soil concentrations obtained from shaking the extraction twice with acetone.…”

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confidence: 92%

Relationship between Heptachlor Epoxide Concentration in Pumpkin (Cucurbita maxima) and Soil Concentration Extracted with 50% (v/v) Methanol–Water Solution

Seike

Otani

2019

Kankyou Kagaku

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Summar y In order to establish a soil diagnosis to avoid the circulation of contaminated pumpkin, the availability of heptachlor exo-epoxide (HEPX) in soil for uptake by pumpkin was evaluated. Namely, the relationship between HEPX concentrations in soils extracted with 50% (v/v) methanol-water solution and HEPX concentrations in pumpkin was investigated. We first tested the early-growth shoots of pumpkin (Cucurbita maxima Dutch. cv. Ebisu) planted in HEPX-contaminated soil in an environmentally controlled chamber. Significant (P＜0.01) relationships were found in regression analysis, which indicated that 50% (v/v) methanol-water solution is suitable for evaluating HEPX availability in soil by early-growth shoots of pumpkin. Next, HEPX concentrations in soils collected from the plant bases and extracted with 50% (v/v) methanol-water solution, and in the fruits of three varieties of pumpkin (C. maxima Dutch. cv. Ebisu, C. maxima Dutch. cv. Ajihei, and C. maxima Dutch. cv. TC2A) planted in eight fields, showed significant (P＜0.01) relationships. However, the coefficients of determination (R 2) of the regression lines for pumpkin fruit were lower than those for the early-growth pumpkin shoots. This implied that the HEPX concentration in soil extracted with 50% (v/v) methanol-water solution, nodal positions of fruits, and dry matter production of fruits contribute to the HEPX concentration in pumpkin fruit. The result of multiple regression analysis using these factors showed that the adjusted R 2 values in all varieties increased compared to those determined by single regression analysis. However, from the viewpoint of soil diagnosis, it is better to estimate the HEPX concentration in pumpkin fruits not by using multiple factors, but by using the HEPX concentration in soil extracted with 50% (v/v) methanol-water solution only.

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Relationship between plant uptake of pesticides and water-extractable residue in Japanese soils

Cited by 24 publications

References 19 publications

The influence of <i>Brassica rapa</i> var. <i>perviridis</i> growth conditions on the uptake and translocation of pesticides

The influence of <i>Brassica rapa</i> var. <i>perviridis</i> growth conditions on the uptake and translocation of pesticides

Effects of temperature on the dissipation of total- and water-extractable pesticides in Japanese soils

Relationship between Heptachlor Epoxide Concentration in Pumpkin (<i>Cucurbita maxima</i>) and Soil Concentration Extracted with 50% (v/v) Methanol–Water Solution

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