Competitive sorption-desorption behavior of triazine herbicides with plant cuticular fractions

Michal Shechter; Baoshan Xing; Frank Dieter Kopinke; Benny Chefetz

doi:10.1021/jf0614488

Competitive sorption-desorption behavior of triazine herbicides with plant cuticular fractions

Michal Shechter, Baoshan Xing, Frank Dieter Kopinke, Benny Chefetz^*

^*Corresponding author for this work

Department of Soil and Water Sciences

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

Sorption interactions of plant cuticular matter with organic compounds are not yet fully understood. The objective of this study was to examine the competitive sorption-desorption interactions of the triazine herbicides (atrazine and ametryn) with cuticular fractions isolated from tomato fruits and leaves of Agave americana. The ¹³C NMR data suggest a rubber-like nature for the cutin. This biopolymer exhibited reversible and noncompetitive sorption. Enhanced desorption of atrazine was recorded in the bi-solute system with bulk and dewaxed A. americana cuticles. ¹³C NMR analyses of these samples suggested that the sorbed competitor ametryn facilitated a physical phase transition of rigid paraffinic sorption domain to mobile and flexible domain during sorption process. We suggest that the different sorption-desorption behavior obtained for the two cuticles is related to the higher content of waxes (14% vs 2.6%) and lower content of cutin (46% vs 75%) in the A. americana versus tomato fruit cuticle.

Original language	English
Pages (from-to)	7761-7768
Number of pages	8
Journal	Journal of Agricultural and Food Chemistry
Volume	54
Issue number	20
DOIs	https://doi.org/10.1021/jf0614488
State	Published - 4 Oct 2006

Keywords

Atrazine
Cutan
Cutin
Desorption
Glass transition temperature
NMR
Paraffinic carbon
Plant cuticle
Sorption

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10.1021/jf0614488

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title = "Competitive sorption-desorption behavior of triazine herbicides with plant cuticular fractions",

abstract = "Sorption interactions of plant cuticular matter with organic compounds are not yet fully understood. The objective of this study was to examine the competitive sorption-desorption interactions of the triazine herbicides (atrazine and ametryn) with cuticular fractions isolated from tomato fruits and leaves of Agave americana. The 13C NMR data suggest a rubber-like nature for the cutin. This biopolymer exhibited reversible and noncompetitive sorption. Enhanced desorption of atrazine was recorded in the bi-solute system with bulk and dewaxed A. americana cuticles. 13C NMR analyses of these samples suggested that the sorbed competitor ametryn facilitated a physical phase transition of rigid paraffinic sorption domain to mobile and flexible domain during sorption process. We suggest that the different sorption-desorption behavior obtained for the two cuticles is related to the higher content of waxes (14% vs 2.6%) and lower content of cutin (46% vs 75%) in the A. americana versus tomato fruit cuticle.",

keywords = "Atrazine, Cutan, Cutin, Desorption, Glass transition temperature, NMR, Paraffinic carbon, Plant cuticle, Sorption",

author = "Michal Shechter and Baoshan Xing and Kopinke, {Frank Dieter} and Benny Chefetz",

year = "2006",

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AU - Chefetz, Benny

PY - 2006/10/4

Y1 - 2006/10/4

N2 - Sorption interactions of plant cuticular matter with organic compounds are not yet fully understood. The objective of this study was to examine the competitive sorption-desorption interactions of the triazine herbicides (atrazine and ametryn) with cuticular fractions isolated from tomato fruits and leaves of Agave americana. The 13C NMR data suggest a rubber-like nature for the cutin. This biopolymer exhibited reversible and noncompetitive sorption. Enhanced desorption of atrazine was recorded in the bi-solute system with bulk and dewaxed A. americana cuticles. 13C NMR analyses of these samples suggested that the sorbed competitor ametryn facilitated a physical phase transition of rigid paraffinic sorption domain to mobile and flexible domain during sorption process. We suggest that the different sorption-desorption behavior obtained for the two cuticles is related to the higher content of waxes (14% vs 2.6%) and lower content of cutin (46% vs 75%) in the A. americana versus tomato fruit cuticle.

AB - Sorption interactions of plant cuticular matter with organic compounds are not yet fully understood. The objective of this study was to examine the competitive sorption-desorption interactions of the triazine herbicides (atrazine and ametryn) with cuticular fractions isolated from tomato fruits and leaves of Agave americana. The 13C NMR data suggest a rubber-like nature for the cutin. This biopolymer exhibited reversible and noncompetitive sorption. Enhanced desorption of atrazine was recorded in the bi-solute system with bulk and dewaxed A. americana cuticles. 13C NMR analyses of these samples suggested that the sorbed competitor ametryn facilitated a physical phase transition of rigid paraffinic sorption domain to mobile and flexible domain during sorption process. We suggest that the different sorption-desorption behavior obtained for the two cuticles is related to the higher content of waxes (14% vs 2.6%) and lower content of cutin (46% vs 75%) in the A. americana versus tomato fruit cuticle.

KW - Atrazine

KW - Cutan

KW - Cutin

KW - Desorption

KW - Glass transition temperature

KW - NMR

KW - Paraffinic carbon

KW - Plant cuticle

KW - Sorption

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Competitive sorption-desorption behavior of triazine herbicides with plant cuticular fractions

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Keywords

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