TY - JOUR
T1 - A nonlinear dynamic simulation model for xenobiotic transport and whole plant allocation following foliar application II. Model validation
AU - Satchivi, Norbert M.
AU - Stoller, Edward W.
AU - Wax, Loyd M.
AU - Briskin, Donald P.
N1 - Funding Information:
We thank Dr. Margaret Gawienowski for her helpful assistance in preparing the manuscript. We also thank the USDA-ARS (Specific Cooperative Agreement 58-3611-5-174) for providing partial funding for this project.
PY - 2000
Y1 - 2000
N2 - A validation study was performed for a nonlinear computer simulation model describing xenobiotic absorption, whole plant allocation, and metabolism. Validation involved comparisons of predicted xenobiotic behavior with actual data (from independent studies in the literature) for the herbicides bentazon, chlorimuronethyl, prosulfuron, rimsulfuron, thifensulfuron, clopyralid, picloram, fluroxypyr, imazaquin, imazethapyr, acifluorfen, 2,4-D, 2,4-DB, dicamba, haloxyfop-methyl, sethoxydim, and pyridate. Simulations were performed with parameters describing the plant, the herbicide physicochemical properties, and the environmental conditions used in the experimental studies. The conformity between simulated and actual absorption, whole plant distribution, and metabolism data were evaluated by the ratio of simulated values to actual values in 25 species treated with 18 herbicides from several chemical families such as benzothiadiazole, pyridinecarboxylic acid, imidazolinone, diphenyl ether, phenoxyalkanoic acid, benzoic acid, aryloxyphenoxypropionate, cyclohexanedione, and phenylpyridazine. In general, most predicted values for herbicide absorption, whole plant allocation, and metabolism were close to actual values for this group of herbicides. Comparisons between model prediction and actual herbicide absorption showed that in 79% of comparisons the ratios of predicted/observed were between 0.8 and 1.2. For whole plant allocation, 61% of the comparisons showed a ratio of 1 ± 0.3. These results demonstrate the utility of this new computer simulation model in predicting xenobiotic behavior in plants and the potential use of such models in rational design of herbicide molecules for optimal plant uptake and whole plant allocation. (C) 2000 Academic Press.
AB - A validation study was performed for a nonlinear computer simulation model describing xenobiotic absorption, whole plant allocation, and metabolism. Validation involved comparisons of predicted xenobiotic behavior with actual data (from independent studies in the literature) for the herbicides bentazon, chlorimuronethyl, prosulfuron, rimsulfuron, thifensulfuron, clopyralid, picloram, fluroxypyr, imazaquin, imazethapyr, acifluorfen, 2,4-D, 2,4-DB, dicamba, haloxyfop-methyl, sethoxydim, and pyridate. Simulations were performed with parameters describing the plant, the herbicide physicochemical properties, and the environmental conditions used in the experimental studies. The conformity between simulated and actual absorption, whole plant distribution, and metabolism data were evaluated by the ratio of simulated values to actual values in 25 species treated with 18 herbicides from several chemical families such as benzothiadiazole, pyridinecarboxylic acid, imidazolinone, diphenyl ether, phenoxyalkanoic acid, benzoic acid, aryloxyphenoxypropionate, cyclohexanedione, and phenylpyridazine. In general, most predicted values for herbicide absorption, whole plant allocation, and metabolism were close to actual values for this group of herbicides. Comparisons between model prediction and actual herbicide absorption showed that in 79% of comparisons the ratios of predicted/observed were between 0.8 and 1.2. For whole plant allocation, 61% of the comparisons showed a ratio of 1 ± 0.3. These results demonstrate the utility of this new computer simulation model in predicting xenobiotic behavior in plants and the potential use of such models in rational design of herbicide molecules for optimal plant uptake and whole plant allocation. (C) 2000 Academic Press.
KW - Computer simulation model
KW - Foliar-applied xenobiotics
KW - Herbicide
KW - Whole plant allocation
KW - Xenobiotic metabolism
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U2 - 10.1006/pest.2000.2494
DO - 10.1006/pest.2000.2494
M3 - Article
AN - SCOPUS:0033785393
SN - 0048-3575
VL - 68
SP - 85
EP - 95
JO - Pesticide Biochemistry and Physiology
JF - Pesticide Biochemistry and Physiology
IS - 2
ER -