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Title: Uptake, translocation, and metabolism of ( sup 14 C)thuringiensin (. beta. -exotoxin) in corn

Abstract

The absorption, translocation, and metabolism of ({sup 14}C)thuringiensin ({beta}-exotoxin), an insecticide, derived from Bacillus thuringiensis was investigated in corn. Corn was harvested 3 and 7 days after its roots or leaves were exposed to thuringiensin. Corn absorbed more thuringiensin at 7 than 3 days of root exposure. Less than 10% of the applied thuringiensin was absorbed after 7 days of exposure. Only 12% of the foliar-applied thuringiensin was detected in the whole plant, and amounts absorbed at 3 and 7 days were similar. About 80% of the applied radioactivity was found in the leaf wash at both times of harvest, and only 20% of the absorbed was translocated out of the treated leaf. More than 95% of the absorbed radioactivity remained in the root. Time did not affect the distribution pattern of root- or foliar-applied thuringiensin in different parts of corn. In this study, thuringiensin was not readily absorbed by root or leaves of corn and had limited mobility in the plant. The insecticide was also not metabolized by corn shoot after 3 and 7 days of exposures. The implications of these results are discussed.

Authors:
;  [1]
  1. (Univ. of Florida, Lake Alfred (USA))
OSTI Identifier:
7190356
Resource Type:
Journal Article
Journal Name:
Journal of Agricultural and Food Chemistry; (USA)
Additional Journal Information:
Journal Volume: 37:2; Journal ID: ISSN 0021-8561
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; CARBON 14 COMPOUNDS; TISSUE DISTRIBUTION; INSECTICIDES; METABOLISM; ABSORPTION; LEAVES; MAIZE; ROOTS; TRACER TECHNIQUES; TRANSLOCATION; UPTAKE; CEREALS; DISTRIBUTION; GRASS; ISOTOPE APPLICATIONS; LABELLED COMPOUNDS; LILIOPSIDA; MAGNOLIOPHYTA; PESTICIDES; PLANTS; 553003* - Agriculture & Food Technology- Pest & Disease Control- (1987-)

Citation Formats

Mersie, W., and Singh, M. Uptake, translocation, and metabolism of ( sup 14 C)thuringiensin (. beta. -exotoxin) in corn. United States: N. p., Web.
Mersie, W., & Singh, M. Uptake, translocation, and metabolism of ( sup 14 C)thuringiensin (. beta. -exotoxin) in corn. United States.
Mersie, W., and Singh, M. . "Uptake, translocation, and metabolism of ( sup 14 C)thuringiensin (. beta. -exotoxin) in corn". United States.
@article{osti_7190356,
title = {Uptake, translocation, and metabolism of ( sup 14 C)thuringiensin (. beta. -exotoxin) in corn},
author = {Mersie, W. and Singh, M.},
abstractNote = {The absorption, translocation, and metabolism of ({sup 14}C)thuringiensin ({beta}-exotoxin), an insecticide, derived from Bacillus thuringiensis was investigated in corn. Corn was harvested 3 and 7 days after its roots or leaves were exposed to thuringiensin. Corn absorbed more thuringiensin at 7 than 3 days of root exposure. Less than 10% of the applied thuringiensin was absorbed after 7 days of exposure. Only 12% of the foliar-applied thuringiensin was detected in the whole plant, and amounts absorbed at 3 and 7 days were similar. About 80% of the applied radioactivity was found in the leaf wash at both times of harvest, and only 20% of the absorbed was translocated out of the treated leaf. More than 95% of the absorbed radioactivity remained in the root. Time did not affect the distribution pattern of root- or foliar-applied thuringiensin in different parts of corn. In this study, thuringiensin was not readily absorbed by root or leaves of corn and had limited mobility in the plant. The insecticide was also not metabolized by corn shoot after 3 and 7 days of exposures. The implications of these results are discussed.},
doi = {},
journal = {Journal of Agricultural and Food Chemistry; (USA)},
issn = {0021-8561},
number = ,
volume = 37:2,
place = {United States},
year = {},
month = {}
}