Metabolism and co- metabolism of chlomthoxynil in Egyptian soils
Abstract: Chlomethoxynil ( 2,4 – dichlorophenyl- 1-3- methoxy- 4- nitrophenyl ether ) is used as soil residual herbicide for the control of weeds in trans- planted rice.
The metabolism of chlomethoxynil and the co-metabolism in the
Presence of sodium acetate, sodium succinate, sodium glutamate and nutrient broth by soil leachate microorganisms were studied. It was shown that 54.4%, 85.84%, 84.00%, 93. 13% and 91. 10% of the initial dose of this herbicide (100 ppm ) was consumed after three weeks of incubation in the above cultures respectively. The whole cells grown previously on chlomethoxynil and nutrient broth were fully adapted towards chlomethoxynil when used as sole substrate in the whole cell buffer suspension. 2,4-Dichlorophenol was detected as the major intermediate compound of chlomethoxynil metabolism in the GLC chromatograms of culture extracts. It is suggested that 2,4- dichlorophenol is derived from the hydrolysis of the ether linkage of chlomethoxynil , 3–methoxy–4- nitrophenoll is presumed to be the other moiety resulting from the hydrolysis . 2,4 – Dichlorophenol is presumed to be further oxidized through known metabolic pathways , while 3 – methoxy – 4 – nitrophenol is nol derivative before ring fission .
The above results indicate that chlomethoxynil is hydrolysed easi – iy in the soil to less toxic compounds which are utilized by soil microor – ganisms for growth , and therefore the accumulation of this herbicide at the site of application is not be expected .
Publication year 1990
Pages 1553-1563
Organization Name
serial title Agricultural Research Review, printed in Egypt
Author(s) from ARC
External authors (outside ARC)
    أحمد محمود أبو العنين كلية الزراعة - جامعة القاهرة - قسم الكيمياء الحيوية
    محمد وفيق حبيب
AGROVOC
TERMS		 Metabolism. Microorganisms.
Proposed Agrovoc Co-metabolism;Chlomethoxynil herbicide;Egyptian soil;
Publication Type Journal
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