Pesticide Metabolism in Plants
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oHNCN'CHS
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CI
~: CI
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o
0
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.... CH1OH
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HNCN'H
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oHNC 'H
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CI
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,------ J_ ---------------1
: METHANOl-INSOLU BlE I
:
RESIDUE
:
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~ H5' -' J I
L. ______________________ .. ___ J
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i
o
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C5~---H . . . .
CI
? ... CHs
~
HNCN,CHs
:/,
:-...
CI
o HN"'CHS
if CI
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~
in
.. 0
3 C!>
"UDPG' GlUCOSYl I
TRANSFERASE"
"MICROSOMAL
N-DEMETHYlASE"
"MICROSOMAL
ARYL HYDROXYLASE"
"UDPG'GLUCOSYl
TRANSFERASE"
Figure 2.7. N-demethylation and aryl hydroxylation of monuron in cotton.
0
IIN:"" CH 3
0
" .... CH 3
NAOH
NAO+
33
o~~ :/" I + O 2 + or + H+
• o~+ H 2 O + or + HCHO
~
NAOPH
NAOP+
CI
CI
0
0
" .... CH 3
" .... CHi>H
0" +
NAOH
H+
¢'"
O2 + or +
•
NAO+
NADPH
+ H2O + or
NAOP+
CI
CI
0
L" (¢D"' + HCHO
CI
Figure 2.8. The mechanism of monuron N-demethylation by microsomal mfo from cotton.
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in
8 • i
~
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[
~tt'CHIO]
? ... CHS
O
HN 'cHS
!
oHNCN'CHS
I
: - . . . , ~ :-...' ---i,,....,.i
i
CI
~: CI
!
o
0
i
.... CH1OH
I
,,~HS'
O
HNCN'H
i
oHNC 'H
I
:/ ,
•
I i
:/ I __ +1.; ........
:-...
.:-...
I
CI
i
CI
,------ J_ ---------------1
: METHANOl-INSOLU BlE I
:
RESIDUE
:
i
i
I
~ H5' -' J I
L. ______________________ .. ___ J
I
i
o
"
C5~---H . . . .
CI
? ... CHs
~
HNCN,CHs
:/,
:-...
CI
o HN"'CHS
if CI
?
in
.. 0
3 C!>
"UDPG' GlUCOSYl I
TRANSFERASE"
"MICROSOMAL
N-DEMETHYlASE"
"MICROSOMAL
ARYL HYDROXYLASE"
"UDPG'GLUCOSYl
TRANSFERASE"
Figure 2.7. N-demethylation and aryl hydroxylation of monuron in cotton.
0
IIN:"" CH 3
0
" .... CH 3
NAOH
NAO+
33
o~~ :/" I + O 2 + or + H+
• o~+ H 2 O + or + HCHO
~
NAOPH
NAOP+
CI
CI
0
0
" .... CH 3
" .... CHi>H
0" +
NAOH
H+
¢'"
O2 + or +
•
NAO+
NADPH
+ H2O + or
NAOP+
CI
CI
0
L" (¢D"' + HCHO
CI
Figure 2.8. The mechanism of monuron N-demethylation by microsomal mfo from cotton.
