Table 3 Absorption and translocation percentage (%Trans.) of 14C-imazamox (from the total absorbed) from 3 to 96 hours after treatment in two E. heterophylla biotypes (S, susceptible; R, resistant) grown in a hydroponic systems.

From: Target site as the main mechanism of resistance to imazamox in a Euphorbia heterophylla biotype

%Trans.

Biotype

Hours after treatment

3

6

12

24

48

96

Absorption

(% total applied)

S

92.4 ± 4.2Aa

94.3 ± 3.3Aa

98.3 ± 3.0Aa

98.9 ± 2.3Aa

98.9 ± 2.6Aa

98.9 ± 2.0Aa

R

93.7 ± 3.2Aa

95.2 ± 2.6Aa

98.2 ± 3.1Aa

98.6 ± 3.0Aa

98.8 ± 3.0Aa

98.9 ± 3.1Aa

Treated leaf

S

88.5 ± 2.7Aa

84.7 ± 3.1ABa

70.8 ± 4.9Ca

45.0 ± 3.2Ea

22.0 ± 1.6Fdef

22.8 ± 3.4Fc

R

84.0 ± 2.7ABa

78.0 ± 1.6Bb

53.6 ± 1.5Db

45.4 ± 2.2Ea

19.6 ± 2.7Ffg

7.0 ± 1.0Ge

Shoots

S

6.5 ± 1.2Eb

7.7 ± 1.4Ede

11.4 ± 3.0De

25.5 ± 3.0ABb

29.5 ± 5.4Abcd

22.6 ± 1.7Bc

R

9.8 ± 2.2DEb

12.0 ± 2.1Dc

21.3 ± 2.3Bc

22.6 ± 3.8Bbc

22.5 ± 1.4Bdef

15.6 ± 0.7Cd

Roots

S

3.1 ± 2.5Gcd

5.6 ± 1.8FGe

15.7 ± 1.8BCDd

23.6 ± 0.8Abc

20.4 ± 3.7ABefg

14.6 ± 1.7CDd

R

4.2 ± 1.2FGc

7.9 ± 1.6EFde

21.9 ± 3.9ABc

24.0 ± 3.8Abc

16.8 ± 1.4BCg

7.3 ± 0.5EFe

Exuded

S

1.9 ± 0.1GHd

1.8 ± 0.3GHf

1.9 ± 0.3GHf

5.7 ± 0.5Ee

26.2 ± 1.9Ccd

37.6 ± 2.2Bb

R

1.6 ± 0.3Hd

1.8 ± 0.4GHf

2.4 ± 0.5FGf

8.1 ± 0.2Dd

39.7 ± 2.2Ba

64.8 ± 5.5Aa

  1. ±Standard error of the mean (n = 3). Means followed by the same lowercase per column (translocation of 14C-imazamox within a time evaluated) or uppercase per double plant section row (translocation of 14C-imazamox between biotypes at different time intervals) does not differ by the Tukey test (P < 0.05).
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