Table 4. Amino acid substitutions within plastidic, homomeric ACC and associated cross-resistance patterns observed at the whole plant levela.
|
|
|
|
Resistancea |
References |
||||||||
|
Amino acid residueb |
|
APPsc |
CHDsd |
|
||||||||
|
Wild-type |
Resistant |
Weed species |
Cd |
Dc |
Fx |
Fz |
Hx |
Ct |
Cx |
Sx |
Tk |
|
|
Ile1781 |
Leu |
A. myosuroides |
S |
R |
R |
R |
S |
S |
R |
R |
R |
Délye et al. 2002b, unpublished data; Moss et al. 2003 |
|
|
Leu |
A. fatua |
ND |
R |
ND |
ND |
ND |
ND |
ND |
R |
ND |
Christoffers et al. 2002 |
|
|
Leu |
S. viridis |
ND |
R |
R |
ND |
ND |
ND |
ND |
R |
R |
Délye et al. 2002c; Heap and Morrison 1996 |
|
|
Leu |
Lolium sp. |
S |
R |
R |
ND |
ND |
ND |
R |
ND |
ND |
Délye et al. 2002b; Tal and Rubin 2004 |
|
Trp2027 |
Cys |
A. myosuroides |
R |
ND |
R |
ND |
R |
S |
S |
ND |
ND |
Délye et al. in press |
|
Ile2041 |
Asn |
A. myosuroides |
R |
ND |
R |
ND |
R |
S |
S |
ND |
ND |
Délye et al. 2003 |
|
|
Asn |
Lolium sp. |
R |
R |
ND |
ND |
R |
ND |
S |
ND |
ND |
Délye et al. 2003 |
|
|
Val |
Lolium sp |
S |
ND |
ND |
ND |
R |
ND |
S |
ND |
ND |
Délye et al. 2003 |
|
Asp2078 |
Gly |
A. myosuroides |
R |
ND |
R |
ND |
R |
R |
R |
ND |
ND |
Délye et al. in press |
|
Gly2096 |
Ala |
A. myosuroides |
R |
ND |
R |
ND |
R |
S |
S |
ND |
ND |
Délye et al. in press |
a S and R respectively indicate that plants containing at least one copy of the ACC mutant allele are sensitive or resistant to the corresponding herbicide either in the field or in bioassays (see text for comment). ND, not determined at the whole plant level.
b Amino acid number is standardized to A. myosuroides plastidic, homomeric ACC (EMBL accession AJ310767).
c Cd, clodinafop; Dc, diclofop; Fx, fenoxaprop; Fz, fluazifop; Hx, haloxyfop.
d Ct, clethodim; Cx, cycloxydim; Sx; sethoxydim; Tk, tralkoxydim.