Inhibition of corn acetyl-CoA carboxylase by cyclohexanedione and aryloxyphenoxypropionate herbicides

Cross-resistance patterns of winter wild oat (Avena ludoviciana) populations to ACCase inhibitor herbicides

“…They belong to three chemical families: aryloxyphenoxypropionates (APPs, fops), cyclohexanediones (CHDs, dims), and phenylpyrazolin (PPZ, dens) (Secor et al 1989;Hofer et al 2006). These herbicides block the first step in the synthesis of fatty acids in the Gramineae by the inhibition of their chloroplastic acetyl-CoA carboxylase (ACCase) causing plant death (Burton et al 1989). Since their introduction in the late 1970s (APPs) and 1980s (CHDs), the ACC-inhibiting herbicides have been widely used worldwide to control a number of grass weed species (Devine and Shimabukuro 1994).…”

Effects of Diclofop and Diclofop-Methyl on Membrane Potentials in Roots of Intact Oat, Maize, and Pea Seedlings

“…However, insensitivity to the aryloxy phenoxy propionic acid herbicides in dicots has been reported to closely correspond with a lack of an inhibitory effect on fatty acid synthesis (8) and acetyl-CoA carboxylase activity in dicots (2, 3). Burton et al (3) reported that acetyl-CoA carboxylase in pea chloroplasts was more than 1000 times less sensitive to diclofop acid than was the same enzyme in maize chloroplasts. Resistance to these herbicides also has been reported in grasses.…”

Expression of the Acc1 Gene-Encoded Acetyl-Coenzyme A Carboxylase in Developing Maize (Zea mays L.) Kernels

“…Desalted extracts were used immediately for assays and were then stored in liquid nitrogen for further assays if required. (Burton et al, 1989;Marshall et al, 1992). ACCase activity was expressed as nmol of HCO; incorporated mg-' min-I.…”

“…Altematively, the same gene product may be expressed at different levels in different tissues due either to differential transcription rates or to posttranscriptional regulation. Sethoxydim is lethal to maize and other monocot plants because of inhibition of ACCase in vegetative tissues (Burton et al, 1987(Burton et al, , 1989. The herbicide inhibits ["C] acetate incorporation into lipids in maize chloroplasts (Hoppe and Zacher, 1985;Burton et al, 1987), root tips (Hosaka and Takagi, 1987), and tissue cultures (Parker et al, 1990b).…”