Action mechanisms of acetolactate synthase-inhibiting herbicides

Zhou, Qing-Yan; Liu, Weiping; Zhang, Yongsong; Liu, Kevin K.

doi:10.1016/j.pestbp.2007.04.004

Cited by 204 publications

(156 citation statements)

References 61 publications

Supporting

Mentioning

145

Contrasting

Unclassified

Order By: Relevance

“…This variability seems to be explained by the mode of action of the product in the plant and also by the capacity of the plant to detoxify themselves or metabolize the product. Sulfometuron-methyl belongs to the sulfonylurea chemical group, and its primary site of action consists in the inhibiting of the enzyme acetolactate synthase (ALS) or the enzyme acetohydroxyacid synthase (AHAS) thus interfering in synthesis of the essential amino acids valine, leucine, and isoleucine (Cox, 2002;Zhou et al, 2007). In the USA, this active ingredient is used mostly in nonagricultural situations and as a selective herbicide on conifer plantations, hardwood plantations, and turf (Cox, 2002) at high doses [up to 52.5 g ha −1 (Ahrens, 1994)].…”

Section: Discussionmentioning

confidence: 99%

Selectivity of the plant growth regulators trinexapac-ethyl and sulfometuron-methyl to cultivated species

Correia

Leite

2012

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

the aerial spraying of plant ripeners on sugar cane (Saccharum officinarum L.) crops causes often the contamination of neighboring areas, which subsidizes formal complaints from the neighbors. these contaminations are due to spraying taking place during inadequate environmental conditions or from technical mistakes during the application. One of the most important causes of this contamination is the susceptibility of the species being cultivated surrounding sugar cane.In order to evaluate the effects of sugar cane plant ripeners trinexapac-ethyl and sulfometuronmethyl on peanuts, cotton, potato, coffee, citrus, beans, sunflower, cassava, rubber, soybean, and grapes, eleven experiments -one for each species -were carried out from May 2009 to Jan.2010. the field experiment was set according to a completely random design with five treatments and four replications. Just before or during flowering, a single treatment of trinexapac-ethyl at 100 or 200 g ha -1 and sulfometuron-methyl at 7.5 or 15 g ha -1 was applied to plants. A control treatment (plants not treated) for each species was part of each experiment. trinexapac, at the doses of 100 and 200 g ha -1 , showed selectivity to peanuts, cotton, potato, coffee, citrus, sunflower, cassava, rubber, soybean, and grape. At the lowest dose (100 g ha -1 ), it was selective for bean.sulfometuron, at the dose of 7.5 g ha -1 , was selective for peanuts and, at the two studied doses (7.5 and 15 g ha -1 ), it was selective for coffee, citrus, cassava, and rubber.

show abstract

Section: Discussionmentioning

confidence: 99%

Selectivity of the plant growth regulators trinexapac-ethyl and sulfometuron-methyl to cultivated species

Correia

Leite

2012

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

show abstract

“…Imazamox and imazethapyr can inhibit acetolactate synthase activity and, consequently, the synthesis of branched chain amino acids valine, leucine and isoleucine (Zhou et al, 2007). It is known that such products have physical and chemical characteristics that allow for speedy absorption by plant cuticle and both apoplastic and symplastic translocation.…”

Section: Combined Discussion Of the Results Of Four Experimentsmentioning

confidence: 99%

Reduction of seed production of red rice escapes in clearfield rice

et al. 2013

View full text Add to dashboard Cite

-Roguing is a practice used to reduce the seed source of red rice escapes to control in Clearfield-rice areas. However, there is great difficulty in performing it in large and heavily infested rice fields. This objective of this work was to evaluate the effects of the use of imazamox herbicide, applied in different rates and times, on plants of Clearfield-rice and red rice. Four experiments were conducted during the 2007/08 and 2008/09 growing seasons, in completely randomized block design and treatments arranged in factorial design, using three replications per treatment. The treatments had increasing rates of imazamox, application times and rice cultivars. The rice cultivars tested were IRGA 417, IRGA 422 CL, Avaxi CL and Puitá INTA CL. The variables evaluated were the number of panicles m -2 , number of grains panicle -1 , spikelet sterility in rice and red rice; and, rice grain yield and its components. The imazamox reduced the seed production of red rice escapes in a simulated situation of commercial Clearfield-rice area. The greater percentage reductions were obtained when this herbicide was applied at final formation of the panicle or panicle exertion of the red rice plant escapes to control. The Puitá INTA CL cultivar has high level of resistance to imazamox, independent of rate and application times tested, becoming the only alternative to the use of this practice. Keywords

show abstract

“…Inhibition of ALS results in deficiency of the amino acid pool and triggers a decrease in protein biosynthesis, which eventually leads to reduced rate of cell division. This process eventually kills the plants after showing symptoms in meristematic tissues where biosynthesis of amino acids primarily takes place [41].…”

Section: Metabolism and Selectivity Of Acetolactate Synthase (Als) Inmentioning

confidence: 99%

Herbicide Metabolism in Weeds — Selectivity and Herbicide Resistance

Jablonkai¹

2015

Herbicides, Physiology of Action, and Safety

View full text Add to dashboard Cite

The metabolic detoxication/bioactivation pathways, the levels and activity of enzymes, and endogenous cofactors mediating these reactions in crops have been well documented; however, much less evidence has been accumulated in weed species. The herbicide metabolism as a selectivity factor is summarized with special attention to acetyl-CoA carboxylases (ACCase)-inhibiting aryloxyphenoxypropionate, protoporphyrinogen IX oxidase (PPO) inhibitor, carotenoid biosynthesis inhibitor clomazone, and acetolactate synthase (ALS) inhibitor imidazolinone and sulfonylurea herbicides in various weed species. The metabolism-based herbicide resistance related to these herbicide classes is also discussed along with the role and level of metabolizing enzymes and cofactors in weed species.

show abstract

Action mechanisms of acetolactate synthase-inhibiting herbicides

Cited by 204 publications

References 61 publications

Selectivity of the plant growth regulators trinexapac-ethyl and sulfometuron-methyl to cultivated species

Selectivity of the plant growth regulators trinexapac-ethyl and sulfometuron-methyl to cultivated species

Reduction of seed production of red rice escapes in clearfield rice

Herbicide Metabolism in Weeds — Selectivity and Herbicide Resistance

Contact Info

Product

Resources

About