Acetolactate synthase mutation conferring imidazolinone-specific herbicide resistance in Amaranthus hybridus

Trucco, Federico; Hager, Aaron G.; Tranel, Patrick J.

doi:10.1016/j.jplph.2005.06.015

Cited by 30 publications

(16 citation statements)

References 18 publications

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“…Our results agree with a number of other reports confirming that the enzyme's reduced sensitivity was the cause of resistance of various weed species to ALS inhibitors (Sprague et al, 1997;Sibony et al, 2001;Jander et al, 2003;Osuna and de Prado, 2003;Duran-Prado et al, 2004;Hanson et al, 2004;Maertens et al, 2004;Park and Mallory-Smith, 2004;McNaughton et al, 2005;Trucco et al, 2006). A high level of tolerance of the T hybrid as compared to an S hybrid, was confirmed based on several vegetative measurements and examination of the in vivo ALS activity, and further proved by a decrease in total shoot fresh weight of the susceptible hybrid.…”

Section: Figure 3: Als In Vivo Activity In S and T Hybrids After Treasupporting

confidence: 92%

Tolerance of sunflower (Helianthus annuus L.) to imazethapyr

Vrbničanin

Božić

Malidža

et al. 2008

Helia

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The response of RIMI [imazethapyr-tolerant (T)] sunflower (Helianthus annuus L.) hybrid and the local imazethapyr-sensitive hybrid "Zoltan" (S) was investigated under controlled conditions. Hybrids grown in pots were treated post-emergence with imazethapyr at the two pairs of leaves stage. Visual injury evaluation and vegetative parameters were recorded. ALS (acetolactate synthase) enzyme activity was estimated in vivo 24 h after imazethapyr application. Tolerance level was determined based on the resistance ratio index (ED 50 -herbicide dose causing 50% growth inhibition of T hybrid/ ED 50 of S hybrid). Significant differences were noted between the hybrids in the in vivo ALS activity and vegetative parameters. Indexes of resistance ranged between 5 and 452 for vegetative parameters, whereas the index for ALS activity was 210. The data confirmed the high level of tolerance of the hybrid Rimi as compared with the hybrid Zoltan.

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Section: Figure 3: Als In Vivo Activity In S and T Hybrids After Treasupporting

confidence: 92%

Tolerance of sunflower (Helianthus annuus L.) to imazethapyr

Vrbničanin

Božić

Malidža

et al. 2008

Helia

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“…Resistance‐endowing mutations at Pro‐197, Trp‐574 and Ser‐653 have been found in biotypes of many resistant weed species,9 whereas resistance mutations at the other positions are less common 2. For example, the only known resistance‐endowing mutation at Ala‐122 (Ala‐122‐Thr) has been reported in just five weed species( Xanthium strumarium ,21 Solanum ptycanthum ,22 Amaranthus retroflexus, 17 A. powellii 17 and A. hybridus 23, 24) and confers high‐level resistance to IMI but no resistance to SU and TP herbicides. The present study reports for the first time a double nucleotide mutation (GCT to TAT) in the plant ALS gene, resulting in Ala substitution by Tyr at position 122 and conferring high‐level and broad‐spectrum resistance across ALS herbicides.…”

Section: Discussionmentioning

confidence: 99%

A novel amino acid substitution Ala‐122‐Tyr in ALS confers high‐level and broad resistance across ALS‐inhibiting herbicides

Han

Purba

et al. 2012

Pest Management Science

115

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The molecular basis of ALS-inhibiting herbicide resistance in wild radish population WARR30 was identified to be due to an Ala-122-Tyr mutation in the ALS gene. This is the first report of an amino acid substitution at Ala-122 in the plant ALS that confers high-level and broad-spectrum resistance to ALS-inhibiting herbicides, a remarkable contrast to the known mutation Ala-122-Thr endowing resistance to imidazolinone herbicide.

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“…Consequently the plant could have potential for reducing heavy metal pollution in soil. Researchers have reported the nutritive value [17], endophytic fungi [18] and acetolactate synthase [19] of Amaranthus species but there are few reports of the tolerance and accumulation characteristics of Cd in A. hybridus.…”

Section: Introductionmentioning

confidence: 99%

Tolerance and accumulation characteristics of cadmium in Amaranthus hybridus L.

Zhang

et al. 2010

Journal of Hazardous Materials

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Acetolactate synthase mutation conferring imidazolinone-specific herbicide resistance in Amaranthus hybridus

Cited by 30 publications

References 18 publications

Tolerance of sunflower (Helianthus annuus L.) to imazethapyr

Tolerance of sunflower (Helianthus annuus L.) to imazethapyr

A novel amino acid substitution Ala‐122‐Tyr in ALS confers high‐level and broad resistance across ALS‐inhibiting herbicides

Tolerance and accumulation characteristics of cadmium in Amaranthus hybridus L.

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