Involvement of glutamine synthetase 2 (GS2) amplification and overexpression in Amaranthus palmeri resistance to glufosinate

Noguera, Matheus M.; Porri, Aimone; Werle, Isabel Schlegel; Heiser, James W.; Brändle, Frank; Lerchl, Jens; Murphy, Brent P; Betz, Michael; Gatzmann, Fanny; Penkert, Martin; Tuerk, Clara; Meyer, Lucie; Roma‐Burgos, Nilda

doi:10.1007/s00425-022-03968-2

Cited by 12 publications

(11 citation statements)

References 65 publications

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“…For example, RI values ranged from 2 to 8 in previously reported resistant populations of A. palmeri , , E. indica , ,, L.…”

Section: Discussionmentioning

confidence: 95%

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Eleusine indica Cytochrome P450 and Glutathione S-Transferase Are Linked to High-Level Resistance to Glufosinate

He,

Liu,

Chen

et al. 2023

J. Agric. Food Chem.

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“…For example, RI values ranged from 2 to 8 in previously reported resistant populations of A. palmeri , , E. indica , ,, L.…”

Section: Discussionmentioning

confidence: 95%

“…An increased copy number and overexpression of the GS2 gene are responsible for glufosinate resistance in A. palmeri. , Additionally, enhanced glufosinate metabolism may be involved in the resistance of L. multiflorum .…”

Section: Introductionmentioning

confidence: 99%

Eleusine indica Cytochrome P450 and Glutathione S-Transferase Are Linked to High-Level Resistance to Glufosinate

He,

Liu,

Chen

et al. 2023

J. Agric. Food Chem.

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“…ha −1 ) in this experiment compared with glufosinate‐resistant Palmer amaranth surviving much higher rates (> 220 g a.i. ha −1 ) (Noguera et al., 2022; Priess et al., 2022). These results provide further evidence that the offspring from Palmer amaranth surviving glufosinate do not exhibit reduced susceptibility to glufosinate.…”

Section: Resultsmentioning

confidence: 99%

Biological effects on Palmer amaranth surviving glufosinate

Jones

León

Everman

2022

Agrosystems Geosci & Env

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Palmer amaranth (Amaranthus palmeri S. Watson) is a difficult weed to manage due to competitive growth, fecundity, and evolved herbicide resistance. Limited information exist on the fecundity of vegetative stage Palmer amaranth surviving glufosinate applied at different timings. In addition, research has not investigated the germination or glufosinate susceptibility of the offspring from these surviving plants. Field experiments were conducted across three locations in 2019 to determine (a) the fecundity of Palmer amaranth plants surviving glufosinate applied at different vegetative growth stages, and (b) if the offspring from the surviving plants exhibited differential germination and susceptibility to glufosinate. Palmer amaranth was treated at three different vegetative sizes (5 cm, 7-10 cm, > 10 cm) and orthogonal combinations of these application timings. The application timings corresponded to early-, mid-and late-postemergence applications. Palmer amaranth plants surviving the mid-, late-, and the mid postemergence followed by late postemergence glufosinate application were fecund. Palmer amaranth plants surviving the mid postemergence followed by late postemergence application produced less seed than the plants surviving the mid postemergence and late postemergence application. Palmer amaranth was controlled with other glufosinate applications resulting in no seed production. Germination was affected across location and glufosinate treatments, but no clear trend/pattern was observed. The offspring from Palmer amaranth plants surviving glufosinate applications were controlled by all glufosinate rates tested. These experiments provide evidence that Palmer amaranth surviving glufosinate in the vegetative stages may remain fecund, but fecundity can vary with application timing. No measurable effect on the offspring germination or susceptibility to glufosinate was apparent.

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“…While the auxin herbicides (i.e., 2,4‐D and dicamba) effectively controlled the Surry County population, A. tuberculatus populations resistant to dicamba and 2,4‐D have been confirmed in the Midwest United States (Bobadilla et al, 2022; Shergill, Barlow, et al, 2018). Evolved resistance to glufosinate has been confirmed in A. palmeri in the midsouth United States and North Carolina (Heap, 2023; Noguera et al, 2022). While these herbicides will likely be effective for controlling the herbicide‐resistant A. tuberculatus populations found in North Carolina, farmers will need to steward these herbicides to reduce selection pressure (Matzrafi et al, 2020; Tehranchian et al, 2017).…”

Section: Discussionmentioning

confidence: 98%

Confirmation of a five‐way herbicide‐resistant Amaranthus tuberculatus population in North Carolina

et al. 2023

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Amaranthus tuberculatus (waterhemp) is a pervasive weed of the Mid‐west and ‐south United States and is not native to North Carolina but infestations in crop fields have been reported recently. Amaranthus tuberculatus has evolved resistance to seven herbicide groups and multiple herbicide‐resistant populations are common where the species is native. The reported A. tuberculatus infestations in North Carolina have not been controlled with herbicides but no formal herbicide resistance characterisation has been conducted to date. Glasshouse dose–response experiments were conducted to determine the susceptibility of a population collected from Surry County, North Carolina to commonly applied postemergence herbicides compared to a herbicide‐susceptible population collected from Story County, Iowa. The Surry County population survived labelled rates of imazethapyr, atrazine, glyphosate, fomesafen, and mesotrione; the Story County population was controlled with these herbicides. Further, 2,4‐D, dicamba, and glufosinate effectively controlled the Surry and Story County populations. Molecular sequencing assays were subsequently conducted to determine if altered target sites facilitated resistance in the acetolactate synthase (ALS), 5‐enolpyruvylshikimate‐3‐phosphate synthase (EPSPS), photosystem II (psbA), and protoporphyrinogen oxidase (PPX2) genes. The Surry County population carried a Trp574Leu and ∆Gly210 mutations in the ALS and PPX2 gene, respectively. No mutations that would confer resistance were found in the EPSPS or psbA gene for either population. The results of both experiments provide evidence that a five‐way herbicide‐resistant A. tuberculatus population has encroached North Carolina. More research is needed to determine the mechanisms of resistance to atrazine, glyphosate, and mesotrione.

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Involvement of glutamine synthetase 2 (GS2) amplification and overexpression in Amaranthus palmeri resistance to glufosinate

Cited by 12 publications

References 65 publications

Eleusine indica Cytochrome P450 and Glutathione S-Transferase Are Linked to High-Level Resistance to Glufosinate

Eleusine indica Cytochrome P450 and Glutathione S-Transferase Are Linked to High-Level Resistance to Glufosinate

Biological effects on Palmer amaranth surviving glufosinate

Confirmation of a five‐way herbicide‐resistant Amaranthus tuberculatus population in North Carolina

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