Effect of herbicide resistance endowing three ACCase mutations on seed germination and viability in American slough grass ( Beckmannia syzigachne Steud. Fernald)

Du, Long; Bai, Siqi; Li, Qi; Qu, Mingjing; Yuan, Guohui; Guo, Wenlei

doi:10.4067/s0718-58392017000200142

Cited by 7 publications

(11 citation statements)

References 32 publications

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“…In other words, plants containing Trp2027Cys ACCase showed a distinctly weaker competitive response to increasing wheat density, although no significant variation in plant growth was observed. In our previous study, the Trp2027Cys ACCase did not significantly affect seed germination (Du et al, ). Throughout the whole American sloughgrass growth period, fitness costs associated with the Trp2027Cys ACCase were detected only during the reproductive stage.…”

Section: Discussionmentioning

confidence: 72%

Fitness costs associated with acetyl‐coenzyme A carboxylase mutations endowing herbicide resistance in American sloughgrass (Beckmannia syzigachne Steud.)

Du¹,

Qu²,

Jiang³

et al. 2019

Ecology and Evolution

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Weed resistance to herbicide can be conferred by gene mutations, and some mutations can cause pleiotropic effects in some cases. We investigated the pleiotropic effects associated with five specific ACCase mutations (Ile1781Leu, Trp2027Cys, Ile2041Asn, Asp2078Gly, and Gly2096Ala) on the plant growth, seed production, and resource competitiveness in American sloughgrass. Resistant plants (M/M) homozygous for specific ACCase mutation and susceptible wild‐type plants (W/W) were derived from single heterozygous mother plant (M/W) by genotyping. Plant growth assay and neighborhood experiments were performed to quantify variation between M/M plants and W/W plants. The Ile1781Leu mutation resulted in slight increases in plant growth in pure stands and improved resource competitiveness under low‐competition conditions in pot experiments, but no clear variation was observed under high competitive pressure or field conditions. During competition with wheat plants under field conditions, American sloughgrass plants containing Ile2041Asn ACCase exhibited a significantly lower (12.5%) aboveground biomass but no distinct differences in seed production or resource competitiveness. No significant detrimental pleiotropic effects associated with Gly2096Ala were detected in American sloughgrass. The Trp2027Cys mutation distinctly reduced seed production, especially under high competitive pressure, but did not significantly alter plant growth. The Asp2078Gly mutation consistently reduced not only plant growth and seed production but also resource competitiveness. Synthesis . The Trp2027Cys and Asp2078Gly mutations led to significant fitness costs, which may reduce the frequency of resistance alleles and reduce the propagation speed of resistant weeds in the absence of ACCase inhibitor herbicides. The Ile1781Leu, Ile2041Asn, and Gly2096Ala mutations displayed no obvious fitness costs or displayed very small fitness penalties, which would likely have no effect on the establishment of resistant weeds in the field.

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Section: Discussionmentioning

confidence: 72%

Fitness costs associated with acetyl‐coenzyme A carboxylase mutations endowing herbicide resistance in American sloughgrass (Beckmannia syzigachne Steud.)

Du¹,

Qu²,

Jiang³

et al. 2019

Ecology and Evolution

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“…According to the results, Ile-2041-Asn mutation was responsible for the resistance to the ACCase inhibitor in winter wild oat from Iran. Various researchers have reported Ile-2041-Asn mutation in the ACCase encoding gene as a mechanism of resistance to ACCase inhibiting herbicides, including Papapanagiotou et al 30 , Du et al 19 , 32 , Shergill et al 33 , Anthimidou et al 34 , etc.…”

Section: Discussionmentioning

confidence: 99%

“…Salinity has adverse effects on plant germination, and the ability of germination in saline conditions is highly decisive for the establishment of weed species 39 . Du et al 19 reported that the germination of ACCase -resistant American slough grass biotypes under various salinity conditions varied depending on the mutation on the ACCase encoding gene. The biotype with Ile-1781-Leu mutation had a higher germination percentage compared to the susceptible biotype, whereas Trp-2027-Cys and Asn-2041-Ile mutations did not affect germination percentage.…”

Section: Discussionmentioning

confidence: 99%

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No fitness cost associated with Asn-2041-Ile mutation in winter wild oat (Avena ludoviciana) seed germination under various environmental conditions

Hassanpour-bourkheili

Gherekhloo

Kamkar

et al. 2021

Sci Rep

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Knowledge about the fitness cost imposed by herbicide resistance in weeds is instrumental in devising integrated management methods. The present study investigated the germination response of ACCase-resistant (R) and susceptible (S) winter wild oat under different environmental conditions. The DNA of the plants was sequenced after being extracted and purified. The segregated F2 seeds were subjected to various temperatures, water potentials, NaCl concentrations, different pHs, darkness conditions, and burial depths. The results of the sequencing indicated that Ile-2041-Asn mutation is responsible for the evolution of resistance in the studied winter wild oat plants. The seeds were able to germinate over a wide range of temperatures, osmotic potentials, NaCl concentrations, and pHs. Germination percentage of R and S seeds under dark and light conditions was similar and ranged from 86.3 to 88.3%. The highest emergence percentage for both R and S plants was obtained in 0, 1, and 2 cm depths and ranged from 66.6 to 70.3%. In overall, no differences were observed in the germination response between the R and S winter wild oat plants under all studied conditions. No fitness cost at seed level indicates that control of R winter wild oats is more difficult, and it is essential to adopt crop and herbicide rotation to delay the further evolution of resistance.

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“…Seeds were considered to have germinated when the coleoptile was visible (about 2 mm in length). Percent germination was determined 15 d after sowing (Rao et al, 2008;Wu et al, 2016;Du et al, 2017). All experiments were conducted in a completely randomized design with four replicates.…”

Section: Methodsmentioning

confidence: 99%

Environmental factors on seed germination and seedling emergence of Phleum paniculatum Huds.

Zhang

Chen

et al. 2018

Chil. j. agric. res.

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Phleum paniculatum Huds., commonly known as British timothy, is an increasingly serious weed in wheat field of China. However, the biology of its seed germination and seedling emergence remain unclear. In the present study, the effects of environmental factors on seed germination and seedling emergence of P. paniculatum were explored. Phleum paniculatum seeds had a shallow dormancy (20-30 d) when stored at room temperature (25 ± 5 °C). Seeds could germinate at constant temperatures between 10 and 25 °C, except for 5 or 30 °C. Light was not essential for seed germination, and pH values from 4 to 10 did not inhibit germination. Seeds were moderately adaptable to water potential and NaCl concentration, and germination rates would be decreased 50% when water potential was -0.4 MPa or NaCl concentration was 130 mM. Increased soil burial depth decreased the seedling emergence, and no seeds emerged when the burial depth was more than 4 cm. Taken together, our results provide useful information of the germination and emergence of P. paniculatum seed, and strategies such as proper drainage systems managed and deep plowing are recommended to limit its detrimental effects on agricultural production.

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Effect of herbicide resistance endowing three ACCase mutations on seed germination and viability in American slough grass ( Beckmannia syzigachne Steud. Fernald)

Cited by 7 publications

References 32 publications

Fitness costs associated with acetyl‐coenzyme A carboxylase mutations endowing herbicide resistance in American sloughgrass (Beckmannia syzigachne Steud.)

Fitness costs associated with acetyl‐coenzyme A carboxylase mutations endowing herbicide resistance in American sloughgrass (Beckmannia syzigachne Steud.)

No fitness cost associated with Asn-2041-Ile mutation in winter wild oat (Avena ludoviciana) seed germination under various environmental conditions

Environmental factors on seed germination and seedling emergence of Phleum paniculatum Huds.

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