scholarly journals Impact of Biotic and Abiotic Stresses on the Competitive Ability of Multiple Herbicide Resistant Wild Oat (Avena fatua)

PLoS ONE ◽  
2013 ◽  
Vol 8 (5) ◽  
pp. e64478 ◽  
Author(s):  
Erik A. Lehnhoff ◽  
Barbara K. Keith ◽  
William E. Dyer ◽  
Fabian D. Menalled
Keyword(s):  
Abiotic Stresses ◽  
Competitive Ability ◽  
Avena Fatua ◽  
Wild Oat ◽  
Biotic And Abiotic Stresses ◽  
Herbicide Resistant

Influence of tillage, vertical seed distribution, and pyroxasulfone application timing and rate on control of wild oat (Avena fatua L.)

2018 ◽  
Vol 98 (3) ◽  
pp. 601-608 ◽  
Author(s):  
Amy R. Mangin ◽  
Linda M. Hall ◽  
Jeff J. Schoenau ◽  
Hugh J. Beckie
Keyword(s):  
Avena Fatua ◽  
Vertical Position ◽  
Wild Oat ◽  
Weed Seed ◽  
Application Timing ◽  
Herbicide Resistant ◽  
Oat Seeds ◽  
Tillage System ◽  
Seed Distribution ◽  
Oat Biomass

Tillage and new herbicide options may be necessary for the control of herbicide-resistant wild oat. The efficacy of soil-applied herbicides such as pyroxasulfone can be influenced by edaphic factors and weed seed recruitment depth, which varies with tillage system. We investigated the effect of tillage and pyroxasulfone rate when applied in the fall and spring on wild oat biomass at three locations in Alberta in 2014–2015. The vertical position of wild oat seeds, with and without tillage, was examined at each site. Wild oat biomass was greater in untilled plots compared with plots with fall tillage at all locations. In two out of three locations, pyroxasulfone efficacy was superior when applied in the fall compared with spring, possibly influenced by low spring rainfall. A single tillage pass at the Edmonton and Kinsella locations did not affect wild oat seed distribution, but there was an increase in seeds present in the surface layer in the untilled treatment at Lacombe. Tillage, used in combination with soil-applied herbicides, may be an option to achieve acceptable control of herbicide-resistant wild oat.

Inheritance of multiple herbicide resistance in wild oat (Avena fatua L.)

2006 ◽  
Vol 86 (1) ◽  
pp. 317-329 ◽  
Author(s):  
Jocelyn D Karlowsky ◽  
Anita L Brûlé-Babel ◽  
Lyle F Friesen ◽  
Rene C Van Acker ◽  
Gary H Crow
Keyword(s):  
Herbicide Resistance ◽  
Nuclear Gene ◽  
Avena Fatua ◽  
Multiple Resistance ◽  
Western Canada ◽  
Wild Oat ◽  
Herbicide Resistant ◽  
Insight Into ◽  
Resistance Genetics ◽  
Multiple Herbicide Resistance

To gain some insight into the surprisingly frequent occurrence of multiple herbicide resistant wild oat in western Canada, the inheritance of multiple herbicide resistance was studied in two wild oat (Avena fatua L.) populations, UMWO12-01 and UMWO12-03, from Manitoba, Canada. Both populations are resistant to each of three distinct herbicides, imazametha benz-methyl, flamprop-methyl, and fenoxaprop-p-ethyl (hereafter referred to as imazamethabenz, flamprop, and fenoxaprop-P, respectively). Crosses were made between each resistant (R) population and a susceptible (S) wild oat population (UM5) (R/S crosses), and between the two resistant populations (R/R crosses). Subsets of parental, F2 plants, and F2-derived F3 (F2:3) families were treated separately with each of the three herbicides and classified as R or S for individual plants, and homozygous R, segregating, or homozygous S for F2:3 families. F2 plants and F2:3 families from R/S crosses segregated in 3R:1S and 1 homozygous R:2 segregating:1 homozygous S ratios, respectively. These ratios indicate that a single dominant or semi-dominant nuclear gene controls resistance to each of these herbicides in each population. F2 plants and F2:3 families from R/R crosses segregated for resistance/susceptibility when treated with either imazamethabenz or flamprop. Therefore, the genes for resistance to these two herbicides are different in each R population. Individual F2:3 family response demonstrated that the genes were not independent of each other, indicating possible linkage between the genes for resistance to each herbicide. Genetic linkage could explain how the wild oat populations developed multiple resistance in the absence of selection by two of the herbicides, imazamethabenz and flamprop. Key words: Wild oat, Avena fatua, herbicide resistance, genetics of resistance, multiple resistance

Nature, Occurrence, and Cost of Herbicide-Resistant Wild Oat (Avena fatua) in Small-Grain Production Areas

1999 ◽  
Vol 13 (3) ◽  
pp. 612-625 ◽  
Author(s):  
Hugh J. Beckie ◽  
A. Gordon Thomas ◽  
Anne Légère ◽  
David J. Kelner ◽  
Rene C. van Acker ◽  
...  
Keyword(s):  
Great Plains ◽  
Cropping Systems ◽  
Acetolactate Synthase ◽  
Avena Fatua ◽  
Northern Great Plains ◽  
Wild Oat ◽  
Herbicide Resistant ◽  
Multiple Group ◽  
Production Areas ◽  
Group 1

Surveys were conducted across the northern Great Plains of Canada in 1996 and 1997 to determine the nature and occurrence of herbicide-resistant (HR) biotypes of wild oat (Avena fatua). The surveys indicated that resistance to acetyl-CoA carboxylase (ACCase) inhibitors (Group 1) occurred most frequently relative to other herbicide groups. Group 1-HR wild oat occurred in over one-half of fields surveyed in each of the three prairie provinces. Of particular concern was the relatively high incidence of multiple-group resistance in wild oat in Saskatchewan and Manitoba. In Saskatchewan, 18% of Group 1-HR populations were also resistant to acetolactate synthase inhibitors (imidazolinones), even though these herbicides were not frequently used. In Manitoba, 27% of fields surveyed had wild oat resistant to herbicides from more than one group. Four populations were resistant to all herbicides registered for use in wheat (Triticum aestivum). Depending on the nature of resistance in wild oat, alternative herbicides available for their control may substantially increase costs to the grower. The cost to growers of managing HR wild oat in Saskatchewan and Manitoba using alternative herbicides is estimated at over $4 million annually. For some HR biotypes, alternative herbicides either are not available or all have the same site of action, which restricts crop or herbicide rotation options and threatens the future sustainability of small-grain annual cropping systems where these infestations occur.

Patch Management of Herbicide-Resistant Wild Oat (Avena fatua)

2005 ◽  
Vol 19 (3) ◽  
pp. 697-705 ◽  
Author(s):  
Hugh J. Beckie ◽  
Linda M. Hall ◽  
Barclay Schuba
Keyword(s):  
Seed Dispersal ◽  
Seed Bank ◽  
Management Practices ◽  
Cropping System ◽  
Avena Fatua ◽  
Western Canada ◽  
Wild Oat ◽  
Herbicide Resistant ◽  
Combine Harvester ◽  
Over Time

A study was conducted at a 64-ha site in western Canada to determine how preventing seed shed from herbicide-resistant wild oat affects patch expansion over a 6-yr period. Seed shed was prevented in two patches and allowed to occur in two patches (nontreated controls). Annual patch expansion was determined by seed bank sampling and mapping. Crop management practices were performed by the grower. Area of treated patches increased by 35% over the 6-yr period, whereas nontreated patches increased by 330%. Patch expansion was attributed mainly to natural seed dispersal (nontreated) or seed movement by equipment at time of seeding (nontreated and treated). Extensive seed shed from plants in nontreated patches before harvest or control of resistant plants by alternative herbicides minimized seed movement by the combine harvester. Although both treated and nontreated patches were relatively stable over time in this cropping system, preventing seed production and shed in herbicide-resistant wild oat patches can markedly slow the rate of patch expansion.

scholarly journals Evaluation of panicle removal methods and crop topping applications as supplemental tools for wild oat (Avena fatua) management

2021 ◽  
pp. 1-36
Author(s):  
Breanne D. Tidemann ◽  
K. Neil Harker ◽  
Steve J. Shirtliffe ◽  
Christian J. Willenborg ◽  
Eric N. Johnson ◽  
...  
Keyword(s):  
Crop Yield ◽  
Management Strategies ◽  
Field Studies ◽  
Avena Fatua ◽  
Optimal Timing ◽  
Wild Oat ◽  
Herbicide Application ◽  
Herbicide Resistant ◽  
Early Crop ◽  
Industry Standard

Abstract Increased frequency and occurrence of herbicide-resistant biotypes heightens the need for alternative wild oat management strategies. There is an opportunity to exploit the height differential between wild oat and crops by targeting wild oat between panicle emergence and seed shed timing. Two field studies were conducted either in Lacombe, AB, or Lacombe, AB and Saskatoon, SK from 2015-2017. In the first study, we compared panicle removal methods: hand clipping, use of a hedge trimmer and a selective herbicide crop topping application to a weedy check and an industry standard in-crop herbicide application in wheat. These treatments were tested early (at panicle emergence), late (at initiation of seed shed) or in combination at one location over three years. In the second study, we investigated optimal timing of panicle removal via a hedge trimmer with weekly removals in comparison to a weedy check in wheat and lentil. This study was conducted at two locations, Lacombe, AB and Saskatoon, SK over three years. Among all the tested methods, the early crop topping treatment consistently had the largest impact on wild oat density, dockage, seedbank and subsequent year crop yield. The early (at panicle emergence) or combination of the early and late (at initiation of seed shed) treatments tended to reduce wild oat populations the following season the most compared to the late treatments. Subsequent wild oat populations were not influenced by panicle removal timing, but only by crop and location interactions. Panicle removal timing did significantly affect wild oat dockage in the year of treatment but no consistent optimal timing could be identified. However, the two studies together highlight a number of additional questions to be investigated, as well as the opportunity to manage wild oat seedbank inputs at the panicle emergence stage of the wild oat lifecycle.

Barban Selectivity for Wild Oat in Wheat

Weed Science ◽  
1974 ◽  
Vol 22 (5) ◽  
pp. 476-480 ◽  
Author(s):  
Robert W. Neidermyer ◽  
John D. Nalewaja
Keyword(s):  
Triticum Aestivum ◽  
Air Temperature ◽  
Leaf Blade ◽  
Plant Morphology ◽  
Treatment Temperature ◽  
Avena Fatua ◽  
Post Treatment ◽  
Wild Oat ◽  
Wheat Growth ◽  
Wild Oats

The response of wheat (Triticum aestivum L.) and wild oat (Avena fatua L.) to barban (4-chloro-2-butynyl-m-chlorocarbanilate) was studied as influenced by plant morphology and air temperature after application. Growth of wheat and wild oat seedlings was reduced by barban at 0.3 μg and 0.6 μg applied to the first node, respectively. Barban application to the base and midpoint of the first leaf blade required a lower dose to reduce wild oat growth than wheat growth. Increased tillering occurred from barban injury to the main culm in wheat. Wheat and wild oat susceptibility to barban increased as the post-treatment temperature decreased from 32 to 10 C. Barban selectivity for wild oats in wheat was greater at 27 and 21 C than at 16 and 10 C.

scholarly journals An R2R3-type myeloblastosis transcription factor MYB103 is involved in phosphorus remobilization

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Fangwei Yu ◽  
Shenyun Wang ◽  
Wei Zhang ◽  
Hong Wang ◽  
Li Yu ◽  
...  
Keyword(s):  
Cell Wall ◽  
Transcription Factor ◽  
Abiotic Stresses ◽  
Myb Transcription Factor ◽  
Ethylene Signaling ◽  
Biotic And Abiotic Stresses ◽  
P Deficiency ◽  
P Concentration ◽  
Increased Sensitivity

Abstract The members of myeloblastosis transcription factor (MYB TF) family are involved in the regulation of biotic and abiotic stresses in plants. However, the role of MYB TF in phosphorus remobilization remains largely unexplored. In the present study, we show that an R2R3 type MYB transcription factor, MYB103, is involved in phosphorus (P) remobilization. MYB103 was remarkably induced by P deficiency in cabbage (Brassica oleracea var. capitata L.). As cabbage lacks the proper mutant for elucidating the mechanism of MYB103 in P deficiency, another member of the crucifer family, Arabidopsis thaliana was chosen for further study. The transcript of its homologue AtMYB103 was also elevated in response to P deficiency in A. thaliana, while disruption of AtMYB103 (myb103) exhibited increased sensitivity to P deficiency, accompanied with decreased tissue biomass and soluble P concentration. Furthermore, AtMYB103 was involved in the P reutilization from cell wall, as less P was released from the cell wall in myb103 than in wildtype, coinciding with the reduction of ethylene production. Taken together, our results uncover an important role of MYB103 in the P remobilization, presumably through ethylene signaling.

Characterization of Nucleotide Binding ­Site-Encoding Genes in Sweetpotato, Ipomoea batatas(L.) Lam., and Their Response to Biotic and Abiotic Stresses

2021 ◽  
pp. 1-15
Author(s):  
Zengzhi Si ◽  
Yake Qiao ◽  
Kai Zhang ◽  
Zhixin Ji ◽  
Jinling Han
Keyword(s):  
Binding Site ◽  
Abiotic Stresses ◽  
Ipomoea Batatas ◽  
Expression Profiles ◽  
Nucleotide Binding ◽  
Regulatory Elements ◽  
Nucleotide Binding Site ◽  
Biotic And Abiotic Stresses ◽  
Encoding Genes

Sweetpotato, <i>Ipomoea batatas</i> (L.) Lam., is an important and widely grown crop, yet its production is affected severely by biotic and abiotic stresses. The nucleotide binding site (NBS)-encoding genes have been shown to improve stress tolerance in several plant species. However, the characterization of NBS-encoding genes in sweetpotato is not well-documented to date. In this study, a comprehensive analysis of NBS-encoding genes has been conducted on this species by using bioinformatics and molecular biology methods. A total of 315 NBS-encoding genes were identified, and 260 of them contained all essential conserved domains while 55 genes were truncated. Based on domain architectures, the 260 NBS-encoding genes were grouped into 6 distinct categories. Phylogenetic analysis grouped these genes into 3 classes: TIR, CC (I), and CC (II). Chromosome location analysis revealed that the distribution of NBS-encoding genes in chromosomes was uneven, with a number ranging from 1 to 34. Multiple stress-related regulatory elements were detected in the promoters, and the NBS-encoding genes’ expression profiles under biotic and abiotic stresses were obtained. According to the bioinformatics analysis, 9 genes were selected for RT-qPCR analysis. The results revealed that <i>IbNBS75</i>, <i>IbNBS219</i>, and <i>IbNBS256</i> respond to stem nematode infection; <i>Ib­NBS240</i>, <i>IbNBS90</i>, and <i>IbNBS80</i> respond to cold stress, while <i>IbNBS208</i>, <i>IbNBS71</i>, and <i>IbNBS159</i> respond to 30% PEG treatment. We hope these results will provide new insights into the evolution of NBS-encoding genes in the sweetpotato genome and contribute to the molecular breeding of sweetpotato in the future.

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