First report of resistance to acetolactate‐synthase‐inhibiting herbicides in yellow nutsedge (<i>Cyperus esculentus</i>): confirmation and characterization

Tehranchian, Parsa; Norsworthy, Jason K.; Nandula, Vijay K.; McElroy, Scott; Chen, Shu; Scott, Robert C.

doi:10.1002/ps.3922

Cited by 26 publications

(25 citation statements)

References 24 publications

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“…Certain genetically modified (GM) crop plants, which may inadvertently come in the path of the herbicides (carry-over) may able to overcome the harmful effects of these herbicides [11,84,85]. Cross-resistance is another concerning issue in agriculture and related industries as some weeds and pests have acquired resistance to several herbicides, which are related by their mode of action [86][87][88]. For example, herbicides belonging to separate chemical families but within the same mode of action [e.g., acetolactate synthase (ALS) inhibitors] may acquire herbicide resistance against both the chemical families.…”

Section: Herbicide Resistancementioning

confidence: 99%

Modes of Action of Different Classes of Herbicides

Sherwani¹,

Arif²,

Khan³

2015

Herbicides, Physiology of Action, and Safety

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The mode of action of herbicides is important for understanding the management, classification, organization, and hierarchy of the herbicides. It also provides an insight into herbicide resistance, which continues to be a problem in sustainable agricultural management. The overuse of herbicides, just like other pesticides such as insecticides, has led to increased development of resistance among weeds, causing injury and destruction of useful plants in agriculture, land management, and other related industries. This chapter focuses on the main theme while providing in-depth analysis of the different modes of action of various classes of herbicides. The modes of action of herbicides are as variable as their chemical compositions as they focus on controlling susceptible plants through various biochemical means. Depending upon the specific mode of action at work, it may involve a plant enzyme or a biological system that the herbicide may interrupt, thus injuring or disrupting the regular plant growth and development and causing eventual plant death. Having an in-depth knowledge of the mode of action of herbicides is important in choosing a specific herbicide for a specific crop, understanding the injury symptoms, and devising an appropriate crop-management strategy.

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Section: Herbicide Resistancementioning

confidence: 99%

Modes of Action of Different Classes of Herbicides

Sherwani¹,

Arif²,

Khan³

2015

Herbicides, Physiology of Action, and Safety

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“…Although rare, it is not unlikely that resistance could evolve in a predominantly asexually reproducing species such as yellow nutsedge. A yellow nutsedge biotype with resistance to halosulfuron has been documented in Arkansas rice production (Tehranchian et al 2014). Studies have revealed that the resistant biotype had .…”

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confidence: 99%

“…Studies have revealed that the resistant biotype had . 2,714-fold resistance to halosulfuron compared to a susceptible standard and also showed cross resistance to other acetolactate synthase (ALS) -inhibiting herbicides including imazamox, imazethapyr, bispyribac-sodium, pyrithiobac, bensulfuron, and penoxsulam (Tehranchian et al 2014). Subsequent molecular characterization revealed the presence of a target-site mutation resulting in an amino acid substitution from Trp574 to Leu (Tehranchian et al 2014).…”

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confidence: 99%

Acetolactate Synthase–Inhibitor–Resistant Yellow Nutsedge (Cyperus esculentus): I—Phenotypic Differences

et al. 2015

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Acetolactate synthase (ALS) -inhibitor resistance has been recently documented in a yellow nutsedge biotype in Arkansas rice production, with a target-site mutation resulting in an amino acid substitution from Trp574 to Leu. Preliminary observations have indicated that the resistant biotype showed distinct phenotypic characteristics. Two greenhouse experiments were conducted on the resistant biotype in comparison with three susceptible standards (1) to understand differential growth habit and spatial distribution, and (2) to characterize shoot emergence pattern and seedling vigor. The resistant biotype exhibited a drastically different growth habit with secondary and tertiary basal bulbs emerging away from the parent shoot, resulting in a wider spatial distribution and ground coverage compared to the very compact growth habit of susceptible biotypes. Unlike the susceptible biotypes, the rhizomes developing into tubers were not often connected to the primary basal bulb, but were originating randomly from daughter shoots. The resistant biotype produced an extensive subterranean network of rhizomes and basal bulbs, with wider root spread and distribution compared to the susceptible biotypes. The growth habit of the resistant biotype appeared to be intermediate between yellow and purple nutsedges. Further, the resistant biotype showed a considerably delayed emergence pattern with relatively high levels of tuber dormancy. Although the resistant plants exhibited low early-growth seedling vigor and biomass production compared to the susceptible biotypes (perhaps because of smaller tubers), final aboveground biomass production was greater than that of susceptible biotypes. The overall growth habit and phenotype of the resistant biotype may provide a competitive advantage over adjacent species through the ability to occupy niches and gain improved access to critical resources. The distinct growth pattern may also mean that tillage should not be relied upon for control because it can assist further spread by disconnecting and displacing the chains of rhizomes. Nomenclature: Yellow nutsedge, Cyperus esculentus L.; purple nutsedge, Cyperus rotundus L.; rice, Oryza sativa L.

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“…Chemical control, particularly with acetolactate synthase (ALS)-inhibiting herbicides, in comparison to cultural and mechanical control, has been the most effective means for managing this weed species. Recently, a nutsedge biotype identified as yellow nutsedge by a USDA plant taxonomist (Dr. Charles Bryson) exhibited resistance to several ALS-inhibiting herbicides commonly used in Arkansas rice production (Tehranchian et al 2014b).…”

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confidence: 99%

Acetolactate Synthase–Inhibitor Resistance in Yellow Nutsedge (Cyperus esculentus): II—Physiognomy and Photoperiodic Response

et al. 2015

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Yellow nutsedge is one of the most problematic weedy sedges in rice-soybean systems of the Mississippi Delta region. An acetolactate synthase (ALS)-inhibiting, herbicide-resistant (Res) yellow nutsedge biotype was recently documented in eastern Arkansas, which showed intermediary growth habit between yellow nutsedge and purple nutsedge and also exhibited differential photoperiodic sensitivity to flowering. The objectives of this study were to: (a) determine variation in reproductive characteristics of the Res biotype and three susceptible (Sus) yellow nutsedge biotypes, (b) understand the influence of photoperiod on growth and reproduction, (c) understand the potential role of seeds in population establishment, and (d) elucidate the phylogenetic relationships between the Res yellow nutsedge biotype and purple nutsedge. Tuber production per plant and tuber weight of the Res biotype were less than that of the Sus biotypes. Differences in quantitative traits, such as shoot and tuber production existed between the Res and Sus biotypes for photoperiods ranging from 12 to 16 h. Generally, photoperiods greater than 12 h increased shoot development in all yellow nutsedge biotypes, with differential responses among the biotypes. Number of tubers reached the maximum for the Res biotype at a 14-h photoperiod. Over a 90-d period, inflorescence formation was only observed in the Res biotype with maximum flowering and seed production in the 14-h photoperiod. Subsequent tests revealed up to 18% seed germination, suggesting that seed could also play a role (in addition to tubers) in the persistence and spread of the Res yellow nutsedge. Phylogenetic analysis based on ribosomal DNA internal transcribed spacer (ITS) regions and mitochondrial nad4 gene intergenic spacer sequences indicated that the Res biotype was more closely associated with Sus yellow nutsedge biotypes. Nevertheless, 100% similarity for the nad4 gene sequences between the Res yellow nutsedge biotype and a reference purple nutsedge suggests that the Res biotype is likely a result of hybridization between yellow and purple nutsedges, which perhaps explains the intermediary growth characteristics observed in the Res biotype. Nomenclature: Purple nutsedge, Cyperus rotundus L.; yellow nutsedge, Cyperus esculentus L.; rice, Oryza sativa L.; soybean, Glycine max (L.) Merr.

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First report of resistance to acetolactate‐synthase‐inhibiting herbicides in yellow nutsedge (Cyperus esculentus): confirmation and characterization

Abstract: The results suggest a target-site alteration as the mechanism of resistance in yellow nutsedge, which accounts for the cross-resistance to other ALS-inhibiting herbicide families.

Cited by 26 publications

References 24 publications

Modes of Action of Different Classes of Herbicides

Modes of Action of Different Classes of Herbicides

Acetolactate Synthase–Inhibitor–Resistant Yellow Nutsedge (Cyperus esculentus): I—Phenotypic Differences

Acetolactate Synthase–Inhibitor Resistance in Yellow Nutsedge (Cyperus esculentus): II—Physiognomy and Photoperiodic Response

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