Growth rate and genetic structure of Sinapis arvensis susceptible and herbicide resistant populations originating from Greece

Ntoanidou, Symela; Madesis, Panagiotis; Μενεξές, Γεώργιος; Eleftherohorinos, Ilias G.

doi:10.1007/s10681-020-02723-6

Cited by 2 publications

(1 citation statement)

References 42 publications

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“…However, because studies on ALS resistance evolution in johnsongrass do not exist, further research is needed to elucidate the number of genes involved in resistance of this weed tetraploid species, their expression, and their inheritance (Riar et al 2011). In addition, given the inconsistent or negligible impact of this mutation on ALS functionality and plant fitness in other species, for example, rigid ryegrass (Lolium rigidum Gaudin) (Yu et al 2010) and wild mustard (Sinapis arvensis L.) (Ntoanidou et al 2020), further studies are needed to investigate the growth rate and fitness of ALS herbicide-resistant johnsongrass and their final impact on competitive ability.…”

Section: Amplification and Sequencing Of The Als Gene Fragmentmentioning

confidence: 99%

Target-site cross-resistance to ALS inhibitors in johnsongrass originating from Greek cornfields

et al. 2022

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Dicamba is a synthetic auxin herbicide that may be applied over the top of transgenic dicamba-tolerant crops. The increasing prevalence of herbicide-resistant weeds has resulted in increased reliance on dicamba-based herbicides in soybean production systems. Because of the high volatility of dicamba, it is prone to off-target movement, and therefore has been of increased concern regarding dicamba drift onto nearby specialty crops. The present study evaluates twelve mid-Atlantic vegetable crops species for sensitivity to sub-lethal rates of dicamba. Soybean, snap bean, lima bean, tomato, eggplant, bell pepper, cucumber, summer squash, watermelon, pumpkin, sweet basil, lettuce, and kale were grown in the greenhouse and exposed to dicamba at 0, 0.056, 0.11, 0.28, 0.56, 1.12, 2.24 g ae ha−1, which is respectively 0, 1/10,000, 1/5,000, 1/2,000, 1/1,000, 1/500, and 1/250 of the maximum recommended label rate for soybean application (560 g ae ha−1). Vegetable crop injury was evaluated 4 weeks after treatment using visual rating methods and leaf deformation index (LDI) measurements. Overall, snap bean was the most sensitive crop species with dicamba rates as low as 0.11 g ae ha−1 resulting in significantly higher leaf deformation levels compared to the nontreated control. Other Fabaceae and Solanaceae species also demonstrated high sensitivity to sub-lethal rates of dicamba with rates ranging 0.28 to 0.56 g ae ha−1 causing higher leaf deformation compared to the nontreated control. While cucumber, pumpkin, and summer squash were no or moderately sensitive to dicamba, watermelon showed greater sensitivity with unique symptoms at rates as low as 0.056 g ae ha−1 based on visual evaluation. Within the range of tested dicamba rates, sweet basil, lettuce and kale demonstrated tolerance to dicamba with no injury observed at the maximum rate of 2.24 g ae ha−1.

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Section: Amplification and Sequencing Of The Als Gene Fragmentmentioning

confidence: 99%

Target-site cross-resistance to ALS inhibitors in johnsongrass originating from Greek cornfields

et al. 2022

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Comparison of Molecularly Identified Resistant and Susceptible Johnsongrass (Sorghum halepense L.) Populations at ALS Gene, in the Absence and Presence of Field Crops

Papapanagiotou,

Anthimidou,

Eleftherohorinos

et al. 2024

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Background/Objectives: Johnsongrass (Sorghum halepense) is an erect tetraploid, perennial, C4 grass weed species categorized among the world’s most noxious weeds due to its high competitive ability against crops and the increased number of field-evolved herbicide-resistant populations. The aim of the present study was to assess the growth rate and performance of resistant (R) johnsongrass genotypes hosting Trp574Leu target-site cross-resistance at ALS gene, inhibiting various herbicides, compared to susceptible (S) conspecific weeds, in the absence and presence of corn or sunflower antagonism. Methods: The aboveground biomass, tiller, and rhizome production ability of one S and one R johnsongrass population with a Trp574-Leu substitution conferring cross-resistance to ALS-inhibiting herbicides were compared under non-competitive conditions. Furthermore, the competitive ability of these two johnsongrass populations against corn or sunflower was determined in a target-neighborhood design. Results: The S and R johnsongrass populations displayed similar growth rates concerning aboveground biomass and tiller number, whereas the R population displayed a slightly greater growth rate for rhizome production compared to the S population. Both populations grown with corn produced more aboveground biomass than the ones grown with sunflowers. The aboveground biomass of corn was reduced to a greater extent than sunflower by the presence of both johnsongrass populations, while both crops were affected more by the S than by the R population. Conclusions: Although the inheritance and the genetic background of plant materls were not addressed, the findings of this study indicate clearly that the growth rate and competitive ability of the ALS-resistant johnsongrass population are not associated with the resistance mechanism involved.

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Growth rate and genetic structure of Sinapis arvensis susceptible and herbicide resistant populations originating from Greece

Cited by 2 publications

References 42 publications

Target-site cross-resistance to ALS inhibitors in johnsongrass originating from Greek cornfields

Target-site cross-resistance to ALS inhibitors in johnsongrass originating from Greek cornfields

Comparison of Molecularly Identified Resistant and Susceptible Johnsongrass (Sorghum halepense L.) Populations at ALS Gene, in the Absence and Presence of Field Crops

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