Next Article in Journal
Short Term Cotton Lint Yield Improvement with Cover Crop and No-Tillage Implementation
Next Article in Special Issue
Resistance to Fomesafen, Imazamox and Glyphosate in Euphorbia heterophylla from Brazil
Previous Article in Journal / Special Issue
Resistance Evolution to EPSPS Inhibiting Herbicides in False Barley (Hordeum murinum) Harvested in Southern Spain
Article

Amaranthus palmeri a New Invasive Weed in Spain with Herbicide Resistant Biotypes

1
Departament d’Hortofructicultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, 25198 Lleida, Spain
2
Agrarian Research Center ‘Finca La Orden’ Valdesequera, 06187 Badajoz, Spain
3
Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC 27695-7620, USA
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(7), 993; https://doi.org/10.3390/agronomy10070993
Received: 12 June 2020 / Revised: 8 July 2020 / Accepted: 9 July 2020 / Published: 10 July 2020
(This article belongs to the Special Issue Cross and Multiple-Resistant Weeds to Herbicides)
Amaranthus palmeri is the most prominent invasive weed in agricultural land from North America, partly due to its propensity to evolve resistance to multiple herbicide sites of action. In the last two decades, reports of this species have increased throughout the American continent and occasionally in other continents. In 2007, A. palmeri populations were found in three localities in northeastern Spain, and they are still present today. To determine whether these three populations resulted from a common or independent introduction events—and when and from where they could have occurred—research was carried out aiming to characterize the resistance profile and mechanisms to 5-enolpyruvylshikimate-3-phosphate synthase-and acetolactate synthase (ALS)-inhibiting herbicides and to analyze the relationship between these three populations using inter simple sequence repeat DNA fingerprinting. Dose–response trials confirmed that the three populations were susceptible to glyphosate but resistant to nicosulfuron-methyl. Resistance to ALS inhibitors was due to several amino acid substitutions in positions Pro197, Trp574 and Ser653. Moreover, the substitutions Ser653Ile and Pro197Thr are described for the first time in this species. At field-labeled rates, all populations were fully controlled with alternative herbicides with other sites of action. Amaranthus palmeri individuals were clustered in three groups based on unweighted pair group method with arithmetic mean analysis, which corresponded to the three sampled populations, with a 67% of genetic relationship among them. Considering this high genetic variability and the different positions and amino acid substations found between populations, it was hypothesized that different colonization events occurred from the American continent probably prior to the introduction of glyphosate resistant crops. Prevention from new introductions is warranted because new herbicide resistance traits could arrive, complicating the management of this invasive weed species, while managing or eradicating the already established populations. View Full-Text
Keywords: alien plant; ALS inhibitors; dendrogram; glyphosate; inter simple sequence repeat (ISSR) DNA fingerprinting; maize; nicosulfuron-methyl; target-site resistance alien plant; ALS inhibitors; dendrogram; glyphosate; inter simple sequence repeat (ISSR) DNA fingerprinting; maize; nicosulfuron-methyl; target-site resistance
Show Figures

Figure 1

MDPI and ACS Style

Torra, J.; Royo-Esnal, A.; Romano, Y.; Osuna, M.D.; León, R.G.; Recasens, J. Amaranthus palmeri a New Invasive Weed in Spain with Herbicide Resistant Biotypes. Agronomy 2020, 10, 993. https://doi.org/10.3390/agronomy10070993

AMA Style

Torra J, Royo-Esnal A, Romano Y, Osuna MD, León RG, Recasens J. Amaranthus palmeri a New Invasive Weed in Spain with Herbicide Resistant Biotypes. Agronomy. 2020; 10(7):993. https://doi.org/10.3390/agronomy10070993

Chicago/Turabian Style

Torra, Joel; Royo-Esnal, Aritz; Romano, Yolanda; Osuna, María D.; León, Ramón G.; Recasens, Jordi. 2020. "Amaranthus palmeri a New Invasive Weed in Spain with Herbicide Resistant Biotypes" Agronomy 10, no. 7: 993. https://doi.org/10.3390/agronomy10070993

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop