Unravelling the resistance mechanisms to 2,4-D (2,4-dichlorophenoxyacetic acid) in corn poppy (Papaver rhoeas)

Rey Caballero, Jordi; Menéndez, Julio; Giné Bordonaba, Jordi; Salas, Marisa; Alcántara, Ricardo; Torra Farré, Joel

doi:https://doi.org/10.1016/j.pestbp.2016.03.002

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Issue date

2016-10

Author

Rey Caballero, Jordi

Menéndez, Julio

Giné Bordonaba, Jordi

Salas, Marisa

Alcántara, Ricardo

Torra Farré, Joel

Suggested citation

Rey Caballero, Jordi; Menéndez, Julio; Giné Bordonaba, Jordi; Salas, Marisa; Alcántara, Ricardo; Torra Farré, Joel; . (2016) . Unravelling the resistance mechanisms to 2,4-D (2,4-dichlorophenoxyacetic acid) in corn poppy (Papaver rhoeas). Pesticide Biochemistry and Physiology, 2016, vol. 133, p. 67-72. https://doi.org/10.1016/j.pestbp.2016.03.002.

Abstract

In southern Europe, the intensive use of 2,4-D (2,4-dichlorophenoxyacetic acid) and tribenuron-methyl in cereal crop systems has resulted in the evolution of resistant (R) corn poppy (Papaver rhoeas L.) biotypes. Experiments were conducted to elucidate (1) the resistance response to these two herbicides, (2) the cross-resistant pattern to other synthetic auxins and (3) the physiological basis of the auxin resistance in two R (F-R213 and D-R703) populations. R plants were resistant to both 2,4-D and tribenuron-methyl (F-R213) or just to 2,4-D (D-R703) and both R populations were also resistant to dicamba and aminopyralid. Results from absorption and translocation experiment revealed that R plants translocated less [14C]-2,4-D than S plants at all evaluation times. There was between four and eight-fold greater ethylene production in S plants treated with 2,4-D, than in R plants. Overall, these results suggest that reduced 2,4-D translocation is the resistance mechanism in synthetic auxins R corn poppy populations and this likely leads to less ethylene production and greater survival in R plants.

URI

http://hdl.handle.net/10459.1/59795

DOI

https://doi.org/10.1016/j.pestbp.2016.03.002

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Pesticide Biochemistry and Physiology, 2016, vol. 133, p. 67-72

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Except where otherwise noted, this item's license is described as cc-by-nc-nd, (c) Elsevier, 2016