Transgenerational Effect of Drought Stress and Sub-Lethal Doses of Quizalofop-p-ethyl: Decreasing Sensitivity to Herbicide and Biochemical Adjustment in Eragrostis plana

Marcus Vinícius Fipke, Anderson da Rosa Feijó, Natália Silva Garcia, Tamara Heck, Vívian Ebeling Viana, Franck Emmanuel Dayan, Dirceu Agostinetto, Fabiane Pinto Lamego, Gustavo Maia Souza, Edinalvo Rabaioli Camargo and Luis Antonio de Avila
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Marcus Vinícius Fipke: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Anderson da Rosa Feijó: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Natália Silva Garcia: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Tamara Heck: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Vívian Ebeling Viana: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Franck Emmanuel Dayan: Agricultural Biology Department, Colorado State University, Fort Collins, CO 80523, USA
Dirceu Agostinetto: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Fabiane Pinto Lamego: Embrapa Pecuária Sul, BR 153 Km, Bagé 96401, RS, Brazil
Gustavo Maia Souza: Plant Physiology Program, Institute of Biology, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Edinalvo Rabaioli Camargo: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil
Luis Antonio de Avila: Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96160, RS, Brazil

Agriculture, 2022, vol. 12, issue 3, 1-19

Abstract: (1) Background: Eragrostis plana Ness is a invasive C 4 perennial grass in South America and very adaptable to environmental stresses. Our hypothesis is that there is a transgenerational cross-talk between environmental stresses and weed response to herbicides. This study’s objectives were to: (1) evaluate if E. plana primed by drought stress (DRY), a sub-lethal dose of quizalofop-p-ethyl (QPE), or a combination of both drought and herbicide stresses (DRY × QPE), produce a progeny with decreased sensitivity to quizalofop and (2) investigate the potential mechanisms involved in this adaptation; (2) Methods: A population of E. plana was isolatedly submitted to treatments for drought, quizalofop or drought plus quizalofop for two generations. The progenies were analyzed for sensitivity to the herbicide quizalofop and performed biochemical, chromatographic and molecular analyses.; (3) Results: In the G 2 generation, the quizalofop-treated CHK population had reduced stomatal conductance and increased hydrogen peroxide and lipid peroxidation. On the other hand, there was no change in stomatal conductance, hydrogen peroxide level, and lipid peroxidation in the quizalofop-treated DRY population. In addition, this population had increased antioxidant enzyme activity and upregulated CYP72A31 and CYP81A12 expression, which was accompanied by reduced quizalofop-p-ethyl concentrations; (4) Conclusions: E. plana demonstrated a capacity for transgenerational adaptation to abiotic stresses, with the population exposed to drought stress (DRY) becoming less sensitive to quizalofop-p-ethyl treatment.

Keywords: South African lovegrass; acclimatization; CYP450; antioxidant enzymes (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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