Involvement of P450s in the metabolic resistance of Digitaria sanguinalis (L.) Scop. To ALS-inhibiting herbicides.

Autor: Guan Y; College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China., Liu L; College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China., Zou Y; College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China., Yang C; College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China., Ji M; College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China. Electronic address: jimingshan@163.com.
Jazyk: angličtina
Zdroj: Pesticide biochemistry and physiology [Pestic Biochem Physiol] 2024 Sep; Vol. 204, pp. 106038. Date of Electronic Publication: 2024 Jul 22.
DOI: 10.1016/j.pestbp.2024.106038
Abstrakt: Weed resistance to a range of herbicides has rapidly evolved, often with different mechanisms of action. The resulting uninhibited growth of weeds poses demonstrable threats to crop production and sustainable agriculture. Digitaria sanguinalis (L.) Scop., a troublesome weed in corn and other agricultural fields, has developed resistance to herbicides that inhibiting ALS (Acetolactate Synthase), such as nicosulfuron. Understanding the weed's resistance patterns and mechanisms is crucial. However, little is known of the non-target site resistance (NTSR) mechanisms of D. sanguinalis owing to a lack of relevant genome sequences and other materials. Therefore, in this study, a population of D.sanguinalis presenting multiple resistance was tested and found that its high level of resistance to ALS-inhibiting herbicides was not associated with target-related alterations.Administration of P450 inhibitors reversed the resistance to ALS-inhibiting herbicides. Following the application of ALS-inhibiting herbicides, the activities of NADPH-P450 reductase and p-nitroanisole O-demethylase (PNOD) were notably greater in the resistant population of D. sanguinalis than those in the susceptible population. The results suggested P450 enzyme familyplays a major role in the metabolic resistance mechanism, that increased P450 enzyme activity promote cross-resistance in D. sanguinalis to ALS-inhibiting herbicides. RNA-seq analysis showed that five genes from the P450 family (CYP709B2, CYP714C2, CYP71A1, CYP76C2, and CYP81E8) were upregulated in resistant D. sanguinalis. In conclusion, the upregulation of several P450 genes is responsible for establishing resistance to ALS-inhibiting herbicides in D. sanguinalis.
Competing Interests: Declaration of competing interest The authors report no potential conflict of interest.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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