Different nontarget‐site mechanisms underlie resistance to dicamba and 2,4‐D in an Amaranthus tuberculatus population

Pest Management Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Abstract BACKGROUND Amaranthus tuberculatus (Moq.) Sauer (waterhemp) has emerged as one of several weed species that is resistant to synthetic auxin herbicides (SAHs). Among the mechanisms resistance SAHs, nontarget‐site (NTSR) been particular concern owing its complexity. Here, we integrated linkage mapping with transcriptome analysis explore NTSR two dicamba and 2,4‐D, in a multiple‐herbicide‐resistant A. population (CHR). RESULTS Phenotypic evaluations an F 2 indicated polygenic basis for both 2,4‐D CHR. A weak correlation was observed between phenotypic responses treatments. Linkage analyses revealed eight quantitative trait loci (QTL) regions associated mapped seven chromosomes. Together, these QTL explained 24.2 23.1% variation dicamba‐ 2,4‐D‐resistant phenotypes, respectively. Only co‐localized region found traits. CONCLUSION The results this study demonstrated CHR under control genes at multiple loci. genetic associations traits indicate more than mechanism confers population. © 2025 Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf Society Chemical Industry.

Language: Английский

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ARF degradation defines a deeply conserved step in auxin response

Nature Plants, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Language: Английский

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Mechanism of auxin-dependent gene regulation through composite auxin response elements

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: July 19, 2024

Abstract The plant signaling molecule auxin controls growth and development, largely through activating repressing the expression of thousands genes. Auxin-dependent transcriptional changes are mediated by DNA-binding Auxin Response Factors (ARF), whose AuxRE DNA binding sites well-known. identification first showed this to be part a composite element with second motif. Indeed, systematic analysis other motifs enriched in auxin-regulated promoters. Neither basis for enrichment nor mechanisms activity AuxRE’s is known. Here, we systematically mined Arabidopsis promoters elements auxin-responsive We identified many show that their presence reliable predictor response. Through mutating these higher-order modules, demonstrate function promoter activity. Lastly, transcription factors (TFs) bind AuxRE-associated motifs, involvement response, discovered several TFs directly ARF proteins. propose ARF-TF complexes specifically compound promoters, act as source diversification auxin-dependent gene regulation.

Language: Английский

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Focus on proteolysis

The Plant Cell, Journal Year: 2024, Volume and Issue: 36(9), P. 2929 - 2930

Published: June 25, 2024

Proteolysis is an essential cellular function mediating the processing and turnover of proteins to remove damaged or inactive proteins, alter protein (binding enzymatic activities), ensure appropriate stoichiometries in cell.The post-translational control stability also a central feature signaling eukaryotes, i.e. regulating important regulatory crucial for almost all aspects plant biology, including vegetative growth, development, reproduction, stress responses.Proteolysis plays role hormone pathways, defense against pests pathogens, abiotic responses, basic cell functions like cycle, metabolism, organellar biogenesis maintenance, senescence.Compared with animals, genomes encode highly expanded number components related proteolytic pathways ubiquitin-proteasome system, autophagy, programmed death, endosomal trafficking, organelle-associated degradation.Recent advances molecular genetics microscopy high-resolution imaging, vivo labeling, proteomics, mass spectrometry, structural biology have led new insights understanding many areas proteolysis, autophagy chloroplasts other organelles, degradation membrane discovery N-degron involved development environmental responses (immunity stress).Knowledge systems agriculture breeding, given impact on growth yield, as well resistance diseases.This focus issue proteolysis includes two letters editor, one commentary, nine review articles, eight original research articles.The address question whether polyubiquitin pathway operates inside intact chloroplasts.The posed by van Wijk Adam (2024), Reply from Jarvis et al. (2024).Researchers both sides debate make valid points be considered.We eagerly await more definitive data arrive at complete commentary Eckardt

Language: Английский

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Identification and characterization of the auxin-response factor family in moso bamboo reveals that PeARF41 negatively regulates second cell wall formation

Plant Physiology and Biochemistry, Journal Year: 2024, Volume and Issue: 219, P. 109395 - 109395

Published: Dec. 7, 2024

Language: Английский

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