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Data from: Biochemical and molecular dynamics of metabolic flux and detoxification responses in phosphine-resistant Tribolium castaneum

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Mar 26, 2026 version files 36.63 KB

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Abstract

Phosphine (PH₃) is widely used for stored-product pest management, yet increasing resistance in Tribolium castaneum populations poses a significant challenge. This study investigates the metabolic modulation and detoxification response changes observed in phosphine-resistant T. castaneum. Bioassay data analyzed via a Bayesian Hierarchical Model (BHM) revealed substantial heterogeneity in LC₅₀ values, with resistance ratios ranging from 3.73-fold in Shillong to 92.96-fold in Patiala, highlighting pronounced population-specific heterogeneity. There was a significant decline in the activity of glyceraldehyde-3-phosphate dehydrogenase (GAPDH)  from 9.20 ± 0.35 nmol/mg in the susceptible strain to 4.88 ± 0.08 nmol/mg in the highly resistant Patiala populations, whereas there was a two-fold rise in triose phosphate isomerase (TPI) activity in the resistant population. Detoxification enzymes, including carboxylesterase (CE) and glutathione S-transferases (GSTs), exhibited marked elevation, with CE activity rising to 7.82-fold and GST up to 7.65-fold. Although acetylcholinesterase (AChE) enzymatic activity remained unchanged. Quantitative gene expression analysis mirrored enzymatic trends. Gene expression profiling revealed pronounced transcriptional modulation. GAPDH expression was reduced up to 0.03-fold, while TPI transcripts increased by 9.10-fold, indicating re-programming of the lytic pathway. Detoxification-associated genes showed strong induction, with elevation of CE by 94.7-fold and GST Delta family genes by 5.6–26.9-fold and AChE activity by 56-fold, suggesting their role in xenobiotic metabolism. Correlation and principal component analyses confirmed strong concordance between enzymatic activities and transcriptional profiles. Overall, phosphine-resistant T. castaneum populations exhibit coordinated metabolic adjustments and enhanced detoxification responses, reflecting a complex, system-wide adaptive shift.