ArticleBMC plant biology2022
The effects of mepiquat chloride (DPC) on the soluble protein content and the activities of protective enzymes in cotton in response to aphid feeding and on the activities of detoxifying enzymes in aphids.
Article in BMC plant biology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 21 citations in OpenAlex.
- Differential morpho-physiological traits and hormone signal transduction pathway of Kentucky bluegrass cultivars in response to drought stress.BMC plant biology · 2026Article
- The identification of gibberellin 2-oxidase gene family in cotton and functional analysis.BMC plant biology · 2026Article
- Biochemical and metabolic responses of cotton variety XLZ54 to Thrips tabaci and screening of resistance characterization indicators.Pest management science · 2026Article
- Lipopeptides from Bacillus velezensis ZLP-101 and their mode of action against bean aphids Acyrthosiphon pisum Harris.BMC microbiology · 2024Article
- A Sweet Potato MYB Transcription FactorGenes · 2024Article
- Current views of drought research: experimental methods, adaptation mechanisms and regulatory strategies.Frontiers in plant science · 2024Review
- Untargeted Metabolite Profiling of Adipose Tissue in Rats Exposed to Mepiquat.Foods (Basel, Switzerland) · 2023Article
- Use of plant growth regulators to reduce 2-methyl-4-chlorophenoxy acetic acid-Na (MPCA-Na) damage in cotton (Gossypium hirsutum).BMC plant biology · 2022Article
- Increasing the activities of protective enzymes is an important strategy to improve resistance in cucumber to powdery mildew disease and melon aphid under different infection/infestation patterns.Frontiers in plant science · 2022Article
- Protective enzyme activity regulation in cotton (Frontiers in plant science · 2022Article
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3 authors at 1 institution in 1 country.
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Abstract
backgroundMepiquat chloride (DPC) enhances the resistance of cotton plants, and it is widely used as a growth regulator. DPC can stimulate photosynthesis, stabilize the structure of cotton leaves, and affect population reproduction and energy substances in Aphis gossypii Glover (cotton aphids), but interactions between DPC and cotton aphids remain unclear. In this study, we analyzed the physiological responses of cotton to DPC, and the toxicity of DPC toward cotton aphids, before and after feeding, to explore the DPC-induced defense mechanism against cotton aphids.
resultsMeasurements of protective enzyme activity in cotton showed that the soluble protein contents, peroxidase (POD) activity, and catalase (CAT) activity in cotton treated with different concentrations of DPC were higher than in the control. Superoxide dismutase (SOD) activity was higher than that of the control when the concentration of DPC was < 0.1 g/L. Under aphid feeding stress, POD activity in cotton treated with a low insect population density was significantly lower than in the controls, but the reverse was true for cotton treated with a high insect population density, and SOD activity was positively correlated with population density. The activities of detoxification enzymes in field and laboratory experiments showed that DPC promoted the specific activity of glutathione S-transferase (GST) in cotton aphids, while the specific activities of carboxylesterase (CarE) and acetylcholinesterase (AchE) were decreased.
conclusionsDPC enhanced the aphid resistance in cotton by increasing the soluble protein content and the activity of protective enzymes. It also had a toxic effect on cotton aphids by increasing GST activity (the main DPC target). DPC increased the soluble protein content and protective enzymes activity in cotton under aphid stress, and thereby enhanced tolerance to cotton aphids. It conclude that DPC interferes with cotton aphids through indirect (DPC induced cotton defense responses) and direct (DPC toxicity to cotton aphids) ways, which plays a positive role in interfering with cotton aphids.
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