Claim · model-written summary
Irradiation left PAL and POD activities unaffected.
- Taxon
- lotus root
Nelumbo nuciferae0 - Treatment
- Irradiatione1
- Gene
- phenylalanine ammonia-lyase (PAL) and peroxidase (POD)e1
- Outcome
- activitiese1
- Direction
- remained unaffectede1
Not reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fresh-cut lotus root is highly susceptible to quality deterioration”
e1“Irradiation induced a dose-dependent inhibition of polyphenol oxidase (PPO) activity, with the 3 kGy treatment exerting the strongest suppressive effect; however, the activities of phenylalanine ammonia-lyase (PAL) and peroxidase (POD) remained unaffected”
Title
Dongjie Liu; Shihui Zhang; Feng Wang; et al. Food Innovation and Advances 2026. doi:10.48130/fia-0026-0008
Other claims from this paper (15)
- Intervention effect Irradiation effectively controlled total bacterial numbers in fresh-cut lotus root within 5 log10 CFU/g during storage.
- Intervention effect Irradiation significantly inhibited browning of fresh-cut lotus root.
- Intervention effect Irradiation at 1 kGy reduced the browning index of fresh-cut lotus root by 19.6% relative to the control.
- Intervention effect Irradiation at 2 kGy reduced the browning index of fresh-cut lotus root by 25.3% relative to the control.
- Intervention effect Irradiation at 3 kGy reduced the browning index of fresh-cut lotus root by 28.6% relative to the control.
- Mechanism The browning inhibition by irradiation is attributed to delayed degradation of total phenolics and suppressed accumulation of soluble quinones.
- Intervention effect Irradiation induced a dose-dependent inhibition of PPO activity in fresh-cut lotus root.
- Intervention effect The 3 kGy treatment exerted the strongest suppressive effect on PPO.
- Intervention effect Three kGy irradiation induced rearrangements in the secondary structure of PPO.
- Intervention effect Three kGy irradiation disrupted the tertiary structure of PPO.
- Intervention effect Three kGy irradiation reduced the alpha-helix content of PPO from 35.4% to 18.4%.
- Intervention effect Three kGy irradiation shifted the fluorescence spectra of PPO by a 12 nm redshift.
- Intervention effect Three kGy irradiation significantly quenched PPO fluorescence.
- Mechanism Disruption of PPO tertiary structure exposes its hydrophobic core and leads to functional inactivation of the enzyme.
- Mechanism 60Co-gamma irradiation maintains fresh-cut lotus root quality mainly through direct microbial inactivation and suppression of the PPO-mediated browning pathway.