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Author Spotlight: Quantification of Aflatoxins and Phytoalexins in Peanut Seeds to Identify Genetic Resistance Against Aspergillus
Published on: April 19, 2024
Dynamic changes of lipids and volatiles in pumpkin seed kernels during oxidation: multi-omics analysis identifies
Lin Ye1, Yanlong Liu2, Xiaocong Jiang3
1Construction Corps Key Laboratory of Special Agricultural Products Further Processing in Southern Xinjiang/College of Food Science and Engineering, Tarim University, Alar, China.
Background:
Accurate evaluation of pumpkin seed oxidation is essential for its effective utilization; however, conventional rancidity indicators have limitations during storage.
Results:
This study employed headspace-solid-phase microextraction-gas chromatography-olfactometry-mass spectrometry and lipidomics to analyze lipids and volatile compounds associated with oxidative rancidity. The results identified 23 differential volatiles, with hexanal (62.61 → 279.49 ng g-1) and pentanol (29.66 → 135.3 ng g-1) showing the most significant changes (variable importance projection > 1). Additionally, 19 lipids related to glycerophospholipid metabolism were significantly down-regulated. Partial least squares regression confirmed a significant correlation between these lipids and peroxide value (P < 0.05), establishing them as markers of rancidity.
Conclusion:
These findings provide new, reliable criteria for the preservation and quality control of pumpkin seeds. © 2025 Society of Chemical Industry.
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