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Food Chem X
2023 Jun 30;18:100727. doi: 10.1016/j.fochx.2023.100727.
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Insight into the relationship between metabolite dynamic changes and microorganisms of sea urchin (S. intermedius) gonads during storage.
Cai WQ
,
Jiang CY
,
Shang S
,
Wang SC
,
Zhu KY
,
Dong XP
,
Zhou DY
,
Jiang PF
.
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Sea urchin gonads have high nutritional value and degenerate rapidly during storage. Previous assessment of the freshness of sea urchin gonads was based on experience without valid biochemical indicators. Thus, the current study is to find biochemical indicators representing the freshness of sea urchin gonads. Results showed that the dominant genera of sea urchin gonads were changed from Psychromonas, Ralstonia, and Roseimarinus to Aliivibrio, Psychrilyobacter, and Photobacterium. The differential metabolites of sea urchin gonads were mainly produced through amino acids metabolism. Among them, GC-TOF-MS based differential metabolites had the greatest enrichment in the valine, leucine and isoleucine biosynthesis pathway, while LC-MS based differential metabolites had the greatest enrichment in the alanine, aspartate and glutamate metabolism pathway. The growth of dominant genus (Aliivibrio) had a great influence on the production of differential metabolites. These results will provide valuable information for accurately judging the freshness and shelf life of sea urchin gonads.
Fig. 1. Changes in TVB-N (A), TVC (B), TBARS (C) and sensory evaluation (D) of sea urchin gonads during storage. Different lowercase superscripts (a-d) in the different groups expressed significant differences (P < 0.05).
Fig. 2. Changes in stacked bar chart (A), heat-map (B), and LDA effect size (C) of sea urchin gonads during storage.
Fig. 3. Heatmap of hierarchical clustering analysis (A) and correlation analysis (B), KEGG classification (C) and Pathway analysis (D) of differential metabolites of sea urchin gonads stored on days 0 and 7 obtained from the GC-TOF-MS data.
Fig. 4. Heatmap of hierarchical clustering analysis (A, D), KEGG classification (B, E) and Pathway analysis (C, F) of differential metabolites of sea urchin gonads stored on days 0 and 7 obtained from the LC-MS data (NEG: negative ion mode; POS: positive ion mode).
Fig. 5. Relation correlation analysis between differential metabolites and differential bacteria (genus level).
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