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Quality aspects

?. Quality aspects. Importance of food safety Organic products: no pesticide residues Possibly better internal quality Possibly less nitrate Systems may vary between countries. ?. The postharvest quality of integrated and organically produced apple fruit.

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Quality aspects

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  1. ?

  2. Quality aspects • Importance of food safety • Organic products: • no pesticide residues • Possibly better internal quality • Possibly less nitrate • Systems may vary between countries

  3. ?

  4. The postharvest quality of integrated and organically produced apple fruit E. Róth, A. Z. Berna, K. Beullens, C. Franck, J. Lammertyn, A. Schenk and B. Nicolaï

  5. Objective • To explore possible differences in the postharvest quality (texture, flavour during cold storage and shelf-life) of organic and integrated apple

  6. Experimental design • Full factorial experimental design • Factors • Regions: 3

  7. LEUVEN

  8. Apple orchards ASSENT LOVENJOEL BIERBEEK

  9. Experimental design • Full factorial experimental design • Factors • Regions: 3 • Production system: organic, integrated • Storage: not stored (harvest), air storage, controlled atmosphere storage • Sampling time: 0 day, after 14 days shelf-life • Replicates: 20 apples

  10. Basic parameters • Acoustic stiffness– Aweta DFT • Magness-Taylor firmness – Stable Micro Systems T.A. • Total soluble solids – digital refractometer

  11. Taste analysis: HPLC

  12. Aroma analysis: GC/MS

  13. Statistical analysis • Principal component analysis (Unscrambler) • Mixed model (SAS System 8.0 program)- test for significant differences

  14. Results and discussion • Basic parameters CA stored, shelf-life At harvest, shelf-life CA stored, fresh Air stored, fresh Stiffness, firmness Air stored, shelf-life At harvest, fresh Score plot of PCA on basic parameters of apples

  15. Taste profile after storage 0 glucose citric acid fructose succrose malic, quinic acid at harvest Score plot of PCA on taste parameters of apples

  16. Aroma profile gained from the analysis of the full spectra At harvest, shelf-life Air stored, fresh CA stored, fresh At harvest, fresh Air stored, shelf-life CA stored, shelf-life Score plot of PCA gained from analysis of full spectra considering the most important 19 volatiles of apples

  17. Conclusion • The effect of storage condition is much larger than that of the production systems on the quality of apples. • No considerable regional effect has been experienced, maybe due to the small differences between orchards with respect to climate and soil parameters. • Aroma profiles of apples stored in air and under controlled atmosphere converge during shelf-life conditions

  18. Future plans Air storage CA storage CA storage,after shelf-life Air storage,after shelf-life • Histological studies

  19. Thanks a lot for your attention!

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