BIOSYST-MeBioS
Jan 12, 2016
BIO
SY
ST
-MeB
ioS
BIO
SY
ST
-MeB
ioS
Quality aspects
Importance of food safety
Organic products:no pesticide residues
Possibly better internal quality
Possibly less nitrate
Systems may vary between countries
BIO
SY
ST
-MeB
ioS
BIOSYST-MeBioS www.biw.kuleuven.be
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
BIO
SY
ST
-MeB
ioS
Objective
To explore possible differences in the postharvest quality (texture, flavour during cold storage and shelf-life) of organic and integrated apple
BIO
SY
ST
-MeB
ioS
Experimental design
Full factorial experimental design
FactorsRegions: 3
LEUVEN
BIO
SY
ST
-MeB
ioS
Apple orchards
LOVENJOEL
BIERBEEK
ASSENT
BIO
SY
ST
-MeB
ioS
Experimental design
Full factorial experimental design
FactorsRegions: 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
BIO
SY
ST
-MeB
ioS
Basic parameters
Acoustic stiffness – Aweta DFT
Magness-Taylor firmness – Stable Micro Systems T.A.
Total soluble solids – digital refractometer
BIO
SY
ST
-MeB
ioS
Taste analysis: HPLC
BIO
SY
ST
-MeB
ioS
Aroma analysis: GC/MS
BIO
SY
ST
-MeB
ioS
Statistical analysis
Principal component analysis (Unscrambler)
Mixed model (SAS System 8.0 program) - test for significant differences
BIO
SY
ST
-MeB
ioS
Results and discussion
Basic parameters
Score plot of PCA on basic parameters of apples
Stiffness, firmness
Air stored, shelf-life
Air stored, fresh
At harvest, fresh
CA stored, freshAt harvest, shelf-lifeAt harvest, shelf-lifeCA stored, shelf-life
BIO
SY
ST
-MeB
ioS
Taste profile
Score plot of PCA on taste parameters of apples
at harvest
after storage
mal
ic, q
uinic
aci
d
glucose 0citric acid
fructosesuccrose
BIO
SY
ST
-MeB
ioS
Aroma profile gained from the analysis of the full spectra
Score plot of PCA gained from analysis of full spectra considering the most important 19 volatiles of apples
CA stored, freshAt harvest, fresh
CA stored, shelf-life
Air stored, shelf-life
At harvest, shelf-lifeAt harvest, shelf-life
Air stored, fresh
BIO
SY
ST
-MeB
ioS
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
BIO
SY
ST
-MeB
ioS
Future plans
Histological studies
Air storage,after shelf-life CA storage,after shelf-life
Air storage CA storage
BIO
SY
ST
-MeB
ioS Thanks a lot for your attention!