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Related Experiment Videos

Fruit position within the canopy affects kernel lipid composition of hazelnuts.

Antonio Pannico1, Chiara Cirillo1, Matteo Giaccone1

  • 1Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy.

Journal of the Science of Food and Agriculture
|April 5, 2017
PubMed
Summary

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Hazelnut kernel composition varies with tree height. Lower kernels have higher fat but are prone to oxidation, while upper kernels show increased protein and phytosterols, influenced by light distribution.

Area of Science:

  • Agricultural Science
  • Food Science
  • Nutritional Science

Background:

  • Variability in hazelnut kernel composition within tree canopies is not well understood.
  • Understanding this variability is crucial for optimizing hazelnut quality and utilization.

Purpose of the Study:

  • To investigate the variations in hazelnut kernel fresh weight, dry weight, and biochemical composition based on fruit position within the tree canopy.
  • To correlate these compositional changes with environmental factors like light distribution.

Main Methods:

  • Collected hazelnut fruits from different heights within the canopy.
  • Analyzed kernel fresh and dry weight.
  • Determined fat, protein, ash, fatty acid unsaturation, and phytosterol content.
Keywords:
Corylus avellanafatty acidskernel weightlipid oxidationperoxide valuephytosterols

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Main Results:

  • Kernel weight increased with height.
  • Fat content decreased, while protein and ash content increased from bottom to top canopy layers.
  • Lipid unsaturation decreased, and phytosterol content increased with height; lower kernels are nutritionally richer but more susceptible to oxidation.

Conclusions:

  • Fruit position within the hazelnut canopy significantly impacts kernel growth and composition.
  • Light distribution patterns within the canopy are a primary driver of these observed variations.
  • Findings highlight the importance of canopy position for hazelnut quality and potential applications.