Seasonal chemical-physical changes of PGI Pachino cherry tomatoes detected by magnetic resonance imaging (MRI)

Alessandra Ciampa, Maria Teresa Dell'Abate, Olimpia Masetti, Massimiliano Valentini, Paolo Sequi

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Magnetic resonance imaging (MRI) has been used to study the variations of internal structure and chemical-physical characteristics of cherry tomatoes (Lycopersicon esculentum cv. Shiren), one the most economically valuable horticultural crops, in different harvesting seasons. In particular, the study focused on PGI (Protected Geographical Indication) Pachino cherry tomatoes, characterised by taste and nutritional value, notably in the winter production, amounting about 500 ton/year. Spin-spin and spin-lattice relaxation times, T2 and T1 respectively, determined on whole fruit, provided useful data highlighting variations among samples according to the season (winter, spring and summer). MRI images evidenced differences among cellular tissues such as pericarp and endocarp, through variations of: (1) T2 and T1 measures and water tumbling and diffusion motion, (2) thicknesses of different morphological zones, (3) qualitative characteristics of the tissue covering placental cavities where seeds are contained. Results of variance analysis (ANOVA) showed that physical parameters, as the transverse and longitudinal relaxation times, T2 and T1, measured in the morphological tissues of vegetables are excellent variables highlighting their differences in different seasons. This innovative non-destructive technique in food science has great potential in fruit quality assessment.

Original languageEnglish
Pages (from-to)1253-1260
Number of pages8
JournalFood Chemistry
Volume122
Issue number4
DOIs
Publication statusPublished - Oct 15 2010

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Keywords

  • Endocarp
  • MRI
  • Pericarp
  • PGI cherry tomatoes
  • Transverse and longitudinal relaxation times
  • Water tumbling and diffusion motion

ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science

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