Changes in volatile organic composition of olive oil extracted from cv. ‘Leccino’ fruit subjected to ethylene treatments at different ripening stages
| Autor: | Franco Famiani, Pietro Tonutti, Stefano Brizzolara, Athanasia-Maria Dourou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Ethylene
030309 nutrition & dietetics Organoleptic extra virgin olive oil postharvest 03 medical and health sciences chemistry.chemical_compound 0404 agricultural biotechnology Plant Growth Regulators Olea Volatile organic compound Olea europaea Olive Oil Aroma chemistry.chemical_classification Volatile Organic Compounds 0303 health sciences Nutrition and Dietetics biology Chemistry Extraction (chemistry) food and beverages exogenous ethylene aroma non-climacteric fruit Ripening 04 agricultural and veterinary sciences Ethylenes biology.organism_classification 040401 food science Horticulture Fruit Odorants Postharvest Composition (visual arts) Agronomy and Crop Science Food Science Biotechnology |
| Popis: | Background Olive, as a non-climacteric fruit, is presumed to be ethylene independent with regard to ripening triggering/coordination. Nevertheless, studies have demonstrated that postharvest ethylene treatments induce changes in composition and properties also of non-climacteric fruits, including aroma profiles, a key quality parameter of extra virgin olive oils. Olive fruit of cv. 'Leccino' harvested at two distinct ripening stages (less advanced ripening, LAR; and more advanced ripening, MAR, with Jaen index of 4.58 and 5.10, respectively) were subjected to ethylene (1000 ppm in air) treatment for 24 h before oil extraction. Results Based on multivariate analysis of volatile organic compound (VOCs), the effect of ethylene treatment appeared to be more pronounced in MAR samples. However, differences in organoleptic analysis were also detected in ethylene-treated LAR olive oils. Ethylene seems to selectively affect linolenic/linoleic acid metabolism, particularly concerning the C5 pathway, and reduce specific defect-associated compounds. Conclusion Exogenous ethylene applied to cv. 'Leccino' olives before processing was effective in inducing specific changes in the VOC profiles of the resulting oil. The effect was different depending on the ripening stage of the harvested olives. The lipoxygenase pathway (including the production of C5 compounds) and fermentative-related compounds appeared to be affected by the treatment. © 2020 Society of Chemical Industry. |
| Databáze: | OpenAIRE |
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