Journal
FOOD CHEMISTRY
Volume 370, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.131296
Keywords
Volatile organic compounds; GC-MS; Altitude; Wheat species; Multivariate analysis; Partial least-squares regression
Funding
- Consorzio di Ricerca per l'Innovazione Tecnologica, la Qualita e la Sicurezza degli Alimenti (Research Consortium for Technological Innovation, Quality and Safety of Foods) of the Abruzzo region [DM 61316]
- MIUR (Ministry of Instruction, University and Research, Italy)
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The study examined the changes in VOCs profile of wheat grown at different elevations, revealing the influence of altitude on VOCs and identifying specific VOCs that can predict the altitude of samples. Different responses to high altitude stress were observed in different wheat species.
The cultivation of crops at high elevations in response to climate changes leads to modifications in the volatile organic compounds (VOCs) profile. The VOCs profile of common and durum wheat grown in different fields sited at three different elevations over two years was analysed. Partial least square analysis (PLS2) evidenced the effect of altitude on VOCs variance that was hidden among others (cultivation year, species, farm) not correlated with it. PLS1 analysis was further carried out using VOCs as explanatory variables and altitude as dependent variable to find the linear combination of VOCs able to continuously predict the altitude of samples. Selected VOCs, related to biotic, abiotic and oxidative stress conditions, could describe the changes in VOCs profile of wheat induced by altitude increase. Furthermore, common and durum wheat showed different responses to stress at high altitude. These results could be considerably useful for wheat product classification and authentication.
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