Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive Trees
In recent years, occurrences of heat waves and drought have become increasingly frequent, highlighting the undeniable impact of climate change. The rise in temperatures and decline in rainfall have had severe repercussions on olive trees’ behavior and olive oil production. This study aims to evaluat...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/13/12/2884 |
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| author | Leticia Bortoluzzi Susana Casal Rebeca Cruz António M. Peres Paula Baptista Nuno Rodrigues |
| author_facet | Leticia Bortoluzzi Susana Casal Rebeca Cruz António M. Peres Paula Baptista Nuno Rodrigues |
| author_sort | Leticia Bortoluzzi |
| collection | DOAJ |
| description | In recent years, occurrences of heat waves and drought have become increasingly frequent, highlighting the undeniable impact of climate change. The rise in temperatures and decline in rainfall have had severe repercussions on olive trees’ behavior and olive oil production. This study aims to evaluate the effects of two-year climate variations on olive oils from centenarian olive trees situated in the Côa Valley region of Northern Portugal. A selection of 25 centenarian plants was made, and the climate influence on fatty acid content, tocopherols, individual phenols, oxidative stability, and antioxidant activity was assessed over two consecutive years. During the second year of the study, a significant variation (<i>p</i>-value < 0.05) in the proportion of palmitic acid was observed, which increased from 12.9% to 13.6%. Conversely, stearic and arachidic acids exhibited a decrease from 2.7% to 2.3% and from 0.37% to 0.35%, respectively. Analysis of the oils revealed a noteworthy difference (<i>p</i>-value < 0.05) in the concentration of β-tocopherol. The concentration of oils derived from hydroxytyrosol and tyrosol significantly decreases (<i>p</i>-value < 0.005) during the second year. Additionally, significant differences (<i>p</i>-value < 0.005) were observed in the total phenol content and the percentage of ABTS inhibition, both of which decreased in the second year. These findings reinforce the notion that climatic conditions play a key role in shaping the composition of olive oils. |
| first_indexed | 2024-03-08T21:04:33Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-08T21:04:33Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-83b165c3be7e4dc7939e62c94877198c2023-12-22T13:46:10ZengMDPI AGAgronomy2073-43952023-11-011312288410.3390/agronomy13122884Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive TreesLeticia Bortoluzzi0Susana Casal1Rebeca Cruz2António M. Peres3Paula Baptista4Nuno Rodrigues5Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, PortugalLAQV/REQUIMTE, Laboratory of Bromatology and Hydrology, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, PortugalLAQV/REQUIMTE, Laboratory of Bromatology and Hydrology, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, PortugalCentro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, PortugalCentro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, PortugalCentro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, PortugalIn recent years, occurrences of heat waves and drought have become increasingly frequent, highlighting the undeniable impact of climate change. The rise in temperatures and decline in rainfall have had severe repercussions on olive trees’ behavior and olive oil production. This study aims to evaluate the effects of two-year climate variations on olive oils from centenarian olive trees situated in the Côa Valley region of Northern Portugal. A selection of 25 centenarian plants was made, and the climate influence on fatty acid content, tocopherols, individual phenols, oxidative stability, and antioxidant activity was assessed over two consecutive years. During the second year of the study, a significant variation (<i>p</i>-value < 0.05) in the proportion of palmitic acid was observed, which increased from 12.9% to 13.6%. Conversely, stearic and arachidic acids exhibited a decrease from 2.7% to 2.3% and from 0.37% to 0.35%, respectively. Analysis of the oils revealed a noteworthy difference (<i>p</i>-value < 0.05) in the concentration of β-tocopherol. The concentration of oils derived from hydroxytyrosol and tyrosol significantly decreases (<i>p</i>-value < 0.005) during the second year. Additionally, significant differences (<i>p</i>-value < 0.005) were observed in the total phenol content and the percentage of ABTS inhibition, both of which decreased in the second year. These findings reinforce the notion that climatic conditions play a key role in shaping the composition of olive oils.https://www.mdpi.com/2073-4395/13/12/2884climate changeolive oilcompositioninterannual variations |
| spellingShingle | Leticia Bortoluzzi Susana Casal Rebeca Cruz António M. Peres Paula Baptista Nuno Rodrigues Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive Trees Agronomy climate change olive oil composition interannual variations |
| title | Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive Trees |
| title_full | Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive Trees |
| title_fullStr | Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive Trees |
| title_full_unstemmed | Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive Trees |
| title_short | Influence of Interannual Climate Conditions on the Composition of Olive Oil from Centenarian Olive Trees |
| title_sort | influence of interannual climate conditions on the composition of olive oil from centenarian olive trees |
| topic | climate change olive oil composition interannual variations |
| url | https://www.mdpi.com/2073-4395/13/12/2884 |
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