Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea Plantation
<i>Camellia sinensis</i> tea has received considerable attention due to its beneficial effects on health, particularly due to its antioxidant properties that are affected by several factors, which have a high influence on the final quality of black tea. The objective of this study was to...
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2025-01-01
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| author | Lisete Sousa Paiva Ana Paula Dias Madalena Hintze Motta José António Bettencourt Baptista |
| author_facet | Lisete Sousa Paiva Ana Paula Dias Madalena Hintze Motta José António Bettencourt Baptista |
| author_sort | Lisete Sousa Paiva |
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| description | <i>Camellia sinensis</i> tea has received considerable attention due to its beneficial effects on health, particularly due to its antioxidant properties that are affected by several factors, which have a high influence on the final quality of black tea. The objective of this study was to investigate the biological properties of Azorean <i>C. sinensis</i> black tea from five different zones of tea plantation in order to select specific areas to cultivate tea rich in targeted compounds beneficial to human health. The free radical scavenging activity (FRSA), ferric reducing antioxidant power (FRAP), ferrous ion chelating (FIC) activities, total phenolic content (TPC), total flavonoid content (TFC), and tannins were determined by colorimetric methods, and catechin and theaflavin contents were analyzed by high-pressure liquid chromatography. The results indicated that samples from Zone E (341 m above the sea level) presented higher values of FRSA (EC<sub>50</sub> = 7.22 µg/mL), FRAP (EC<sub>50</sub> = 9.06 µg/mL), and FIC activities (79.83%) and higher values of total phenolics (264.76 mg GAE/g DE) and almost all catechins. For TFC, the values were very similar between zones, and for theaflavins content, Zone A showed the best levels, followed by Zone E. In general, these results clearly highlight that altitude plays a significant role in enhancing certain compounds of tea, thereby influencing its quality. |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-6b1b3d38268947a99ea964781c90aad62025-01-10T13:19:46ZengMDPI AGPlants2223-77472025-01-0114110310.3390/plants14010103Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea PlantationLisete Sousa Paiva0Ana Paula Dias1Madalena Hintze Motta2José António Bettencourt Baptista3Department of Science of Physics, Chemistry and Engineering of Faculty of Science and Technology and Institute of Agricultural and Environmental Research and Technology (IITAA), University of Azores, 9500-321 Ponta Delgada, PortugalGorreana Tea Plantation, Gorreana, 9625-304 Maia, PortugalGorreana Tea Plantation, Gorreana, 9625-304 Maia, PortugalDepartment of Science of Physics, Chemistry and Engineering of Faculty of Science and Technology and Institute of Agricultural and Environmental Research and Technology (IITAA), University of Azores, 9500-321 Ponta Delgada, Portugal<i>Camellia sinensis</i> tea has received considerable attention due to its beneficial effects on health, particularly due to its antioxidant properties that are affected by several factors, which have a high influence on the final quality of black tea. The objective of this study was to investigate the biological properties of Azorean <i>C. sinensis</i> black tea from five different zones of tea plantation in order to select specific areas to cultivate tea rich in targeted compounds beneficial to human health. The free radical scavenging activity (FRSA), ferric reducing antioxidant power (FRAP), ferrous ion chelating (FIC) activities, total phenolic content (TPC), total flavonoid content (TFC), and tannins were determined by colorimetric methods, and catechin and theaflavin contents were analyzed by high-pressure liquid chromatography. The results indicated that samples from Zone E (341 m above the sea level) presented higher values of FRSA (EC<sub>50</sub> = 7.22 µg/mL), FRAP (EC<sub>50</sub> = 9.06 µg/mL), and FIC activities (79.83%) and higher values of total phenolics (264.76 mg GAE/g DE) and almost all catechins. For TFC, the values were very similar between zones, and for theaflavins content, Zone A showed the best levels, followed by Zone E. In general, these results clearly highlight that altitude plays a significant role in enhancing certain compounds of tea, thereby influencing its quality.https://www.mdpi.com/2223-7747/14/1/103antioxidant propertiescatechins and theaflavins contentphenolicsflavonoids and tannins contenttea health benefits |
| spellingShingle | Lisete Sousa Paiva Ana Paula Dias Madalena Hintze Motta José António Bettencourt Baptista Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea Plantation Plants antioxidant properties catechins and theaflavins content phenolics flavonoids and tannins content tea health benefits |
| title | Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea Plantation |
| title_full | Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea Plantation |
| title_fullStr | Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea Plantation |
| title_full_unstemmed | Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea Plantation |
| title_short | Phytochemicals and Biological Properties of Azorean <i>Camellia sinensis</i> Black Tea Samples from Different Zones of Tea Plantation |
| title_sort | phytochemicals and biological properties of azorean i camellia sinensis i black tea samples from different zones of tea plantation |
| topic | antioxidant properties catechins and theaflavins content phenolics flavonoids and tannins content tea health benefits |
| url | https://www.mdpi.com/2223-7747/14/1/103 |
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