Bibliographic Details
| Title: |
Tocopherol and Tocotrienol Content in the Leaves of the Genus Hypericum: Impact of Species and Drying Technique |
| Authors: |
Ieva Miķelsone, Elise Sipeniece, Dalija Segliņa, Paweł Górnaś |
| Source: |
Plants, Vol 14, Iss 7, p 1079 (2025) |
| Publisher Information: |
MDPI AG, 2025. |
| Publication Year: |
2025 |
| Collection: |
LCC:Botany |
| Subject Terms: |
St. John’s wort (Hypericum perforatum L.), photosynthetic, herb, ornamental plant, lipophilic bioactive compound, vitamin E, Botany, QK1-989 |
| More Details: |
α-Tocopherol (α-T) predominates in photosynthetic tissues, while tocotrienols (T3s) are reported very rarely. The genus Hypericum stands out as one of the few exceptions. Given the potential health benefits associated with tocotrienols, sourcing them from natural origins is of interest. The proper selection of plant material and the drying conditions are crucial steps in this process. Therefore, in the present study, we investigated the effects of four different drying techniques (freeze-drying, microwave–vacuum-, infrared oven and air-drying) on the tocochromanol content in leaves of three Hypericum species: H. androsaemum, H. pseudohenryi, and H. hookerianum and one hybrid H. × inodorum. The total tocochromanol content in the freeze-dried leaves harvested in September was 68.1–150.6 mg/100 g dry weight. α-T constituted 66.7–85.9% (w/w), while tocotrienols constituted 13–32% (w/w). H. pseudohenryi was characterized by the lowest tocotrienol content, while H. androsaemum and H. hookerianum had the highest, with δ-T3 and γ-T3, respectively, being predominant. Tocotrienols were more stable during drying than α-T. The greatest decrease in α-T content was observed during air-drying in the presence of sunlight, with a 27% difference compared to the absence of sunlight. The species and harvest time are factors that more strongly affect the tocotrienol content in the Hypericum leaves than the selected drying method. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2223-7747 |
| Relation: |
https://www.mdpi.com/2223-7747/14/7/1079; https://doaj.org/toc/2223-7747 |
| DOI: |
10.3390/plants14071079 |
| Access URL: |
https://doaj.org/article/cd6bc2978226433aa90e74c7911e6f03 |
| Accession Number: |
edsdoj.6bc2978226433aa90e74c7911e6f03 |
| Database: |
Directory of Open Access Journals |
