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- MakaleAçık Erişim2022COMPARISON OF POLLEN MORPHOLOGIES EXAMINATION OF SOME Rhododendron SPECIES - PLANT SOURCE OF MAD HONEY
Mayda, Nazli; Özkök, Aslı; Ecem Bayram, Nesrin
Honey is one of the important natural products used for apitherapeutic purposes as well as food consumption. The authenticity of the products to be used for apitherapy is very important. Botanical origin is one of the most critical factors affecting the characterization of bee products, especially honey. Therefore, melissopalynological analysis is essential in honey samples. In this study, the pollen morphologies of four different Rhododendron taxa, the origin of the monofloral "Mad honey" used for apitherapeutic purposes in Turkey, were examined. Five different measurement parameters have been used to investigate the pollen morphology of the plants. As a result, it can be said that pollen morphology has an important place in confirming the botanical origin of “Mad honey”.
- MakaleAçık Erişim2021Scopus SJRQ1Phenolic and free amino acid profiles of bee bread and bee pollen with the same botanical origin - similarities and differences
Bayram, Nesrin Ecem; Gercek, Yusuf Can; Çelik, Saffet; Mayda, Nazli; Kostic, Aleksandar Z.; Dramicanin, Aleksandra M.; Özkök, Asli
In this study, the chemical profile of bee pollen (BP) and bee bread (BB) samples collected from the same beehive were analyzed by LC-MS/MS (liquid chromatography technique coupled with tandem mass spectrometry), providing the identification of 23 phenolic compounds and 42 free amino acids (FAAs). Rutin was the phenolic compound with the highest rate of occurrence in both BP and BB samples. However, concentrations of protocatechuic acid, 2,5-dihydroxybenzoic acid and kaempferol compounds were significantly higher in BB samples than in BP samples from the same hive probably as result of microbial activity and glycosides degradation. The obtained data revealed that the phenolic profiles of the samples differ not only by the type of a product but also by region. Among FAAs proline was the predominant compound in all the analyzed BP and BB samples followed by L-asparagine (BP samples) and L-aspartic acid (BP and BB samples). A high content of proline can be used as a parameter of sample freshness. Also, Principal Component Analysis (PCA) and Cluster analysis proved the possibility of using phlorizin as a chemotaxonomic marker for Rosaceae (Malus or Prunus genus) pollen presence in BP1 sample. In addition, amino acid profile had higher impact on BP and BB sample differentiation due to lower FAAs content in BB samples probably caused by microbial activity. To the best of our knowledge, this study is the first to compare the individual phenolic compounds and free amino acids of bee pollen and bee bread samples with the same botanical origin (predominantly originated from plants belonging to the following families: Asteraceae, Fabaceae, Plantaginaceae and Rosaceae). (C) 2021 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.
AtıfScopus103WoS92OpenAlex114
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