Chemical Fingerprint of ‘Oblačinska’ Sour Cherry (<i>Prunus</i> <i>cerasus</i> L.) Pollen

oleh: Milica Fotirić Akšić, Uroš Gašić, Dragana Dabić Zagorac, Milica Sredojević, Tomislav Tosti, Maja Natić, Mekjell Meland

Format: Article
Diterbitkan: MDPI AG 2019-08-01

Deskripsi

The aim of this research was to analyze sugars and phenolics of pollen obtained from 15 different &#8216;Oblačinska&#8217; sour cherry clones and to assess the chemical fingerprint of this cultivar. Carbohydrate analysis was done using high-performance anion-exchange chromatography (HPAEC) with pulsed amperometric detection (PAD), while polyphenols were analyzed by ultra-high-performance liquid chromatography&#8722;diode array detector&#8722;tandem mass spectrometry (UHPLC-DAD MS/MS) system. Glucose was the most abundant sugar, followed by fructose and sucrose. Some samples had high level of stress sugars, especially trehalose. Rutin was predominantly polyphenol in a quantity up to 181.12 mg/kg (clone III/9), with chlorogenic acid (up to 59.93 mg/kg in clone III/9) and <i>p</i>-coumaric acid (up to 53.99 mg/kg in clone VIII/1) coming after. According to the principal component analysis (PCA), fructose, maltose, maltotriose, sorbitol, and trehalose were the most important sugars in separating pollen samples. PCA showed splitting off clones VIII/1, IV/8, III/9, and V/P according to the quantity of phenolics and dissimilar profiles. Large differences in chemical composition of studied &#8216;Oblačinska sour cherry&#8217; clone pollen were shown, proving that it is not a cultivar, but population. Finally, due to the highest level of phenolics, clones IV/8, XV/3, and VIII/1 could be singled out as a promising one for producing functional food and/or in medicinal treatments.