INVESTIGATION OF PHENOLIC COMPOSITION OF ORGANICALLY-GROWN STRAWBERRY AND BLUEBERRY

The present study aimed to investigate phenolic compounds of strawberry which is organically-grown in Bursa region and blueberry in Trabzon region. The phenolic acids and flavonoids were detected by RP-HPLC according to their retention times with the help of diode array detector at 280 nm, 320 nm and 360 nm. Investigated compounds were gallic acid, epigallocatechin, catechin, epicatechin, epicatechin gallate, 2 coumaric acid, 3 coumaric acid, 4 coumaric acid, chlorogenic acid, cafeic acid, neochlorogenic acid, trans resveratrol, ferulic acid, quercetin, kaempferol and myricetin. According to results it was determined that bluberry fruit contains high amounts of chlorogenic acid (644.25 mg/kg) and among the phenolic acids in strawberries, 4 coumaric acid is regarded as major phenolic compound (3.76 mg/kg). The highest level of myricetin compounds was measured in blueberry (14.41 mg/kg), on the contrary, myricetin was not identified in strawberry fruits but this fruit is especially rich in catechins (58.34 mg/kg). Bu çalışmada, Bursa yöresinde organik olarak yetişen çilek ve Trabzon yöresinde organik olarak yetiştişen yaban mersini meyvelerinin fenolik bileşenlerinin araştırılması amaçlanmıştır. Fenolik asitler ve flavonoidler, RP-HPLC tarafından tutma sürelerine göre 280 nm, 320 nm ve 360 ​​nm'de DAD detektörü yardımıyla tespit edilmiştir. İncelenen bileşikler, gallik asit, epigallokateşin, kateşin, epikateşin, epikateşin gallat, 2 kumarik asit, 3 kumarik asit, 4 kumarik asit, klorogenik asit, kafeik asit, neoklorogenik asit, trans resveratrol, ferulik asit, kuarsetin, kamferol ve mirisetin’dir. Elde edilen sonuçlara göre, yaban mersini meyvesinin yüksek miktarda klorogenik asit (644.25 mg/kg) içerdiği ve çileklerde fenolik asitler arasında 4 kumarik asidin başlıca fenolik bileşik (3.76 mg/kg) olduğu belirlenmiştir. En yüksek mirisetin miktarı yaban mersini meyvesinde (14.41 mg/kg) olarak ölçülmüş, tam aksine çilek meyvelerinde mirisetin saptanmamıştır, ancak bu meyve özellikle kateşinler bakımından zengindir (58.34 mg / kg).