ABSTRACT

The Black Sea region of Turkey is where the Medlar population is most common, and Medlar usually grows naturally in this region. This study was carried out to determine the organic acids, sugars and bioactive compounds of promising Medlar (Mespilus germanica L.) genotypes which were grown in Tonya and Sürmene districts of Trabzon province (Black Sea Region of Turkey) in 2017 and 2018. Total of 15 genotypes were evaluated in the study, including 8 genotypes from Sürmene and 7 genotypes from Tonya. As a result, crude protein was ranged from 1.65 to 2.70%, crude oil from 0.10% to 9.40%, soluble solids contents from 9.80% to 20.20%, titratable aciditty from 0.60% to 1.40%, ascorbic acid from 21.5 mg 100 g⁻¹ to 44.2 mg 100 g⁻¹, malic acid from 590.5 mg 100 g⁻¹ to 1074.5 mg 100 g⁻¹, succinic acid from 127.0 mg 100 g⁻¹ to 419.0 mg 100 g⁻¹, and citric acid from 2.0 mg 100 g⁻¹ to 32.0 mg 100 g⁻¹, fructose from 3255 mg 100 g⁻¹ to 4726 mg 100 g⁻¹, glucose from 2108 mg 100 g⁻¹to 3017 mg 100 g⁻¹, sucrose from 127 mg 100 g⁻¹ to 399 mg 100 g⁻¹, carbohydrate from 47.3% to 73.1%, total phenolics from 41 mg GAE 100 g⁻¹ to 411 mg GAE 100 g⁻¹ and antioxidant activity 13.1 mmol TE 100 g⁻¹ to 77.8 mmol TE 100 g⁻¹. It was found large diversity regarding crude oil, SSC, titratable acidity, citric acid, glucose and antioxidant capacity of fruits among the genotypes. It can be said that the fresh fruits of promising Medlar genotypes are particularly promising for the use of nutraceuticals. In particular, Ton-20 and Ton-21 genotypes were remarkable due to their high-quality characteristics and total phenolic content.

摘要

土耳其的黑海地区是枸杞子种群最常见的地区，而枸杞子通常在该地区自然生长。这项研究旨在确定在2017年和2018年在特拉布宗省（土耳其黑海地区）Tonya和Sürmene地区生长的有前景的Medlar（Mespilus germanica L.）基因型的有机酸，糖和生物活性化合物。在研究中评估了15个基因型，包括来自Sürmene的8个基因型和来自Tonya的7个基因型。其结果是，粗蛋白质从1.65范围至2.70％，原油从0.10％至9.40％，从9.80％的可溶性固体含量至20.20％，可滴定aciditty从0.60％至1.40％，抗坏血酸从21.5毫克100克^{- 1}至44.2毫克100克^-1，苹果从590.5毫克百克酸^-1至1074.5 mg 100 g ^-1，琥珀酸127.0 mg 100 g ^-1至419.0 mg 100 g ^-1和柠檬酸2.0 mg 100 g ^-1至32.0 mg 100 g ^-1，果糖3255 mg 100 g ^-1至4726 mg 100 g ^-1，葡萄糖2108 mg 100 g ^-1至3017 mg 100 g ^-1，蔗糖从127 mg 100 g ^-1至399 mg 100 g ^-1，碳水化合物从47.3％至73.1％ ，总酚含量从41 mg GAE 100 g ^-1至411 mg GAE 100 g ^-1和抗氧化活性13.1 mmol TE 100 g ^-1至77.8 mmol TE 100 g ^-1。在基因型之间，发现原油，SSC，可滴定酸度，柠檬酸，葡萄糖和水果的抗氧化能力差异很大。可以说，有前景的枸杞基因型的新鲜水果对于使用营养保健品特别有希望。尤其是，Ton-20和Ton-21基因型因其高质量的特性和总酚含量而引人注目。