There is an increasing trend to find novel sources of products with high antioxidant capacity and wild fruits are very good examples for these sources. In this study, fruits of Berberis vulgaris and Berberis crataegina, naturally grown in Bayburt province of Turkey, were tested for their physicochemical features, antioxidant capacities, phenolic compound profiles, and antimicrobial activities. The physicochemical analysis of the fruits revealed that the dry matter content, ash content, pH, and a_w values were between 28.47% and 41.61%, 0.65% and 2.13%, 2.44 and 3.25, and 0.996 and 0.97, respectively. The total phenolic content of the fruits was determined by the Folin–Ciocalteu methodology, and for the determination of the antioxidant capacity of the fruits, DPPH, ABTS, and β-carotene bleaching methods were performed and a high level of antioxidant activity was observed. HPLC analysis was applied to identify the phenolic content of the fruits, and gallic acid and chlorogenic acid were found to be the dominant phenolic compounds in Berberis fruits. The water extracts of the Berberis fruits were tested against important foodborne pathogenic bacteria as potential antimicrobials. The extracts inhibited the growth of Bacillus cereus, Salmonella typhimurium, Yersinia enterocolitica, and Staphylococcus aureus at significant rates. This study revealed the potential antioxidant and antimicrobial characteristics of wild-type B. vulgaris and B. crataegina that can be used for different future applications.

Antioxidants have been considered a rational curative strategy to prevent and cure liver diseases involving oxidative stress. An acute obstructive jaundice rat model was established to investigate the in vivo hepatoprotective efficacy of Rosa pimpinellifolia L.

Bu çalışma kapsamında, Bayburt çevresinde yetişen yabani ekşi elma (Malus sylvestris Miller) örneği dört farklı kurutma yöntemi (infrared kurutma, sıcak havada kurutma, oda sıcaklığında kurutma ve dondurarak kurutma) ile kurutulmuş ve kurutulan ürünlerin fenolik madde içeriği ve antioksidan aktiviteleri belirlenmiştir. Kurutma yöntemlerine göre toplam fenolik madde içerikleri açısından en düşük değer oda şartlarında kurutulmuş elma örneğinde (34.92 mg GAE/g KM), en yüksek değer ise sıcak havada kurutulmuş örnekte (41.18 mg GAE/g KM) tespit edilmiştir. Yabani ekşi elma örneklerinin antioksidan aktivite seviyeleri; FRAP yöntemine göre “dondurarak kurutma > sıcak havada kurutma > infrared kurutma > oda sıcaklığında kurutma” şeklinde, CUPRAC yöntemine göre “sıcak havada kurutma > dondurarak kurutma > infrared kurutma> oda sıcaklığında kurutma” şeklinde, β-karoten yöntemine göre ise dondurarak kurutma>sıcak havada kurutma>oda sıcaklığında kurutma>infrared kurutma şeklinde değiştiği belirlenmiştir. CUPRAC metodu ile FRAP metodu arasında yüksek bir korelasyon olduğu saptanmıştır (r=0.939, R2=%88). Elde edilen deneysel verilere göre, antioksidan ve fenolik madde içeriği açısından yabani ekşi elma (Malus sylvestris Miller) için en iyi kurutma yönteminin sıcak havada kurutma olduğu tespit edilmiştir. Renk değerleri açısından en iyi yöntemin dondurarak kurutma olduğu belirlenmiştir.

The northeastern Anatolia region of Turkey is one of the richest plant biodiversity areas in Turkey. This study describes some important tree and fruit characteristics of 20 seed-propagated summer apple genotypes from northeastern Anatolia using morphological and biochemical markers. The genotypes were evaluated morphologically for tree growth habit, ripening date, fruit weight, fruit firmness, fruit shape, fruit color, fruit taste, juiciness and aroma. The biochemical characteristics measured were organic acids, SSC (soluble solid content), titratable acidity, vitamin C, total phenolic content and antioxidant capacity. We found significant differences for most of the morphological and biochemical characteristics. The genotypes exhibited quite diverse harvest dates ranging from 4 July to 16 August. Summer apple genotypes had fruit weight between 101.9 g and 133.5 g. The genotypes had diverse fruit shapes, including round, conic and oblate, and over fruit colours such as pink, red, yellow and green. Genotypes GUM7 and GUM13 stood out for fruit weight, SSC, total phenolic and antioxidant capacity. GUM7 and GUM13 present dissimilarity from the other genotypes. While the first showed a lower average fruit weight, SSC, total phenolic content and antioxidant capacity, the second revealed higher average of fruit weight, total phenolic content, antioxidant capacity and higher SSC. Due to their favorable characteristics, GUM13 can be used for further crosses with genotypes of other groups, which also present favorable characteristics.