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    Fruit quality and biochemical characteristics of new early ripening apricots of Turkey
    (Springer, 2021) Cuhaci, Cigdem; Karaat, Firat Ege; Ugur, Yilmaz; Erdogan, Selim; Asma, Bayram Murat
    In this study, the important fruit quality characteristics of 11 early ripening and promising apricot hybrids and reference cultivars recently developed in Turkey were analyzed. A large variation was observed between the genotypes in terms of fruit size (fruit weight ranged from 34.28 to 72.53 g). The total soluble solids which is one of the significant fruit quality parameters for the table apricots, was found between 10.07 and 18.27% and fruit flesh/kernel rate was between 9.6 and 18.42. Epicatechin, rutin, catechin, chlorogenic acid, epigallocatechin gallate and beta-carotene were found to be the highest bioactive compounds. A large variation was also determined among the genotypes in this regard. ABP-4-23 and ABP-7-12 apricot genotypes were rich with respect to catechin, chlorogenic acid, epicatechin, rutin and beta-carotene. The highest catachin and epicatechin contents were obtained in ABP-4-23 (176.76 and 517.45 mg/kg, respectively). In terms of beta-carotene ABP-2-24 and ABP-1-18 presented the highest values (127.45 and 119.54 mg/kg, respectively). Fruit weight was found highly and positively correlated with kernel weight and total soluble solids (r = 0.65 andr = 0.61, respectively). Fruit weight was also found to be moderately correlated with rutin, quercetin, and beta-carotene, while corrrelations was negative for rutin and beta-carotene. Total acidity was moderately correlated with catechin, epigallocatechin gallate and beta-carotene in positive way.
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    Preharvest Bagging Influences Berry Quality and Phenolic Composition in 'Kureyş' and 'Banaz Kara' Grape Cultivars
    (Springer, 2025) Cuhaci, Cigdem; Zengin, Rukiye; Unal, Mehmet Settar; Erdogan, Selim; Turan, Sebahat; Asma, Bayram Murat
    Bagging is a crucial practice for achieving high-quality grape production and to enhance the commercial value of the fruit. The present study investigated the effects of bagging on the antioxidant capacity and phenolic composition of the 'Kurey & scedil;' and 'Banaz Kara' grape varieties, which are widely cultivated in Turkey. The fruits were bagged using brown paper bags at the pea-sized development stage. Significant differences were observed between the two varieties in terms of fruit weight, colour, antioxidant capacity, and specific phenolic compounds. In the 'Kurey & scedil;' variety, bagging was found to enhance antioxidant activity. DPPH increased from 1988.43 mg TE/kg to 2212.53 mg TE/kg, while CUPRAC increased from 3774.28 mg TE/kg to 4534.57 mg TE/kg. The rutin content was also significantly higher in bagged samples (1675.21 mu g/g) compared to unbagged samples (1093.66 mu g/g). However, the concentrations of other important phenolic compounds, including isoquercitrin (10,493.84 mu g/g), eriodictyol (15,620.65 mu g/g), and procyanidin B2 (5573.98 mu g/g), were considerably higher in unbagged fruits. This suggests that exposure to light plays a pivotal role in stimulating the accumulation of these compounds. In the 'Banaz Kara' variety, light exposure was associated with an increased accumulation of phenolic compounds and enhanced skin pigmentation. These findings highlight variety-specific responses and emphasize the importance of adapting vineyard management strategies according to grape variety.w