Different Doses of UV-B Treatments Increase Total Soluble Phenols and Anthocyanin Content of Eregli Black Carrot (Daucus carotaL. spp. sativusvar. atrorubensAlef.) During Storage

Abstract

In the study, the effect of different doses of ultraviolet-B (UV-B) irradiation on the biochemical quality of Eregli Black Carrot (Daucus carota L. spp. sativus var. atrorubens Alef.) investigated, during storage. For this purpose, the carrot roots treated with 0 kJ/m² (control), 1.575 kJ/m² (15d), 3.15 kJ/m² (30d) and 6.30 kJ/m² (60d) doses of UV-B were placed into the 1 kg sized PE bag and then stored in a cold room at 4 ± 1oC temperature and 85-90% relative humidity for 5 months. In the present study, it is found that even if UV-B applications increased the amount of total soluble phenol content of carrots 1.16-1.53 fold during the first month of the experiment, later the amount of TSP decreased. During the storage period, the amount of TSP content changed between 23.72 and 51.11 mg KAE/100 mL. While the lowest amount of anthocyanin has obtained from the control application with 557.76 mg/kg FW, the highest value measured in UV-B 30d with 1636.96 mg/kg FW. As a result of the study, it has determined that UV-B radiation of 3.15 kJ / m² dose could be used to increase the anthocyanin content of carrots.