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 m-² (control), 1.575 kJ m-² (15m), 3.15 kJ m-² (30m) and 6.30 kJ m-² (60m) doses of UV-B were placed into the 1 kg sized PE bag and then stored in a cold room at 4 ± 1 o C 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 (TSP) 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 CAE 100 mL-1. While the lowest amount of anthocyanin has obtained from the control application with 557.76 mg kg-1 FW, the highest value measured in UV-B 30m with 1636.96 mg kg-1 FW. As a result of the study, it has determined that UV-B radiation of 3.15 kJ m-² dose could be used to increase the anthocyanin content of black carrots.