Different harvest times affect market quality of Lycium barbarum L. berries

Abstract

Goji berry is a lesser-known fruit species and its berries have been used in traditional medicine for centuries as remedies totreat eye, liver, and kidney ailments, as well as for the prevention of cancer symptoms due to its high phytochemical content. This studyaimed to investigate changes in the pomological, biochemical, and phytochemical properties of the berries of 4 goji berry genotypesharvested during 4 months (June, July, August, and September) of the same year. The results indicated that the highest berry dimensions(height and width) and soluble solid content were obtained from Genotype 2, harvested in June. The vitamin C, total phenolic, and totalanthocyanin contents and 2,2-diphenyl-1-picrylhydrazyl-hydrate values were between 69.06 and 169.96 mg/100 mL, 219.07 and 558.74mg GAE/L, 2.73 and 107.94 mg/L, and 75.03 and 500.87 µL/mL, respectively, according to the genotypes and harvest months basedon a 3-year (2015–2017) average, indicating great variations in both the genotypes and, in particular, the sampling months. Therefore,consumers must take into consideration the harvest times and berries of the genotypes in order to obtain better contents in the berriesfor human health.