PHYSICAL AND CHEMICAL CHARACTERISTICS OF THREE STRAWBERRY CULTIVARS DURING COLD STORAGE
The physical and chemical characteristics of Shuxiang, Tianxiang and Yanxiang strawberry (Fragaria × ananassa Duch.) fruit stored at 0°C for 16 days were investigated. Our research found that the concentration of fructose and glucose did not change significantly, while the sucrose content decreased rapidly during cold storage. The major organic acid in strawberries is citric acid, and with a little L-malic acid and D-malic acid. Shuxiang strawberries showed the lowest concentration of L-malic acid (0.39-0.48 mg g-1 FW) and D-malic acid (0.17-0.34 mg g-1 FW) among the three cultivars during the whole postharvest period. The total soluble solid content (SSC), titratable acidity (TA) and ratio SSC/TA of Yanxiang fruit showed to be the highest. The Yanxiang fruit contained the highest amount of reducing sugars (3.57-6.37%), pH (3.68-4.01), total ascorbic acid (64.56-39.08 mg 100 g-1 FW) and total anthocyanins (15.67-44.08 mg 100 g-1 FW), meanwhile it had the lowest free ellagic acid (0.20-0.31 mg 100 g-1 FW). The Tianxiang fruit showed the highest concentrations of free ellagic acid (0.56-0.84 mg 100 g-1 FW), total phenolic compound (212.31-313.70 mg 100 g-1 FW), and 2,5-dimethyl-4-hydroxy-2H-furan-3-one (DMHF) (0.37-0.19 mg 100 g-1 FW) for the first 12 days of storage. This cultivar maintained the highest TA (8.62-7.61 mg g-1 FW), color value (L*, C* and h◦) during the storage period and the best sensory evaluation.
X.Y. Feng, , B.G. Wang, , W.S. Li, , Y. Yang, , L. Shi, and J.J. Yang, (2014). PHYSICAL AND CHEMICAL CHARACTERISTICS OF THREE STRAWBERRY CULTIVARS DURING COLD STORAGE. Acta Hortic. 1049, 939-946
Fragaria × ananassa, cultivars, cold storage, quality