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Integration of 4-OH-7-C3HO-coumarin and controlled atmosphere storage extends the storage period of peeled water chestnuts (Eleocharis dulcis) by delaying the yellowing and quality deterioration

Jialin Duan,Zhiyan Xu,Yunmin Shi,Lanxiang Jiang,Yali Fan,Yulin Li,Ming Ni,Jianjun Hou

The yellowing and quality deterioration are important factors to shorten the storage period of peeled water chestnuts (PWCs). Integration of 4-OH-7-C 3 HO-coumarin and controlled atmosphere (CA) storage (Ne, O 2 ) to extend the storage period of PWCs has not been studied. The objective of the investigation was to reveal the mechanics with that integration of 4-OH-7-C 3 HO-coumarin (1.2 %) and CA storage (81.2 % Ne, 18.8 % O 2 ) extended the storage period of PWCs. PWCs were treated with 4-OH-7-C 3 HO-coumarin (1.2 %), CA storage (81.2 % Ne, 18.8% O 2 ), and integration of 4-OH-7-C 3 HO-coumarin (1.2 %) and CA storage (81.2 % Ne, 18.8 % O 2 ). The yellowing degree, weight loss, yellowing substance contents, enzymatic activities, total soluble solids content, titratable acidity content, ascorbic acid content, and microbe of PWCs were detected. 4-OH-7-C 3 HO-coumarin (1.2 %), CA storage (81.2 % Ne, 18.8 % O 2 ), and integration of 4-OH-7-C 3 HO-coumarin (1.2 %) and CA storage (81.2 % Ne, 18.8 % O 2 ) extended the storage period by 3, 9 and 12 d. Integration of 4-OH-7-C 3 HO-coumarin (1.2 %) and CA storage (81.2 % Ne, 18.8% O 2 ) was the best. On day 12, integration of 4-OH-7-C 3 HO-coumarin (1.2 %) and CA storage (81.2 % Ne, 18.8 % O 2 ) reduced the yellowing degree from 99.5% to 0, the peroxidase activity from 35,603.37 to 28,504.61 U s −1 kg, the eriodictyol content from 3.09 × 10 −4 % to 0, the weight loss from 5.24 % to 0. Integration of 4-OH-7-C 3 HO-coumarin (1.2 %) and CA storage (81.2 % Ne, 18.8 % O 2 ) increased the total soluble solids content from 9.37 % to 13.49%, the titratable acidity content from 5.67 × 10 −3 % to 8.62 × 10 −3 % , and the titratable acidity content from 8 × 10 −5 % to 8.55 × 10 −5 %. Integration of 4-OH-7-C 3 HO-coumarin (1.2 %) and CA storage (81.2 % Ne, 18.8 % O 2 ) can be employed to extend the storage period of PWCs. This study provided a theoretical basis for the practical application of integration of 4-OH-7-C 3 HO-coumarin and CA storage (Ne, O 2 ) to extend the storage period of PWCs.