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Method for lichee fresh-keeping by epigallocatechin gallate

A technology of epigallocatechin and gallate, applied in the field of fresh-keeping litchi with epigallocatechin gallate, can solve the problems of rapid quality decline, high investment, lag in lychee fresh-keeping technology, etc., and achieves reduction of browning index , the effect of improving economic value

Active Publication Date: 2014-12-10
SOUTH CHINA BOTANICAL GARDEN CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Refrigerated preservation method The investment in buying or renting refrigerated trucks and cold storage energy consumption is relatively high, and litchis are prone to browning after leaving the refrigerated environment
A more advanced storage method is the cold chain controlled atmosphere method, that is, by controlling the temperature, humidity, oxygen and carbon dioxide concentration, the respiration of litchi is inhibited. This storage method can further prolong the storage time of litchi fruit, but it requires more equipment higher
[0004] In recent years, the application of advanced technology and equipment has made some gratifying progress in litchi fresh-keeping technology, but at present, the litchi fresh-keeping technology in my country lags behind, and the fundamental problems of litchi fresh-keeping such as large transport loss and rapid quality decline caused by insufficient equipment have not yet been resolved.
Physical methods such as cold chain and controlled atmosphere storage are ideal and safe storage methods, but due to the relatively high cost of use, they are far from being popularized in my country; moreover, cold chain and controlled atmosphere storage cannot completely control the occurrence of postharvest diseases, especially For some cold-resistant pathogens, such as citrus green mold, litchi downy mildew, papaya and other fruit sour rot diseases

Method used

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  • Method for lichee fresh-keeping by epigallocatechin gallate
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  • Method for lichee fresh-keeping by epigallocatechin gallate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Material: Litchi (Litchi chinenis, Sonn.) collected from Gaozhou area, the variety is "white wax", preservation solution: A solution - containing 0.05% by mass fraction of epigallocatechin gallate and 0.1% by mass fraction of thiophene Bactendazim solution; B solution - a solution containing 0.1% mass fraction of epigallocatechin gallate and 0.1% mass fraction of thiabendazole; C solution - containing 0.2% mass fraction of epigallocatechin gallate ester and 0.1% thiabendazole by mass fraction. The preparation method of each 100ml of A, B and C solutions is as follows: the corresponding amount of epigallocatechin gallate is dissolved in 100ml of 0.1% thiabendazole solution by mass fraction and mixed evenly. Control solution: Thiabendazole solution with a mass fraction of 0.1%.

[0023] 2. Treatment method: eight to nine ripe lychee fruits freshly harvested in sunny days, after sorting, remove diseased and pest fruits and defective fruits, and choose lychee fruits wit...

Embodiment 2

[0033] Material: Litchi (Litchi chinenis, Sonn.) is collected from Gaozhou area, and the variety is "Yuhebao".

[0034]Processing method: Freshly harvested lychee fruits that are eight to nine mature in sunny days are sorted to remove diseased and pest fruits and defective fruits, and obtain lychee fruits that are free from mechanical damage and disease and insect pests. The control and treatment fruits were soaked in fresh water and a freshly prepared 2% EGCG aqueous solution (dissolve 2g of EGCG in 100ml of water and mix well) as a fresh-keeping solution for 0.5min, and take out the EGCG aqueous solution on the surface of the fruit to dry. , packed in 0.01mm thick polyethylene film bags, 20 fruits / bag, 5 bags of fruits per treatment, stored at 25°C for 5 days. Compared with the control, after being treated with 2% EGCG aqueous solution, the browning index of litchi fruit decreased by 17-33%, and the commercial rate increased by 22-40%.

Embodiment 3

[0036] Material: Litchi (Litchi chinenis, Sonn.) is collected from Guangzhou area, and the variety is "Huaizhi".

[0037] Processing method: Freshly harvested lychee fruits that are eight to nine mature in sunny days are sorted to remove diseased and pest fruits and defective fruits, and obtain lychee fruits that are free from mechanical damage and disease and insect pests. The control and treatment fruits were soaked in clean water and freshly prepared 1% EGCG aqueous solution (dissolve 1g of EGCG in 100ml of water and mix well) for 5 minutes, take out the EGCG aqueous solution on the surface of the fruit and dry it, and wash it with 0.03mm Packed in thick polyethylene film bags, 20 fruits / bag, 5 bags of fruits per treatment, stored at 25°C for 6 days.

[0038] Compared with the control, after being treated with 1% EGCG aqueous solution, the browning index of litchi fruit decreased by 25-47%, and the commercial rate increased by 18-39%.

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Abstract

The invention discloses a method for lichee fresh-keeping by epigallocatechin gallate. The method comprises the following steps of a, harvesting lichee fruits which have a maturity degree of 80-90% and no mechanical injuries and insect diseases on a sunny day, and b, immersing the lichee fruits in a fresh-keeping solution for 0.5-5min, drying the fresh-keeping solution on the surfaces of the lichee fruits in air, and carrying out packaging and storage, wherein the fresh-keeping solution comprises 0.05-2wt% of an epigallocatechin gallate solution. The lichee treated by the method does not decay easily in storage and conveying, has the appearance which has no obvious change, and has a reduced browning index and a commodity rate improved by 15-50%. Therefore, the method greatly improves a lichee economic value. The method can be used for fresh-keeping of granulated sugar oranges, banana and papaya.

Description

Technical field: [0001] The invention belongs to the field of fresh-keeping of fruits and vegetables, and in particular relates to a method for fresh-keeping litchi by using epigallocatechin gallate. Background technique: [0002] Litchi (Litchi chinensis Sonn.) is a famous and high-quality fruit produced in southern my country, and it is also one of the most important foreign exchange earning fruits in my country. In recent years, with the continuous expansion of litchi cultivation area in my country, the output has continued to increase. According to statistics in 2011, the planting area of ​​litchi in my country is 555,600 hm 2 , The total output is 1.758 million tons, accounting for about 80% and 75% of the world's litchi planting area and total output. Litchi has a beautiful color and fragrance, and has been loved by people throughout the ages. However, litchi matures in high-temperature summer and is easily rotten and deteriorated. It is one of the most unstorable fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/154
Inventor 屈红霞蒋跃明云泽张正科黄梓辉王慧李月标张丹丹
Owner SOUTH CHINA BOTANICAL GARDEN CHINESE ACADEMY OF SCI
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