Effects of different gas composition storage on physiological changes and quality of Dog-head jujube fruit

doi:10.3969/j.issn.1004-1524.2021.04.16

Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (4): 704-713.DOI: 10.3969/j.issn.1004-1524.2021.04.16

• Food Science • Previous Articles Next Articles

Effects of different gas composition storage on physiological changes and quality of Dog-head jujube fruit

FENG Luoluo¹(), GAO Haiyan², ZHANG Runguang¹, YAN Xinpeng¹, ZHANG Yani¹, HAN Qiqi¹, ZHANG Youlin¹^,^*()

1. College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710119, China
2. Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received:2020-07-07 Online:2021-04-25 Published:2021-04-25
Contact: ZHANG Youlin

Abstract

Abstract:

The effects of different gas composition storage on physiological changes and quality of Dog-head jujube fruit were studied. Shaanxi Yan’an Dog-head jujube was selected as the material to investigate the respiration type, and the storage effect of different gas ratios on the content of sugar, acid, vitamin C (V_C) and the activity of main enzymes. The sensory evaluation was carried out after the storage. Results showed that Dog-head jujube was non-climacteric fruit. The ratio of 10%O₂+90%N₂ gas could slow down the decreasing rate of fruit hardness and titratable acid content, maintain the content of reducing sugar and V_C, inhibit the activities of polygalacturonase (PG), peroxidase (POD) and polyphenol oxidase (PPO), and enhance catalase (CAT) activity. The fresh fruit was stored under the condition of low temperature of -1~0 ℃, relative humidity of 90%~95% and gas ratio of 10% O₂+90% N₂ for 80 d. After storage, the good fruit rate was 88.6%, freshness index was 0.59, and sensory evaluation quality was good.

Key words: Dog-head jujube, respiration type, controlled atmosphere storage, physiological changes, storage quality

CLC Number:

S609

FENG Luoluo, GAO Haiyan, ZHANG Runguang, YAN Xinpeng, ZHANG Yani, HAN Qiqi, ZHANG Youlin. Effects of different gas composition storage on physiological changes and quality of Dog-head jujube fruit[J]. Acta Agriculturae Zhejiangensis, 2021, 33(4): 704-713.

Figures/Tables 16

Table 1 The CA storage experiment design of Dog-head jujube

处理编号 Processing number	气体组成Gas composition
处理编号 Processing number	CO₂/%	O₂/%	N₂/%
1	0	21	79
2	0	10	90
3	1	10	89
4	2	10	88

Table 2 The evaluation standards of freshness degree of Dog-head jujube

品名 Description	标准 Standard	鲜度级别 Freshness level
硬绿果Hard green fruit	果硬,红中带绿色,新鲜如初The fruit is hard, red and green, fresh as before	5
硬红果Hard red fruit	果硬,全红色,新鲜The fruit is hard, all red and fresh	4
半软果Semi soft fruit	果实有一半变软,或微失水皱缩Half of the fruit is softened or slightly dehydrated	3
全软果All soft fruit	果实全部变软,或失水严重,但可食用The fruit is all soft, or loses water seriously, but it is edible	2
发霉果Moldy fruit	果实上有小霉点出现,洗后可食用	1
	Small mildew spots appear on the fruit and can be eaten after washing
腐烂果Rotten fruit	果实发霉腐烂,表面斑点严重,不可食用	0
	The fruit is moldy and rotten, with serious spots on the surface, so it is not edible

Table 3 The basic chemical composition and characteristics of Dog-head jujube

营养成分及特征 Nutrient composition and characteristics	测定数值 Measured values
冰点freezing point/℃	-2.30
可滴定酸含量Titratable acid content/%	0.31
还原糖含量Reducing sugar content/(g·kg^-1)	80.40
V_C含量V_C content/(mg·kg^-1)	5 676.20
可溶性固形物含量Soluble solid content/%	22.00
果实硬度Fruit hardness/(kg·cm^-2)	13.80

Fig.1 Respiratory intensity of Dog-head jujube under room temperature

Fig.2 Respiratory intensity of Dog-head jujube under low temperature

Fig.3 Effect of different gas composition storage on fruit hardness of Dog-head jujube Symbols marked without the same lowercase letters meant significant (P<0.05) differences among treatments in the figure. The same as below.

Fig.4 Effect of different gas composition storage on titratable acid content of Dog-head jujube

Fig.5 Effect of different gas composition storage on reducing sugar content of Dog-head jujube

Fig.6 Effect of different gas composition storage on VC content of Dog-head jujube

Fig.7 Effect of different gas composition storage on PG activity of Dog-head jujube

Fig.8 Effect of different gas composition storage on CAT activity of Dog-head jujube

Fig.9 Effect of different gas composition storage on POD activity of Dog-head jujube

Fig.10 Effect of different gas composition storage on PPO activity of Dog-head jujube

Fig.11 Effect of different gas composition storage on the good fruit rate of Dog-head jujube

Fig.12 Effect of different gas composition storage on the freshness index of Dog-head jujube

Fig.13 Appearance of Dog-head jujube treated with different gas composition storage for 80 d

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Effects of different gas composition storage on physiological changes and quality of Dog-head jujube fruit

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