Effects of Exogenous γ-aminobutyric Acid Treatment on Nutritional Quality and Antioxidant Activity in Cherry Tomato

doi:10.7668/hbnxb.20196623

Abstract

Abstract:

In order to investigate the effects of different concentrations of γ-aminobutyric acid(GABA)on the nutritional quality and antioxidant activity of cherry tomatoes,cherry tomatoes were used as experimental materials.Foliar spraying of GABA solutions with different concentrations(0,5,10,20,and 40 mmol/L,denoted as CK,G5,G10,G20,and G40,respectively)was initiated at 15 days after the anthesis of the 3rd inflorescence.It aimed to explore the impacts of exogenous GABA application on the nutritional quality,endogenous GABA content,and antioxidant activity-related indicators of cherry tomatoes.The results showed that exogenous GABA treatment could significantly improve the nutritional quality and antioxidant capacity of cherry tomatoes.With the increase in treatment concentration,the contents of soluble sugar,total phenols,and total flavonoids,as well as the sugar-acid ratio,increased continuously.Nutritional quality indicators such as vitamin C content,soluble sugar content,and sugar-acid ratio all reached their maximum values under the G40 treatment.The contents of total phenols and total flavonoids in the G40 treatment were significantly higher than those in other treatments except G20,increasing by 24.26% and 91.75% compared with CK,respectively.The lycopene content of cherry tomatoes under the G40 treatment was the highest,which was significantly 85.96% higher than that of CK.The endogenous GABA content first increased and then decreased with the elevation of treatment concentration,reaching the maximum value under the G20 treatment,which was significantly 101.85% higher than that of the control.However,there was no significant difference in endogenous GABA content between the G20 and G40 treatments.Both DPPH free radical scavenging activity and FRAP antioxidant capacity were synchronously enhanced,and both reached their maximum values under the G40 treatment,which were significantly higher than those of CK.Correlation analysis indicated that the antioxidant capacity of cherry tomatoes was extremely significantly positively correlated with total phenols,total flavonoids,and lycopene.In conclusion,exogenous GABA(G40 treatment)can serve as a green and efficient strategy to enhance the nutritional quality and antioxidant activity of cherry tomato fruits.

Key words: Cherry tomato, Nutritional quality, GABA, Antioxidant capacity

CLC Number:

SHAO Huanyu, LIU Guangmin, WANG Yaqin, WEI Lei, WANG Yimiao, KONG Lingmin, FU Yuxia, HUANG Wei. Effects of Exogenous γ-aminobutyric Acid Treatment on Nutritional Quality and Antioxidant Activity in Cherry Tomato[J]. Acta Agriculturae Boreali-Sinica, 2026, 41(2): 92-100. doi: 10.7668/hbnxb.20196623.

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References 38

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处理 Treatments	可溶性固形物含量/% Soluble solids content	维生素C含量/ (mg/kg) Vitamin C content	可溶性糖含量/ (g/kg) Total soluble sugar content	可滴定酸/ (g/kg) Titratable acid	糖酸比 Sugar-acid ratio
CK	7.53±0.35a	3.36±0.02b	22.68±4.11c	6.78±0.32a	3.35±0.62c
G5	7.87±0.12a	3.68±0.13a	27.22±1.54bc	6.01±0.2bc	4.53±0.35bc
G10	8.00±0.36a	3.04±0.11c	29.95±5.83b	5.67±0.27c	5.33±1.29ab
G20	8.00±0.00a	3.28±0.04b	30.92±2.74b	5.79±0.23bc	5.36±0.62ab
G40	7.77±0.12a	3.72±0.05a	37.67±2.35a	6.21±0.32b	6.07±0.22a

处理 Treatments	可溶性固形物含量/% Soluble solids content	维生素C含量/ (mg/kg) Vitamin C content	可溶性糖含量/ (g/kg) Total soluble sugar content	可滴定酸/ (g/kg) Titratable acid	糖酸比 Sugar-acid ratio
CK	7.53±0.35a	3.36±0.02b	22.68±4.11c	6.78±0.32a	3.35±0.62c
G5	7.87±0.12a	3.68±0.13a	27.22±1.54bc	6.01±0.2bc	4.53±0.35bc
G10	8.00±0.36a	3.04±0.11c	29.95±5.83b	5.67±0.27c	5.33±1.29ab
G20	8.00±0.00a	3.28±0.04b	30.92±2.74b	5.79±0.23bc	5.36±0.62ab
G40	7.77±0.12a	3.72±0.05a	37.67±2.35a	6.21±0.32b	6.07±0.22a

类型 Categories	酚类物质含量 Phenolic compounds contents	处理Treatments
类型 Categories	酚类物质含量 Phenolic compounds contents	CK	G5	G10	G20	G40
酚酸类	咖啡酸	5.30±0.30b	5.38±0.46b	5.62±0.70b	6.75±0.41a	6.22±0.87ab
Phenolic	绿原酸	148.23±17.24c	199.54±14.29b	202.69±9.86b	203.33±9.96b	259.91±11.24a
acids	新绿原酸	4.49±0.70b	9.02±0.96a	9.09±0.27a	8.42±0.79a	8.37±0.37a
	阿魏酸	0.44±0.03a	0.22±0.01d	0.23±0.03cd	0.27±0.02c	0.32±0.02b
	异绿原酸	15.31±1.06b	19.88±1.92a	20.09±1.57a	18.06±0.65a	20.14±0.73a
	对香豆酸	0.42±0.03e	0.53±0.10d	0.68±0.03c	0.92±0.03b	1.07±0.07a
	水杨酸	1.33±0.11b	1.42±0.11a	1.24±0.11b	1.75±0.17a	1.69±0.15a
	香草酸	0.14±0.03b	0.16±0.01b	0.16±0.00b	0.21±0.03a	0.24±0.03a
类黄酮	橙皮素	0.07±0.01c	0.13±0.00b	0.14±0.03b	0.16±0.03b	0.21±0.03a
Flavonoids	山柰酚-3-O-芸香糖苷	7.08±0.93d	19.88±1.64ab	17.87±1.79bc	16.71±0.54c	21.81±1.40a
	柚皮素	1.48±0.22d	3.12±0.42c	5.11±0.22a	3.81±0.40b	4.20±0.53b
	柚皮素-7-O-葡萄糖苷	1.32±0.20c	3.84±0.45b	5.14±0.73a	4.75±0.42a	4.80±0.20a
	槲皮素-3-O-葡萄糖苷	0.06±0.01c	0.29±0.02b	0.34±0.02b	0.34±0.03b	0.42±0.05a
	芦丁	200.12±8.14d	302.29±2.47c	329.68±13.14b	308.11±13.09c	351.06±16.40a
	山柰酚-3-O-葡萄糖苷	0.03±0.00d	0.07±0.01b	0.05±0.01c	0.05±0.00c	0.09±0.01a
	根皮素	0.03±0.00b	0.04±0.01ab	0.05±0.01a	0.04±0.01ab	0.06±0.01a

类型 Categories	酚类物质含量 Phenolic compounds contents	处理Treatments
类型 Categories	酚类物质含量 Phenolic compounds contents	CK	G5	G10	G20	G40
酚酸类	咖啡酸	5.30±0.30b	5.38±0.46b	5.62±0.70b	6.75±0.41a	6.22±0.87ab
Phenolic	绿原酸	148.23±17.24c	199.54±14.29b	202.69±9.86b	203.33±9.96b	259.91±11.24a
acids	新绿原酸	4.49±0.70b	9.02±0.96a	9.09±0.27a	8.42±0.79a	8.37±0.37a
	阿魏酸	0.44±0.03a	0.22±0.01d	0.23±0.03cd	0.27±0.02c	0.32±0.02b
	异绿原酸	15.31±1.06b	19.88±1.92a	20.09±1.57a	18.06±0.65a	20.14±0.73a
	对香豆酸	0.42±0.03e	0.53±0.10d	0.68±0.03c	0.92±0.03b	1.07±0.07a
	水杨酸	1.33±0.11b	1.42±0.11a	1.24±0.11b	1.75±0.17a	1.69±0.15a
	香草酸	0.14±0.03b	0.16±0.01b	0.16±0.00b	0.21±0.03a	0.24±0.03a
类黄酮	橙皮素	0.07±0.01c	0.13±0.00b	0.14±0.03b	0.16±0.03b	0.21±0.03a
Flavonoids	山柰酚-3-O-芸香糖苷	7.08±0.93d	19.88±1.64ab	17.87±1.79bc	16.71±0.54c	21.81±1.40a
	柚皮素	1.48±0.22d	3.12±0.42c	5.11±0.22a	3.81±0.40b	4.20±0.53b
	柚皮素-7-O-葡萄糖苷	1.32±0.20c	3.84±0.45b	5.14±0.73a	4.75±0.42a	4.80±0.20a
	槲皮素-3-O-葡萄糖苷	0.06±0.01c	0.29±0.02b	0.34±0.02b	0.34±0.03b	0.42±0.05a
	芦丁	200.12±8.14d	302.29±2.47c	329.68±13.14b	308.11±13.09c	351.06±16.40a
	山柰酚-3-O-葡萄糖苷	0.03±0.00d	0.07±0.01b	0.05±0.01c	0.05±0.00c	0.09±0.01a
	根皮素	0.03±0.00b	0.04±0.01ab	0.05±0.01a	0.04±0.01ab	0.06±0.01a

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