Effects of elevated CO2 on energy metabolism and γ-aminobutyric acid shunt pathway in postharvest strawberry fruit
Effects of elevated CO2 on energy metabolism and γ-aminobutyric acid shunt pathway in postharvest strawberry fruit
复制标题
CO2升高对采后草莓果实能量代谢和γ-氨基丁酸分流途径的影响
DOI：
10.1016/j.foodchem.2018.05.106
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发表时间：
2018-11-01
期刊：
影响因子：
8.8
通讯作者：
Luo, Zisheng
中科院分区：
文献类型：
--
作者：
Li, Dong;Li, Li;Luo, Zisheng
以草莓果实为试材，研究了0 ℃贮藏过程中CO2浓度升高对草莓果实能量代谢和γ-氨基丁酸（GABA）旁路途径的影响。10%和20%的CO_2处理能维持果实的品质。10%CO2和20%CO2处理的果实在贮藏12 d时的能荷分别比对照降低了7.58%和23.93%，这与果实中NADH/NAD（+）的下降有关。10%CO_2和20%CO_2处理的果实中GABA含量在第12天分别比对照果实增加了1.2倍和1.6倍。GABA的积累是由于GABA转氨酶活性和基因表达的下降，这可能是导致贮藏后期NADH含量下降的部分原因。结果表明，20%CO_2是草莓果实延长贮藏期至12 d的最佳浓度。
The elevated CO2 was applied to the strawberry fruit during storage at 0 degrees C, in which its effects on energy metabolism and the gamma-aminobutyric acid (GABA) shunt pathway were investigated. 10% and 20% CO2 maintained quality of the fruit. The energy charge of 10% and 20% CO2-treated fruit was decreased by 7.58% and 23.93% on day 12, respectively, compared with the control fruit, which was associated with the decline of NADH/NAD(+). The GABA in 10% and 20% CO2-treated fruit was increased by 1.2-fold and 1.6-fold compared with the control fruit on day 12, respectively. The accumulation of GABA resulted from the decrease of GABA transaminase activity and gene expression, which may partially contribute to the decrease of NADH at later storage. These results indicated that 20% CO2 is an optimal concentration for strawberry fruit to prolong the storage to 12 days.