Background

Postharvest diseases in fruits and vegetables are one of the major problems in storing them as a fresh agri-product. This study aimed to investigate the antifungal activity of licorice (Glycyrrhiza glabra) aqueous extract against the Penicillium expansum and the Penicillium digitatum in apple and tangerine fruits as well as their postharvest decay during storage time.

Methods

The minimum inhibitory concentration (MIC) of the molds, and the decay inhibition percentage (%DI) with the P.expansum for apple and P.digitatum for tangerine after treatment with licorice aqueous extract were measured. Additionally, the lesion diameter, titratable acidity (TA), total soluble solids (TSS), pH, and organoleptic properties were determined.

Results

The growth of molds was almost inhibited at the concentration of 62.5 mg/mL. The ability of licorice aqueous extract to significantly control and reduce the growth of P. expansum in apple by 60 and 20 % after 7 days and 21 days of storage time was proved, respectively. Furthermore, significant differences in pH and TSS (p < 0.05) were observed in apples. Also, the growth of P. digitatum in the tangerine reduced by 33.3 % after 7 days, while there was no significant difference between the control and treatment groups in pH and TSS for apples, and similarly, there was no significant difference in TA for tangerine samples.

Conclusions

Therefore, the licorice aqueous extract treatment could postpone the blue mold decay in apple fruits and green mold decay in tangerine without any significant effect on fruit quality characteristics. It can be considered as a new eco-friendly control in fruit preservation, while it did not result in any significant adverse effect on the quality.

中文翻译：

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甘草水提物的环保控制，以提高苹果和橘子果实的品质和抗采后腐烂性

背景

水果和蔬菜的采后病害是将它们作为新鲜农产品储存的主要问题之一。本研究旨在研究甘草（Glycyrrhiza glabra）水提物对苹果和橘子果实中的扩张青霉和指状青霉的抗真菌活性以及它们在贮藏期间的采后腐烂。

方法

测定了用甘草水提液处理后对苹果的扩展菌和橘子的指霉对霉菌的最低抑菌浓度（MIC）和腐烂抑制率（%DI） 。此外，还测定了病变直径、可滴定酸度 (TA)、总可溶性固体 (TSS)、pH 和感官特性。

结果

在浓度为 62.5 mg/mL 时霉菌的生长几乎受到抑制。经验证，甘草水提液在贮藏7天和21天后分别显着控制和减少苹果中的P. expansum生长60%和20%。 此外，在苹果中观察到pH 和 TSS 的显着差异 ( p < 0.05)。此外，7 d 后，橘子中P. digitatum的生长减少了 33.3 %，而苹果的 pH 和 TSS 的对照组和处理组之间没有显着差异，同样，橘子的 TA 也没有显着差异样品。

结论

因此，甘草水提液处理可以延缓苹果果实的蓝霉腐烂和橘子的绿霉腐烂，而对果实品质特性没有显着影响。它可以被认为是水果保鲜中的一种新的环保控制，但它不会对质量产生任何显着的不利影响。