Carboxymethyl cellulose/Tween 80/Litsea cubeba essential oil nanoemulsion inhibits the growth of Penicillium digitatum and extends the shelf-life of mandarin
文献类型： 外文期刊
作者： Sun, Chang 1 ; Cheng, Xiaomei 2 ; Yuan, Chushan 1 ; Xia, Xu 3 ; Zhou, Yinuo 4 ; Zhu, Xiangrong 1 ;
作者机构： 1.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China
2.Hunan Acad Agr Sci, Hunan Prov Key Lab Fruits & Vegetables Storage & Q, Hunan Prov Int Joint Lab Fruits & Vegetables Proc, Hunan Agr Prod Proc Inst, Changsha 410125, Peoples R China
3.Huaihua Acad Agr Sci, Huaihua 418000, Peoples R China
4.Tianjin Univ Sci & Technol, Coll Food Sci & Engn, Tianjin 300457, Peoples R China
关键词： Litsea cubeba essential oil; Nanoemulsion; Penicillium digitatum; Antifungal activity; 'Shatangju' Mandarin
期刊名称：FOOD CONTROL （ 影响因子：6.0； 五年影响因子：5.8 ）
ISSN： 0956-7135
年卷期： 2024 年 160 卷
页码：
收录情况： SCI
摘要： Penicillium digitatum (P. digitatum) is the primary pathogenic fungus responsible for postharvest citrus green mold, leading to a deterioration in fruit quality and significant economic losses. Litsea cubeba essential oil (LCEO) has gained widespread attention as a natural antifungal substance due to its high safety profile, non-resistance traits, and broad-spectrum antifungal activity. In this study, we prepared Litsea cubeba essential oil nanoemulsion (LCEO-NE) using Tween 80 and carboxymethyl cellulose (CMC) as emulsifiers through ultrasonic emulsification. The investigation delved into their stability, rheology, inhibitory activity against P. digitatum, and efficacy in preserving 'Shatangju' mandarin during storage. The results showed that the droplet size, polydispersity index, and zeta potential were 18.69 nm, 0.116, and -29.72 mV, respectively. LCEO-NE added with CMC and Tween 80 synergistically (LCEO-NE-CMC) have exhibited higher pH stability, ionic strength stability, thermal stability, storage stability, and centrifugal stability compared to LCEO-NE with Tween 80. In vitro fungistatic tests revealed that the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of LCEO-NECMC against P. digitatum were 1 mu L mL-1 and 2 mu L mL-1, respectively. LCEO-NE-CMC effectively inhibited mycelium growth, spore germination, and elongation of germ tubes. Scanning electron microscopy results demonstrated that LCEO-NE-CMC caused wrinkling and twisting of P. digitatum mycelium. Transmission electron microscopy results further revealed severe damage to the cell membrane, cytoplasm, and organelles, hindering mycelial growth. Furthermore, LCEO-NE-CMC treatment of 'Shatangju' mandarin significantly reduced weight loss and decay rate and delayed the decline in hardness and total soluble solids. In summary, LCEO-NE-CMC has been validated as a potent antifungal agent capable of extending the shelf life of 'Shatangju' mandarin.
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