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Cinnamaldehyde Inhibits Postharvest Gray Mold on Pepper Fruits via Inhibiting Fungal Growth and Triggering Fruit Defense

文献类型： 外文期刊

作者： Yang, Lifei 1 ; Liu, Xiaoli 1 ; Lu, Haiyan 2 ; Zhang, Cunzheng 2 ; Chen, Jian 2 ; Shi, Zhiqi 2 ;

作者机构： 1.Nanjing Agr Univ, Hexian New Countryside Dev Res Inst, Coll Hort, Nanjing 210095, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, Lab Food Qual & Safety, State Key Lab Cultivat Base,Minist Sci & Technol, Nanjing 210014, Peoples R China

关键词： antifungal; Botrytis cinerea; cinnamaldehyde; gray mold; induced defense; pepper fruit

期刊名称：FOODS （ 影响因子：5.2； 五年影响因子：5.5 ）

ISSN：

年卷期： 2023 年 12 卷 18 期

页码：

收录情况： SCI

摘要： Gray mold infected with Botrytis cinerea frequently appears on fruits and vegetables throughout the supply chain after harvest, leading to economic losses. Biological control of postharvest disease with phytochemicals is a promising approach. CA (cinnamaldehyde) is a natural phytochemical with medicinal and antimicrobial activity. This study evaluated the effect of CA in controlling B. cinerea on fresh pepper fruit. CA inhibited B. cinerea growth in vitro significantly in a dose- (0.1-0.8 mM) and time-dependent (6-48 h) manner, with an EC50 (median effective concentration) of 0.5 mM. CA induced the collapse and breakdown of the mycelia. CA induced lipid peroxidation resulting from ROS (reactive oxygen species) accumulation in mycelia, further leading to cell leakage, evidenced by increased conductivity in mycelia. CA induced mycelial glycerol accumulation, resulting in osmotic stress possibly. CA inhibited sporulation and spore germination resulting from ROS accumulation and cell death observed in spores. Spraying CA at 0.5 mM induced a defense response in fresh pepper fruits, such as the accumulation of defense metabolites (flavonoid and total phenols) and an increase in the activity of defense enzymes (PAL, phenylalanine ammonia lyase; PPO, polyphenol oxidase; POD, peroxidase). As CA is a type of environmentally friendly compound, this study provides significant data on the activity of CA in the biocontrol of postharvest gray mold in peppers.

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