The ester derivatives of ferulic acid exhibit strong inhibitory effect on the growth of Alternaria alternata in vitro and in vivo
文献类型： 外文期刊
作者： Kong, Hui 1 ; Fu, Xincheng 1 ; Chang, Xia 1 ; Ding, Zemin 1 ; Yu, Yang 1 ; Xu, Haishan 1 ; Wang, Rongrong 3 ; Shan, Yang 1 ; Ding, Shenghua 1 ;
作者机构： 1.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China
2.Hunan Acad Agr Sci, Hunan Agr Prod Proc Inst, Hunan Prov Key Lab Fruits & Vegetables Storage Pro, Changsha 410125, Peoples R China
3.Hunan Agr Univ, Coll Food Sci & Technol, Changsha 410128, Peoples R China
4.Hunan Acad Agr Sci, Changsha 410125, Peoples R China
关键词： Ferulic acid; Methyl ferulate; Ethyl ferulate; Alternaria alternata; Antifungal; Korla pear
期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：7.0； 五年影响因子：6.9 ）
ISSN： 0925-5214
年卷期： 2023 年 196 卷
页码：
收录情况： SCI
摘要： Alternaria alternata is the principal pathogenic fungus causing postharvest black spot disease of Korla pear, leading to enormous economic losses. This study aimed to explore the antifungal activity of ferulic acid (FA) and its two simple esterified derivatives, methyl ferulate (MF) and ethyl ferulate (EF), against A. alternata in vitro and in vivo, and to reveal the underlying inhibitory mechanisms. The results showed that MF and EF exhibited stronger inhibitory effects than FA on mycelial growth, spore germination and germ tube elongation of A. alternata in vitro, and on reducing the development of black spot disease in Korla pear fruit. Scanning electron microscopy images indicated that the surface morphology of A. alternata hyphae treated with FA, MF, and EF presented irreversible deformation, and transmission electron microscopy observation further demonstrated that MF and EF caused more serious damage to the cell membranes, cytoplasm, and organelles of A. alternata than FA, which impeded the normal growth of A. alternata. Notably, EF was slightly better than MF in inhibiting spore germination and damaging cell ultrastructure of A. alternata. In addition, propidium iodide staining suggested that FA, MF, and EF treatments damaged the plasma membrane integrity of A. alternata spores. At the same conditions, MF and EF treatments induced more leakage of intercellular electrolytes, nucleic acids and proteins of A. alternata than FA, indicating the increase of cell membrane permeability. Taken together, all these results evidenced that MF and EF exerted stronger antifungal activity than FA against A. alternata in vitro and in vivo through membrane damage mechanism, therefore they can be used as promising green substitutes to control postharvest black spot disease on Korla pear fruit.
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