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Antifungal activities of a natural trisaccharide ester against sour rot in mandarin fruit

文献类型: 外文期刊

作者: Xu, Liangxiong 1 ; Feng, Linyan 2 ; Sun, Jian 3 ; Mao, Lutian 1 ; Li, Xiaojie 1 ; Jiang, Yueming 2 ; Duan, Xuewu 2 ; Li, Taotao 2 ;

作者机构: 1.Huizhou Univ, Sch Life Sci, Huizhou 510607, Peoples R China

2.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Peoples R China

3.Guangxi Acad Agr Sci, Agrofood Sci & Technol Res Inst, Nanning 530007, Peoples R China

4.Yangjiang Vocat & Tech Coll, Dept Food & Environm Engn, Yangjiang 529566, Peoples R China

关键词: Trisaccharide ester; Citrus reticulate; Sour rot

期刊名称:POSTHARVEST BIOLOGY AND TECHNOLOGY ( 影响因子:6.751; 五年影响因子:7.001 )

ISSN: 0925-5214

年卷期: 2022 年 191 卷

页码:

收录情况: SCI

摘要: Sour rot caused by Geotrichum citri-aurantii is one of the most important diseases leading to postharvest loss of Citrus reticulate. In this study, the antifungal activity of MTE-1, a natural trisaccharide ester from the cultures of Pezicula neosporulosa, against G. citri-aurantii was evaluated. MTE-1 treatment inhibited the mycelium growth of G. citri-aurantii. Paper-disc agar-diffusion experiment showed that the inhibitory effect of MTE-1 against G. citriaurantii was almost comparable to that of the commercial fungicide albesilate. Moreover, application of MTE-1 efficiently reduced the incidence of sour rot of mandarin fruit inoculated with G. citri-aurantii. Ultrastructural observations showed that MTE-1 treatment resulted in thinning of cell wall in spores and reduction of cell content in mycelia of G. citri-aurantii. Furthermore, transcriptome analysis along with RT-qPCR validation was conducted to better understand the role of MTE-1 on G. citri-aurantii. Several important genes related to fungal pathogenicity and virulence, including CRZE PMA1, RMEI, ALDH and Lip, showed decreasing expression levels after MTE-1 treatment, which might be responsible for its antimicrobial activity. Overall, application of MTE-1 is a promising method to control sour rot of harvested citrus fruit.

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