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Geotrichum candidum AGRC-GC1 prevented the decay of pulp from Citri Reticulatae Pericarpium production by inhibiting the growth of spoilage microorganisms

文献类型： 外文期刊

作者： Han, Xue-Ying 1 ; Hu, Jing-Yi 1 ; Luo, Xiao-Chun 1 ; Wang, Zhi-Lin 2 ; Li, Jia-Zhou 3 ; Li, Shuang 1 ; Deng, Jun-Jin 2 ;

作者机构： 1.South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Biol & Biol Engn, Guangzhou 510006, Guangdong, Peoples R China

2.Guangdong Acad Agr Sci, Agrobiol Gene Res Ctr, State Key Lab Swine & Poultry Breeding Ind, 20 Jinying Rd, Guangzhou 510640, Guangdong, Peoples R China

3.Guangdong Acad Agr Sci, Guangdong Engn Technol Res Ctr Anim Meat Qual & Sa, Minist Agr & Rural Affairs,Inst Anim Sci, Guangdong Prov Key Lab Anim Breeding & Nutr, Guangzhou 510640, Guangdong, Peoples R China

4.Guangdong Lab Lingnan Modern Agr Heyuan Sub Ctr, Heyuan 517000, Guangdong, Peoples R China

关键词： Citrus pulp byproduct; Spoilage inhibition; Geotrichum candidum; Sour odor

期刊名称：FOOD BIOSCIENCE （ 影响因子：5.9； 五年影响因子：6.1 ）

ISSN： 2212-4292

年卷期： 2025 年 63 卷

页码：

收录情况： SCI

摘要： The increasing production of Citri Reticulatae Pericarpium (Chenpi) has led to a surge in the generation of citrus pulp byproducts; however, its recycling remains inadequate due to rapid spoilage. Developing sustainable storage methods to facilitate recycling initiatives is essential. In this study, a newly isolated strain, Geotrichum candidum AGRC-GC1, characterized by its robust ability to occupy ecological niches and suppress other microorganisms, was employed to inhibit spoilage in citrus pulp. AGRC-GC1 rapidly colonized the pulp, comprising 98.5% of the fungal microbiota, thereby protecting it from invasion by spoilage microorganisms including Saccharomyces, Torulaspora, Podosphaera, and Aureobasidium. This colonization slowed sugar consumption, preventing acidification and maintaining a pH of 3.86, compared to a control value of 3.48. Key molecules associated with the sour odor of spoilage, namely 3-aminoisobutyric acid (AIBA) and D-gluconic acid (GA), were significantly reduced by AGRC-GC1 treatment, effectively eliminating the sour odor. Additionally, two esters, glycerol-AIBA and erythritol-GA, were found to exhibit a strong sour odor associated with spoilage. Furthermore, AGRC-GC1 demonstrated the ability to synthesize a 3.45-fold increase in tyrosol, which enhanced the antioxidant activity in the pulp. Moreover, AGRC-GC1 regulated water activity by synthesizing glucitol and erythritol, with increases of 11.11- and 2.27-fold, respectively. These findings offer new insights into the citrus spoilage process in natural environments and highlight the potential of AGRC-GC1 in the recycling and utilization of citrus pulp byproducts.

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