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NaCl inhibits Geotrichum citri-aurantii growth by inducing lipid droplets accumulation and enhances the biocontrol efficacy of Kloeckera apiculata 34-9

文献类型： 外文期刊

作者： Zhao, Juan 1 ; Wang, Yuqing 2 ; Liu, Qianyi 2 ; Long, Chaoan 2 ;

作者机构： 1.Kunming Univ Sci & Technol, Fac Food Sci & Engn, Kunming 650500, Yunnan, Peoples R China

2.Huazhong Agr Univ, Natl R&D Ctr Citrus Preservat, Natl Ctr Citrus Breeding, Key Lab Hort Plant Biol,Minist Educ, Wuhan 430070, Hubei, Peoples R China

3.Huazhong Agr Univ, Shenzhen Inst Nutr & Hlth, Shenzhen 518000, Guangdong, Peoples R China

4.Chinese Acad Agr Sci, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr, Genome Anal Lab,Minist Agr,Agr Genom Inst Shenzhen, Shenzhen 518000, Peoples R China

关键词： NaCl; Geotrichum citri-aurantii; Kloeckera apiculata; LDs; Postharvest preservation; Citrus

期刊名称：HORTICULTURAL PLANT JOURNAL （ 影响因子：6.2； 五年影响因子：6.1 ）

ISSN： 2095-9885

年卷期： 2025 年 11 卷 1 期

页码：

收录情况： SCI

摘要： Decays resulting from infections by Geotrichum citri-aurantii cause a significant reduction in citrus postharvest quality and marketable yield. In the present work, 0.8 mol L-1 NaCl of Generally Recognized as Safe (GRAS) salts were identified to have complete inhibition activity to G. citriaurantii in vitro and in vivo. An inhibitory mechanism study showed that 0.1 mol L-1 NaCl changed the expression of six genes (Gci002087, Gci003354, Gci000013, Gci000394, Gci003505 and Gci004433) in target of rapamycin (TOR) pathway, thus inducing a large number of lipid droplets (LDs) accumulation with TEM observations and staining. In vivo, 0.1 mol L-1 NaCl could raise up the activities of CAT, PAL, PPO and cellulase which hence to strengthen the ability of resistance tolerance of citrus. In addition, NaCl not only accelerated the growth of the biocontrol yeast Kloeckera apiculata strain 34-9, but also increased the expression level of adhesin-encoding genes and biofilm-formation encoding gene (34-9- 3691). Finally, the storage experiments in 3 months demonstrated that the combination of NaCl and the yeast 34-9 could keep fresh, reduce decay and prolong its shelf-life, thus implying that the combination of biocontrol strain and GRAS salts has been explored as a promising alternative to synthetic fungicides.

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