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The GRAS Salts of Na2SiO3 and EDTA-Na-2 Control Citrus Postharvest Pathogens by Disrupting the Cell Membrane

文献类型： 外文期刊

作者： Zhao, Juan 1 ; Wang, Yuqing 1 ; Liu, Qianyi 1 ; Liu, Shuqi 1 ; Pan, Hui 1 ; Cheng, Yunjiang 1 ; Long, Chaoan 1 ;

作者机构： 1.Huazhong Agr Univ, Natl R&D Ctr Citrus Preservat, Natl Ctr Citrus Breeding, Natl Key Lab Germplasm Innovat & Utilizat Hort Cro, Wuhan 430070, Peoples R China

2.Huazhong Agr Univ, Shenzhen Inst Nutr & Hlth, Wuhan 430070, Peoples R China

3.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Guangdong Lab Lingnan Modern Agr, Shenzhen Branch,Genome Anal Lab,Minist Agr, Shenzhen 518120, Peoples R China

关键词： GRAS salts; EC50; postharvest pathogens; spore germination; lipid droplets

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 12 期

页码：

收录情况： SCI

摘要： Sodium silicate (Na2SiO3) and ethylenediaminetetraacetic acid disodium salt (EDTA-Na-2) are inorganic salts classified as 'Generally Recognized as Safe' (GRAS) compounds with great advantages in controlling various pathogens of postharvest fruits and vegetables. Here, we determined the median effective concentration (EC50) of Na2SiO3 (0.06%, 0.05%, 0.07% and 0.08%) and EDTA-Na-2 (0.11%, 0.08%, 0.5%, and 0.07%) against common pathogens affecting postharvest citrus fruit, including Penicillium digitatum, Penicillium italicum, Geotrichum citri-aurantii, and Colletotrichum gloeosporioides. Na2SiO3 and EDTA-Na-2 treatments at the EC50 decreased the spore germination rate, visibly disrupted the spore cell membrane integrity, and significantly increased the lipid droplets (LDs) of the four postharvest pathogens. Moreover, both treatments at EC50 significantly reduced the disease incidence of P. italicum (by 60% and 93.335, respectively) and G. citri-aurantii (by 50% and 76.67%, respectively) relative to the control. Furthermore, Na2SiO3 and EDTA-Na-2 treatment resulted in dramatically lower disease severity of the four pathogens, while also demonstrating no significant change in citrus fruit quality compared with the control. Therefore, Na2SiO3 and EDTA-Na-2 present a promising approach to control the postharvest diseases of citrus fruit.

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