Biocontrol ability and possible mechanism of Metschnikowia pulcherrima against major diseases of postharvest citrus fruit and its biopreservative application

IF 5 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY
Wenqing Liu , Chaoyi Liu , Dexi Zeren , Shupei Wang , Zhimei Tan , Fangxue Hang , Xinquan Liang , Caifeng Xie , Kai Li
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Abstract

The capability of Metschnikowia pulcherrima to control postharvest citrus diseases was analyzed, with its action mechanisms and preservation performance during storage further explored. In vitro and in vivo tests demonstrated M. pulcherrima significantly inhibited the growth of Penicillium digitatum (P.d), Penicillium italicum (P.i), and Geotrichum citri-aurantii (G.c), and markedly controlled the incidence and progression of these three postharvest diseases. The non-cellular components of M. pulcherrima did not significantly inhibit three pathogens' growth, while its volatile compounds (VOCs) displayed notable inhibitory effects. Moreover, M. pulcherrima exhibited no parasitic effects on the mycelia of three pathogens. Nutritional competition experiment revealed that M. pulcherrima outcompeted the pathogens, utilizing fructose and glucose more rapidly and efficiently in nutrient-poor fruit wounds. Additionally, M. pulcherrima demonstrated a rapid proliferation and colonization ability on citrus fruit wounds and exhibited biofilm formation, thereby effectively preventing pathogen from contacting the fruit. Iron competition experiments indicated that exogenous FeCl3 significantly reduced M. pulcherrima's antifungal activity against P.d, P.i, and G.c, and its diseases control efficacy. Induced resistance tests demonstrated that M. pulcherrima significantly enhanced citrus fruit resistance to three diseases, with a particularly strong effect against sour rot. Storage tests over 180 d revealed that M. pulcherrima treatment significantly decreased the natural decay rate and maintained the quality indicators of citrus fruits. Overall, M. pulcherrima presented considerable potential as a biocontrol agent for effectively managing postharvest diseases in citrus fruits.
pulcherrima Metschnikowia对柑桔采后主要病害的防制能力、可能机制及其生物保鲜应用
分析了pulcherrima对柑桔采后病害的防治能力,并进一步探讨了其作用机制和贮藏过程中的保鲜性能。体外和体内试验表明,M. pulcherrima能显著抑制指状青霉(Penicillium digitatum, P.d)、意大利青霉(Penicillium italicum, P.i)和柑橘金地霉(Geotrichum citri-aurantii, G.c)的生长,并能显著控制这三种采后病害的发生和发展。pulcherrima的非细胞成分对3种病原菌的生长均无显著抑制作用,但其挥发性化合物(VOCs)具有显著抑制作用。此外,M. pulcherrima对3种病原菌的菌丝均无寄生作用。营养竞争实验表明,M. pulcherrima在营养贫乏的果实创伤中比病原菌更迅速、更有效地利用果糖和葡萄糖。此外,M. pulcherrima在柑橘果实伤口上表现出快速增殖和定植能力,并表现出生物膜的形成,从而有效地阻止了病原体与果实的接触。铁竞争实验表明,外源FeCl3显著降低了M. pulcherrima对P.d、P.i和G.c的抗真菌活性,降低了其防病效果。诱导抗性试验表明,紫皮霉显著增强了柑橘果实对3种病害的抗性,其中对酸腐病的抗性效果尤为明显。贮藏180 d后,紫皮霉处理显著降低了柑橘果实的自然腐烂率,保持了柑橘果实的品质指标。总之,作为一种有效防治柑桔采后病害的生物防治剂,pulcherrima具有相当大的潜力。
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来源期刊
International journal of food microbiology
International journal of food microbiology 工程技术-食品科技
CiteScore
10.40
自引率
5.60%
发文量
322
审稿时长
65 days
期刊介绍: The International Journal of Food Microbiology publishes papers dealing with all aspects of food microbiology. Articles must present information that is novel, has high impact and interest, and is of high scientific quality. They should provide scientific or technological advancement in the specific field of interest of the journal and enhance its strong international reputation. Preliminary or confirmatory results as well as contributions not strictly related to food microbiology will not be considered for publication.
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