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Article ; Online: Tryptophan enhances biocontrol efficacy of Metschnikowia citriensis FL01 against postharvest fungal diseases of citrus fruit by increasing pulcherriminic acid production.

Zhang, Hongyan / Wang, Shupei / Yi, Lanhua / Zeng, Kaifang

International journal of food microbiology

2022 Volume 386, Page(s) 110013

Abstract: The aim of this work was to study the capability and mechanism of enhancing the yield of pulcherriminic acid (PA) produced by Metschnikowia citriensis FL01 with the help of tryptophan for the control of postharvest diseases on citrus caused by ... ...

Abstract	The aim of this work was to study the capability and mechanism of enhancing the yield of pulcherriminic acid (PA) produced by Metschnikowia citriensis FL01 with the help of tryptophan for the control of postharvest diseases on citrus caused by Penicillium italicum, Geotrichum citri-aurantii and Penicillium digitatum. The adding of 10 mmol/L tryptophan to the growth medium resulted in the widest pulcherrimin pigment zone produced by M. citriensis FL01. The adding of tryptophan to the growth medium upregulated A3136 and A3022 gene expression (responsible for leucyl-tRNA biosynthesis from leucine), downregulated A1350 gene expression (responsible for the biosynthesis of leucine to branched-chain fatty acids), and decreased the content of intracellular leucine in M. citriensis FL01, speculating that the addition of tryptophan in the growth medium induced leucine conversion toward leucyl-tRNA in M. citriensis FL01. Moreover, the adding of tryptophan to the growth medium upregulated PULs (responsible PA biosynthesis) and Snf2 (transcriptional regulator) gene expression and promoted intracellular, extracellular or total PA production by M. citriensis FL01 in liquid medium. In addition, the addition of tryptophan in the growth medium showed no effect on the growth of M. citriensis FL01 itself in liquid medium, while the population dynamics in citrus fruit wounds of M. citriensis FL01 with the addition of tryptophan in the growth medium were increased compared with those of M. citriensis FL01. What's more, M. citriensis FL01 with the addition of tryptophan in the growth medium completely inhibited the growth of pathogens in vitro. The disease incidences and lesion diameters of blue mold, sour rot and green mold on citrus fruit were lower in group which treated with M. citriensis FL01 containing tryptophan in the growth medium than that treated with M. citriensis FL01 alone. Overall, the postharvest biocontrol of citrus with M. citriensis FL01 containing 10 mmol/L tryptophan in the growth medium is a promising approach to protect these fruits from blue mold, sour rot and green mold.
Language	English
Publishing date	2022-11-11
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	87122-9
ISSN	1879-3460 ; 0168-1605
ISSN (online)	1879-3460
ISSN	0168-1605
DOI	10.1016/j.ijfoodmicro.2022.110013
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Article: Association between the traditional Chinese medicine constitution and metabolic dysfunction-associated fatty liver disease in older people: A cross-sectional study.

Shen, Tianran / Wang, Shupei / Wang, Zhihao / Jia, Hanlu / Wei, Yuan / Li, Yu / Zheng, Qiutong / Li, Yuting / Pan, Luanzhao / Chen, Qingsong

Heliyon

2024 Volume 10, Issue 3, Page(s) e24905

Abstract: Background: Few studies have focused on the relationship between the traditional Chinese medicine constitution (TCMC) and metabolic dysfunction-associated fatty liver disease (MAFLD) in older populations. We sought to investigate the distribution of ... ...

Abstract	Background: Few studies have focused on the relationship between the traditional Chinese medicine constitution (TCMC) and metabolic dysfunction-associated fatty liver disease (MAFLD) in older populations. We sought to investigate the distribution of MAFLD and the TCMC in older people, and provide a theoretical basis for TCMC-based management of MAFLD in this population. Methods: A cross-sectional study was conducted among older (≥65 years) individuals in Zhongshan, China. Information on common sociodemographic characteristics, medical history, anthropometric measurements, and the TCMC was collected. The chi-square test, multivariable logistic regression analysis, subgroup analysis, and inverse probability weighting of the propensity score were used to explore the relationship between MAFLD and the TCMC. Results: Of 7085 participants, 1408 (19.9 %) had MAFLD. The three most common TCMC types in MAFLD patients were "phlegm-dampness", "gentleness", and "yin-deficiency". After adjustment for gender, age, tobacco smoking, alcohol consumption, body mass index, abnormal waist-to-hip ratio, hypertension, diabetes mellitus, and dyslipidemia, MAFLD was positively associated with the phlegm-dampness constitution (PDC) (OR Conclusions: A positive relationship was observed between MAFLD and the PDC in older people living in Zhongshan. Early detection and treatment of the PDC (especially in men and smokers) could prevent the occurrence and development of MAFLD.
Language	English
Publishing date	2024-01-18
Publishing country	England
Document type	Journal Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2024.e24905
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Article ; Online: 5.1 µm Ion-Regulated Rigid Quasi-Solid Electrolyte Constructed by Bridging Fast Li-Ion Transfer Channels for Lithium Metal Batteries.

Liu, Yangxi / Wang, Suqing / Chen, Weicheng / Kong, Wenhan / Wang, Shupei / Liu, Haixing / Ding, Li / Ding, Liang-Xin / Wang, Haihui

Advanced materials (Deerfield Beach, Fla.)

2024 , Page(s) e2401837

Abstract: An ultra-thin quasi-solid electrolyte (QSE) with dendrite-inhibiting properties is a requirement for achieving high energy density quasi-solid lithium metal batteries (LMBs). Here, a 5.1 µm rigid QSE layer is directly designed on the cathode, in which ... ...

Abstract	An ultra-thin quasi-solid electrolyte (QSE) with dendrite-inhibiting properties is a requirement for achieving high energy density quasi-solid lithium metal batteries (LMBs). Here, a 5.1 µm rigid QSE layer is directly designed on the cathode, in which Kevlar (poly(p-phenylene terephthalate)) nanofibers (KANFs) with negatively charged groups bridging metal-organic framework (MOF) particles are served as a rigid skeleton, and non-flammable deep eutectic solvent is selected to be encapsulated into the MOF channels, combined with in situ polymerization to complete safe electrolyte system with high rigidness and stability. The QSE with constructed topological network demonstrates high rigidity (5.4 GPa), high ionic conductivity (0.73 mS cm
Language	English
Publishing date	2024-04-29
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1474949-X
ISSN	1521-4095 ; 0935-9648
ISSN (online)	1521-4095
ISSN	0935-9648
DOI	10.1002/adma.202401837
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Article ; Online: The effect of pulcherriminic acid produced by Metschnikowia citriensis in controlling postharvest diseases of citrus fruits.

Zhang, Hongyan / Wang, Shupei / Deng, Qian / Zhang, Xiong / Liao, Bi / Huang, Jian / Zeng, Kaifang

Pesticide biochemistry and physiology

2023 Volume 197, Page(s) 105657

Abstract: The biocontrol effectiveness of Metschnikowia citriensis relies on its production of pulcherriminic acid (PA), which forms insoluble and stable pulcherrimin pigments by chelating iron ions, this inhibits pathogen growth by preventing their utilization of ...

Abstract	The biocontrol effectiveness of Metschnikowia citriensis relies on its production of pulcherriminic acid (PA), which forms insoluble and stable pulcherrimin pigments by chelating iron ions, this inhibits pathogen growth by preventing their utilization of chelated Fe
MeSH term(s)	Citrus ; Fruit ; Tryptophan ; Plant Diseases/prevention & control ; Plant Diseases/genetics
Chemical Substances	pulcherriminic acid (957-86-8) ; Tryptophan (8DUH1N11BX)
Language	English
Publishing date	2023-10-31
Publishing country	United States
Document type	Journal Article
ZDB-ID	184819-7
ISSN	1095-9939 ; 0048-3583 ; 0048-3575
ISSN (online)	1095-9939
ISSN	0048-3583 ; 0048-3575
DOI	10.1016/j.pestbp.2023.105657
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Article: Influence of arginine on the biocontrol efficiency of Metschnikowia citriensis against Geotrichum citri-aurantii causing sour rot of postharvest citrus fruit

Wang, Shupei / Zhang, Hongyan / Qi, Teng / Deng, Lili / Yi, Lanhua / Zeng, Kaifang

Food microbiology. 2022 Feb., v. 101

2022

Abstract: This study investigated the effect of arginine (Arg) on the antagonistic activity of Metschnikowia citriensis against sour rot caused by Geotrichum citri-aurantii in postharvest citrus, and evaluated the possible mechanism therein. Arg treatment up- ... ...

Abstract	This study investigated the effect of arginine (Arg) on the antagonistic activity of Metschnikowia citriensis against sour rot caused by Geotrichum citri-aurantii in postharvest citrus, and evaluated the possible mechanism therein. Arg treatment up-regulated the PUL genes expression, and significantly induced the pulcherriminic acid (PA) production of M. citriensis, which related to the capability of iron depletion of M. citriensis. By comparing the biocontrol effects of Arg-treated and untreated yeast cells, it was found that Arg treatment significantly enhanced the biocontrol efficacy of M. citriensis, and 5 mmol L⁻¹ Arg exerted the best effect. Additionally, the biofilm formation ability of M. citriensis was greatly enhanced by Arg, and the higher population density of yeast cells in citrus wounds was also observed in Arg treatment groups stored both at 25 °C and 4 °C. Moreover, Arg was shown to function as a cell protectant to elevate antioxidant enzyme activity [including catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GPX)] and intracellular trehalose content to resist oxidative stress damage, that directly helped to enhance colonization ability of yeasts in fruit wounds. These results suggest the application of Arg is a useful approach to improve the biocontrol performance of M. citriensis.
Keywords	Citrus ; Geotrichum ; Metschnikowia ; antioxidant enzymes ; arginine ; biofilm ; biological control ; catalase ; citrus fruits ; colonizing ability ; enzyme activity ; food microbiology ; fruits ; glutathione peroxidase ; oxidative stress ; population density ; superoxide dismutase ; trehalose ; yeasts
Language	English
Dates of publication	2022-02
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	50892-5
ISSN	1095-9998 ; 0740-0020
ISSN (online)	1095-9998
ISSN	0740-0020
DOI	10.1016/j.fm.2021.103888
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Correlation analysis of anthropometric indices and type 2 diabetes mellitus in residents aged 60 years and older.

Feng, Xiaoyan / Wang, Junyi / Wang, Shupei / Wu, Shan / Wang, Zhihao / Wei, Yuan / Li, Lvrong / Shen, Tianran / Chen, Qingsong

Frontiers in public health

2023 Volume 11, Page(s) 1122509

Abstract: Background and purpose: In recent years, the incidence of obesity in people aged 60 and over has increased significantly, and abdominal obesity has been recognized as an independent risk factor for diabetes. Aging causes physiologic decline in multiple ... ...

Abstract	Background and purpose: In recent years, the incidence of obesity in people aged 60 and over has increased significantly, and abdominal obesity has been recognized as an independent risk factor for diabetes. Aging causes physiologic decline in multiple body systems, leading to changes in obesity indicators such as BMI. At present, the relationship between abdominal obesity markers and Diabetes mellitus (DM) in people aged 60 years and older remains unclear. Therefore, it is necessary to study the correlation between anthropometric indices and diabetes and explore potential predictors. Methods: The basic demographic information of participants aged 60 and above in Zhongshan City in 2020 was collected. Physical parameters, blood glucose and other biochemical indices were measured comprehensively. Binary logistic regression analysis was used to explore the relationship between abdominal obesity indicators [Waist circumference, Neck Circumference, Waist-to-hip ratio, Chinese Visceral Obesity Index (CVAI), and visceral obesity index] and diabetes mellitus. ROC characteristic curve was used to analyze the predictive ability of abdominal obesity indicators to DM, and the non-restrictive cubic spline graph was used to visualize the screened obesity indicators and diabetes risk. Results: Among 9,519 participants, the prevalence of diabetes was 15.5%. Compared with low CVAI, High CVAI level was significantly associated with increased prevalence of DM in males and females (all Conclusion: Among these anthropometric indices, CVAI is consistent with the features of fat distribution in older individuals and shows superior discriminative power as a potential predictor of DM, compared to traditional anthropometric parameters.
MeSH term(s)	Male ; Female ; Humans ; Middle Aged ; Aged ; Diabetes Mellitus, Type 2/epidemiology ; Diabetes Mellitus, Type 2/complications ; Obesity, Abdominal/epidemiology ; Obesity, Abdominal/complications ; Body Mass Index ; Anthropometry ; Obesity/epidemiology ; Obesity/complications
Language	English
Publishing date	2023-03-29
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2711781-9
ISSN	2296-2565 ; 2296-2565
ISSN (online)	2296-2565
ISSN	2296-2565
DOI	10.3389/fpubh.2023.1122509
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Article: Iron Competition as an Important Mechanism of Pulcherrimin-Producing

Wang, Shupei / Tan, Zhimei / Wang, Chenshu / Liu, Wenqing / Hang, Fangxue / He, Xuemei / Ye, Dongqing / Li, Li / Sun, Jian

Foods (Basel, Switzerland)

2023 Volume 12, Issue 23

Abstract: This study identified and tested fruit- ... ...

Abstract	This study identified and tested fruit-isolated
Language	English
Publishing date	2023-11-24
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2704223-6
ISSN	2304-8158
ISSN	2304-8158
DOI	10.3390/foods12234249
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Article: Metschnikowia citriensis FL01 antagonize Geotrichum citri-aurantii in citrus fruit through key action of iron depletion

Wang, Shupei / Zhang, Hongyan / Ruan, Changqing / Yi, Lanhua / Deng, Lili / Zeng, Kaifang

International journal of food microbiology. 2021 Nov. 02, v. 357

2021

Abstract: Metschnikowia citriensis FL01 has great potential for biocontrol applications for its excellent biocontrol efficacy on postharvest diseases of citrus fruit, and the iron depletion by pulcherriminic acid (PA) and then formation of insoluble pigment ... ...

Abstract	Metschnikowia citriensis FL01 has great potential for biocontrol applications for its excellent biocontrol efficacy on postharvest diseases of citrus fruit, and the iron depletion by pulcherriminic acid (PA) and then formation of insoluble pigment pulcherrimin had been speculated as an important action mechanism. To identify the genes involved in pulcherrimin synthesis and reutilization in M. citriensis FL01, we de novo assembled the genome of M. citriensis FL01 based on long-read PacBio sequencing. The final assembled genome consisted of 12 contigs with a genome size of 25.74 Mb, G + C content of 49.16% and 9310 protein-coding genes. The genome-wide BLAST of the PUL genes of M. pulcherrima APC 1.2 showed that the four PUL genes were clustered and located on Contig 4 of M. citriensis FL01. In order to further clarify the role of pulcherrimin pigment on biocontrol of M. citriensis FL01, CRISPR/cas9 technology was used to knock out PUL2 gene that was responsible for PA synthesis and the pigmentless mutants with stable phenotype were obtained. The mutant strains of M. citriensis FL01 lost the ability to produce pulcherrimin pigment, and simultaneously lost the ability to inhibit the growth of Geotrichum citri-aurantii in vitro. Moreover, the biocontrol efficacy of pigmentless mutant strains against sour rot was about 80% lower than that of wild-type M. citriensis FL01. These results directly proved that the iron depletion was an important mechanism of M. citriensis FL01.
Keywords	CRISPR-Cas systems ; Geotrichum ; biological control ; citrus fruits ; food microbiology ; genes ; mutants ; phenotype
Language	English
Dates of publication	2021-1102
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	87122-9
ISSN	1879-3460 ; 0168-1605
ISSN (online)	1879-3460
ISSN	0168-1605
DOI	10.1016/j.ijfoodmicro.2021.109384
Database	NAL-Catalogue (AGRICOLA)

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Article: Controlling pepper soft rot by Lactobacillus paracasei WX322 and identification of multiple bacteriocins by complete genome sequencing

Qi, Teng / Wang, Shupei / Deng, Lili / Yi, Lanhua / Zeng, Kaifang

Food control. 2021 Mar., v. 121

2021

Abstract: Bacterial soft rot is a devastating disease that harms vegetables. Lactic acid bacteria (LAB) can be effective antagonist against soft rot pathogens. In this study, Lactobacillus paracasei WX322 and its produced bacteriocin had antibacterial activities ... ...

Abstract	Bacterial soft rot is a devastating disease that harms vegetables. Lactic acid bacteria (LAB) can be effective antagonist against soft rot pathogens. In this study, Lactobacillus paracasei WX322 and its produced bacteriocin had antibacterial activities against a variety of foodborne pathogens and spoilage bacteria, including both Gram-positive and Gram-negative bacteria, especially the soft rot pathogen Pectobacterium carotovorum subsp. brasiliense BZA12 (Pcb BZA12). The in vivo antibacterial test proved that the bacteriocin produced by the L. paracasei WX322 could control soft rot disease of peppers caused by Pcb BZA12. The L.paracasei WX322 produced bacteriocin after fermentation for 36 h, which had broad antimicrobial activity. In addition, the bacteriocin produced by L. paracasei WX322 had good thermal stability and broad pH adaptation. Then, the complete genome of L. paracasei WX322 was sequenced with one circular chromosome and eight plasmids. Three bacteriocin gene clusters were identified in the genome by antiSMASH. Furthermore, seven genes in the three gene clusters were identified to be bacteriocins. Moreover, three of the seven bacteriocins were novel. The complete genome sequences of the L. paracasei WX322 can provide a better molecular basis of its antibacterial activity and biocontrol effect on bacterial soft rot disease.
Keywords	Gram-negative bacteria ; Lactobacillus paracasei ; antagonists ; antibacterial properties ; bacterial soft rot ; bacteriocins ; biological control ; chromosomes ; fermentation ; food pathogens ; food safety ; lactic acid bacteria ; multigene family ; pH ; peppers ; plasmids ; sequence analysis ; spoilage bacteria ; thermal stability
Language	English
Dates of publication	2021-03
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	1027805-9
ISSN	0956-7135
ISSN	0956-7135
DOI	10.1016/j.foodcont.2020.107629
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Metschnikowia citriensis FL01 antagonize Geotrichum citri-aurantii in citrus fruit through key action of iron depletion.

Wang, Shupei / Zhang, Hongyan / Ruan, Changqing / Yi, Lanhua / Deng, Lili / Zeng, Kaifang

International journal of food microbiology

2021 Volume 357, Page(s) 109384

Abstract	Metschnikowia citriensis FL01 has great potential for biocontrol applications for its excellent biocontrol efficacy on postharvest diseases of citrus fruit, and the iron depletion by pulcherriminic acid (PA) and then formation of insoluble pigment pulcherrimin had been speculated as an important action mechanism. To identify the genes involved in pulcherrimin synthesis and reutilization in M. citriensis FL01, we de novo assembled the genome of M. citriensis FL01 based on long-read PacBio sequencing. The final assembled genome consisted of 12 contigs with a genome size of 25.74 Mb, G + C content of 49.16% and 9310 protein-coding genes. The genome-wide BLAST of the PUL genes of M. pulcherrima APC 1.2 showed that the four PUL genes were clustered and located on Contig 4 of M. citriensis FL01. In order to further clarify the role of pulcherrimin pigment on biocontrol of M. citriensis FL01, CRISPR/cas9 technology was used to knock out PUL2 gene that was responsible for PA synthesis and the pigmentless mutants with stable phenotype were obtained. The mutant strains of M. citriensis FL01 lost the ability to produce pulcherrimin pigment, and simultaneously lost the ability to inhibit the growth of Geotrichum citri-aurantii in vitro. Moreover, the biocontrol efficacy of pigmentless mutant strains against sour rot was about 80% lower than that of wild-type M. citriensis FL01. These results directly proved that the iron depletion was an important mechanism of M. citriensis FL01.
MeSH term(s)	Citrus ; Geotrichum ; Iron ; Metschnikowia
Chemical Substances	Iron (E1UOL152H7)
Language	English
Publishing date	2021-09-07
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	87122-9
ISSN	1879-3460 ; 0168-1605
ISSN (online)	1879-3460
ISSN	0168-1605
DOI	10.1016/j.ijfoodmicro.2021.109384
Database	MEDical Literature Analysis and Retrieval System OnLINE

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