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Liu Y, Zhao L, Chen H, Ye Z, Guo L, Zhou Z. Nobiletin enhances the antifungal activity of eugenol nanoemulsion against Penicillium italicum in both in vitro and in vivo settings. Int J Food Microbiol 2024; 420:110769. [PMID: 38823189 DOI: 10.1016/j.ijfoodmicro.2024.110769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 05/19/2024] [Accepted: 05/29/2024] [Indexed: 06/03/2024]
Abstract
The study prepared and used eugenol nanoemulsion loaded with nobiletin as fungistat to study its antifungal activity and potential mechanism of Penicillium italicum (P. italicum). The results showed that the minimum inhibitory concentration (MIC) of eugenol nanoemulsion loaded with nobiletin (EGN) was lower than that of pure eugenol nanoemulsion (EG), which were 160 μg/mL and 320 μg/mL, respectively. At the same time, the mycelial growth inhibition rate of EGN nanoemulsion (54.68 %) was also higher than that of EG nanoemulsion (9.92 %). This indicates that EGN nanoemulsion is more effective than EG nanoemulsion. Compared with EG nanoemulsion, the treatment of EGN nanoemulsion caused more serious damage to the cell structure of P. italicum. At the same time, in vitro inoculation experiments found that EGN nanoemulsion has better control and delay the growth and reproduction of P. italicum in citrus fruits. And the results reflected that EGN nanoemulsion may be considered as potential resouces of natural antiseptic to inhibit blue mold disease of citrus fruits, because it has good antifungal activity.
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Affiliation(s)
- Yanchi Liu
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, China
| | - Lintao Zhao
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, China
| | - Hongyang Chen
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, China
| | - Zimao Ye
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, China
| | - Long Guo
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, China
| | - Zhiqin Zhou
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400716, China; The Southwest Institute of Fruits Nutrition, Banan District, Chongqing 400054, China; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Southwest University, Chongqing 400715, China.
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Zambounis A, Boutsika A, Gray N, Hossain M, Chatzidimopoulos M, Tsitsigiannis DI, Paplomatas E, Hane J. Pan-genome survey of Septoria pistaciarum, causal agent of Septoria leaf spot of pistachios, across three Aegean sub-regions of Greece. Front Microbiol 2024; 15:1396760. [PMID: 38919498 PMCID: PMC11196620 DOI: 10.3389/fmicb.2024.1396760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 05/20/2024] [Indexed: 06/27/2024] Open
Abstract
Septoria pistaciarum, a causal agent of Septoria leaf spot disease of pistachio, is a fungal pathogen that causes substantial losses in the cultivation, worldwide. This study describes the first pan-genome-based survey of this phytopathogen-comprising a total of 27 isolates, with 9 isolates each from 3 regional units of Greece (Pieria, Larissa and Fthiotida). The reference isolate (SPF8) assembled into a total of 43.1 Mb, with 38.6% contained within AT-rich regions of approximately 37.5% G:C. The genomes of the 27 isolates exhibited on average 42% gene-coding and 20% repetitive regions. The genomes of isolates from the southern Fthiotida region appeared to more diverged from each other than the other regions based on SNP-derived trees, and also contained isolates similar to both the Pieria and Larissa regions. In contrast, isolates of the Pieria and Larissa were less diverse and distinct from one another. Asexual reproduction appeared to be typical, with no MAT1-2 locus detected in any isolate. Genome-based prediction of infection mode indicated hemibiotrophic and saprotrophic adaptations, consistent with its long latent phase. Gene prediction and orthology clustering generated a pan-genome-wide gene set of 21,174 loci. A total of 59 ortholog groups were predicted to contain candidate effector proteins, with 36 (61%) of these either having homologs to known effectors from other species or could be assigned predicted functions from matches to conserved domains. Overall, effector prediction suggests that S. pistaciarum employs a combination of defensive effectors with roles in suppression of host defenses, and offensive effectors with a range of cytotoxic activities. Some effector-like ortholog groups presented as divergent versions of the same protein, suggesting region-specific adaptations may have occurred. These findings provide insights and future research directions in uncovering the pathogenesis and population dynamics of S. pistaciarum toward the efficient management of Septoria leaf spot of pistachio.
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Affiliation(s)
- Antonios Zambounis
- Hellenic Agricultural Organization - DIMITRA (ELGO - DIMITRA), Institute of Plant Breeding and Genetic Resources, Thessaloniki, Greece
| | - Anastasia Boutsika
- Hellenic Agricultural Organization - DIMITRA (ELGO - DIMITRA), Institute of Plant Breeding and Genetic Resources, Thessaloniki, Greece
| | - Naomi Gray
- Centre for Crop and Disease Management, Department of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
| | - Mohitul Hossain
- Centre for Crop and Disease Management, Department of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
| | - Michael Chatzidimopoulos
- Laboratory of Plant Pathology, Department of Agriculture, International Hellenic University, Thessaloniki, Greece
| | - Dimitrios I. Tsitsigiannis
- Laboratory of Plant Pathology, Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - Epaminondas Paplomatas
- Laboratory of Plant Pathology, Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - James Hane
- Centre for Crop and Disease Management, Department of Molecular and Life Sciences, Curtin University, Perth, WA, Australia
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Xu M, Godana EA, Li J, Deng Y, Ma Y, Ya H, Zhang H. Infection of postharvest pear by Penicillium expansum is facilitated by the glycoside hydrolase (eglB) gene. Int J Food Microbiol 2024; 410:110465. [PMID: 37980812 DOI: 10.1016/j.ijfoodmicro.2023.110465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/16/2023] [Accepted: 10/30/2023] [Indexed: 11/21/2023]
Abstract
The primary reason for postharvest loss is blue mold disease which is mainly caused by Penicillium expansum. Strategies for disease control greatly depend on the understanding of mechanisms of pathogen-fruit interaction. A member of the glycoside hydrolase family, β-glucosidase 1b (eglB), in P. expansum was significantly upregulated during postharvest pear infection. Glycoside hydrolases are a large group of enzymes that can degrade plant cell wall polymers. High homology was found between the glycoside hydrolase superfamily in P. expansum. Functional characterization and analysis of eglB were performed via gene knockout and complementation analysis. Although eglB deletion had no notable effect on P. expansum colony shape or microscopic morphology, it did reduce the production of fungal hyphae, thereby reducing P. expansum's sporulation and patulin (PAT) accumulation. Moreover, the deletion of eglB (ΔeglB) reduced P. expansum pathogenicity in pears. The growth, conidia production, PAT accumulation, and pathogenicity abilities of ΔeglB were restored to that of wild-type P. expansum by complementation of eglB (ΔeglB-C). These findings indicate that eglB contributes to P. expansum's development and pathogenicity. This research is a contribution to the identification of key effectors of fungal pathogenicity for use as targets in fruit safety strategies.
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Affiliation(s)
- Meiqiu Xu
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, Henan, People's Republic of China
| | - Esa Abiso Godana
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
| | - Jingyu Li
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, Henan, People's Republic of China
| | - Yaping Deng
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, Henan, People's Republic of China
| | - Yufei Ma
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, Henan, People's Republic of China
| | - Huiyuan Ya
- College of Food and Drug, Luoyang Normal University, Luoyang 471934, Henan, People's Republic of China.
| | - Hongyin Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China.
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Zhao L, Hu Y, Liang L, Dhanasekaran S, Zhang X, Yang X, Wu M, Song Y, Zhang H. WSC1 Regulates the Growth, Development, Patulin Production, and Pathogenicity of Penicillium expansum Infecting Pear Fruits. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:1025-1034. [PMID: 38181197 DOI: 10.1021/acs.jafc.3c07566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2024]
Abstract
In this study, the role of WSC1 in the infection of pear fruit by Penicillium expansum was investigated. The WSC1 gene was knocked out and complemented by Agrobacterium-mediated homologous recombination technology. Then, the changes in growth, development, and pathogenic processes of the knockout mutant and the complement mutant were analyzed. The results indicated that deletion of WSC1 slowed the growth rate, reduced the mycelial and spore yield, and reduced the ability to produce toxins and pathogenicity of P. expansum in pear fruits. At the same time, the deletion of WSC1 reduced the tolerance of P. expansum to cell wall stress factors, enhanced antioxidant capacity, decreased hypertonic sensitivity, decreased salt stress resistance, and was more sensitive to most metal ions. Our results confirmed that WSC1 plays an important role in maintaining cell wall integrity and responding to stress, toxin production, and the pathogenicity of P. expansum.
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Affiliation(s)
- Lina Zhao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
- Jinan Fruit Research Institute, All China Federation of Supply and Marketing Cooperatives, Jinan 250014, Shandong, People's Republic of China
- Colin Ratledge Center for Microbial Lipids, School of Agriculture Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, People's Republic of China
| | - Yize Hu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
| | - Luyi Liang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
| | - Solairaj Dhanasekaran
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
| | - Xiaoyun Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
| | - Xiangzheng Yang
- Jinan Fruit Research Institute, All China Federation of Supply and Marketing Cooperatives, Jinan 250014, Shandong, People's Republic of China
- College of Agriculture & Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Maoyu Wu
- Jinan Fruit Research Institute, All China Federation of Supply and Marketing Cooperatives, Jinan 250014, Shandong, People's Republic of China
| | - Yuanda Song
- Colin Ratledge Center for Microbial Lipids, School of Agriculture Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, People's Republic of China
| | - Hongyin Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People's Republic of China
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Belair M, Restrepo-Leal JD, Praz C, Fontaine F, Rémond C, Fernandez O, Besaury L. Botryosphaeriaceae gene machinery: Correlation between diversity and virulence. Fungal Biol 2023; 127:1010-1031. [PMID: 37142361 DOI: 10.1016/j.funbio.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 03/09/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023]
Abstract
The Botryosphaeriaceae family comprises numerous fungal pathogens capable of causing economically meaningful diseases in a wide range of crops. Many of its members can live as endophytes and turn into aggressive pathogens following the onset of environmental stress events. Their ability to cause disease may rely on the production of a broad set of effectors, such as cell wall-degrading enzymes, secondary metabolites, and peptidases. Here, we conducted comparative analyses of 41 genomes representing six Botryosphaeriaceae genera to provide insights into the genetic features linked to pathogenicity and virulence. We show that these Botryosphaeriaceae genomes possess a large diversity of carbohydrate-active enzymes (CAZymes; 128 families) and peptidases (45 families). Botryosphaeria, Neofusicoccum, and Lasiodiplodia presented the highest number of genes encoding CAZymes involved in the degradation of the plant cell wall components. The genus Botryosphaeria also exhibited the highest abundance of secreted CAZymes and peptidases. Generally, the secondary metabolites gene cluster profile was consistent in the Botryosphaeriaceae family, except for Diplodia and Neoscytalidium. At the strain level, Neofusicoccum parvum NpBt67 stood out among all the Botryosphaeriaceae genomes, presenting a higher number of secretome constituents. In contrast, the Diplodia strains showed the lowest richness of the pathogenicity- and virulence-related genes, which may correlate with their low virulence reported in previous studies. Overall, these results contribute to a better understanding of the mechanisms underlying pathogenicity and virulence in remarkable Botryosphaeriaceae species. Our results also support that Botryosphaeriaceae species could be used as an interesting biotechnological tool for lignocellulose fractionation and bioeconomy.
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Elicitation of Fruit Fungi Infection and Its Protective Response to Improve the Postharvest Quality of Fruits. STRESSES 2023. [DOI: 10.3390/stresses3010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Fruit diseases brought on by fungus infestation leads to postharvest losses of fresh fruit. Approximately 30% of harvested fruits do not reach consumers’ plates due to postharvest losses. Fungal pathogens play a substantial part in those losses, as they cause the majority of fruit rots and consumer complaints. Understanding fungal pathogenic processes and control measures is crucial for developing disease prevention and treatment strategies. In this review, we covered the presented pathogen entry, environmental conditions for pathogenesis, fruit’s response to pathogen attack, molecular mechanisms by which fungi infect fruits in the postharvest phase, production of mycotoxin, virulence factors, fungal genes involved in pathogenesis, and recent strategies for protecting fruit from fungal attack. Then, in order to investigate new avenues for ensuring fruit production, existing fungal management strategies were then assessed based on their mechanisms for altering the infection process. The goal of this review is to bridge the knowledge gap between the mechanisms of fungal disease progression and numerous disease control strategies being developed for fruit farming.
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