1
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Li Z, Zhao W, Wang P, Zhao S, Wang D, Zhao X. Evolution of microbial community and the volatilome of fresh-cut chili pepper during storage under different temperature conditions: Correlation of microbiota and volatile organic compounds. Food Chem 2024; 451:139401. [PMID: 38685178 DOI: 10.1016/j.foodchem.2024.139401] [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: 11/07/2023] [Revised: 03/07/2024] [Accepted: 04/15/2024] [Indexed: 05/02/2024]
Abstract
The effect of temperature conditions on the evolution of microbial communities and volatile organic compounds (VOCs) in fresh-cut chili peppers during storage was investigated. Results showed that Proteobacteria and Actinobacteriota were the dominant phyla in fresh-cut chili peppers. During storage, bacterial communities changed more dramatically than fungi. Different temperature conditions significantly affected the shift of bacteria at the genus level. At the beginning of storage, Rhodococcus, Pantoea, and Pseudomonas dominated the bacteria. However, on day 8, Pantoea and Enterobacter became the predominant genera at 5 °C and high temperatures (10, 15 °C, dynamic temperature), respectively. No significant variability in bacterial species was observed between different batches. Additionally, 140 VOCs were determined in fresh-cut chili peppers. Twenty-two VOCs were screened and could be recommended as potential spoilage markers. Based on Spearman's correlation analysis results, Enterobacter and Enterococcus were the most positive microorganisms correlated with spoilage markers.
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Affiliation(s)
- Zudi Li
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China; Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Agricultural Products of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China
| | - Wenting Zhao
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Agricultural Products of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China.
| | - Pan Wang
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Agricultural Products of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China.
| | - Shuang Zhao
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Agricultural Products of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China.
| | - Dan Wang
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Agricultural Products of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China.
| | - Xiaoyan Zhao
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China; Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Agricultural Products of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China.
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2
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Epping R, Lisec J, Koch M. Changes in Black Truffle ( Tuber melanosporum) Aroma during Storage under Different Conditions. J Fungi (Basel) 2024; 10:354. [PMID: 38786709 PMCID: PMC11121890 DOI: 10.3390/jof10050354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/07/2024] [Accepted: 05/11/2024] [Indexed: 05/25/2024] Open
Abstract
The enticing aroma of truffles is a key factor for their culinary value. Although all truffle species tend to be pricy, the most intensely aromatic species are the most sought after. Research into the aroma of truffles encompasses various disciplines including chemistry, biology, and sensory science. This study focusses on the chemical composition of the aroma of black truffles (Tuber melanosporum) and the changes occurring under different storage conditions. For this, truffle samples were stored under different treatments, at different temperatures, and measured over a total storage time of 12 days. Measurements of the truffle aroma profiles were taken with SPME/GC-MS at regular intervals. To handle the ample data collected, a systematic approach utilizing multivariate data analysis techniques was taken. This approach led to a vast amount of data which we made publicly available for future exploration. Results reveal the complexity of aroma changes, with 695 compounds identified, highlighting the need for a comprehensive understanding. Principal component analyses offer initial insights into truffle composition, while individual compounds may serve as markers for age (formic acid, 1-methylpropyl ester), freshness (2-Methyl-1-propanal; 1-(methylthio)-propane), freezing (tetrahydrofuran), salt treatment (1-chloropentane), or heat exposure (4-hydroxy-3-methyl-2-butanone). This research suggests that heat treatment or salt contact significantly affects truffle aroma, while freezing and cutting have less pronounced effects in comparison. The enrichment of compounds showing significant changes during storage was investigated with a metabolomic pathway analysis. The involvement of some of the enriched compounds on the pyruvate/glycolysis and sulfur pathways was shown.
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Affiliation(s)
| | | | - Matthias Koch
- Department of Analytical Chemistry and Reference Materials, Bundesanstalt für Materialforschung und-Prüfung (BAM), 12489 Berlin, Germany; (R.E.); (J.L.)
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3
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Hou Z, Xia R, Li Y, Xu H, Wang Y, Feng Y, Pan S, Wang Z, Ren H, Qian G, Wang H, Zhu J, Xin G. Key components, formation pathways, affecting factors, and emerging analytical strategies for edible mushrooms aroma: A review. Food Chem 2024; 438:137993. [PMID: 37992603 DOI: 10.1016/j.foodchem.2023.137993] [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: 08/18/2023] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/24/2023]
Abstract
Aroma is one of the decisive factors affecting the quality and consumer acceptance of edible mushrooms. This review summarized the key components and formation pathways of edible mushroom aroma. It also elaborated on the affecting factors and emerging analytical strategies of edible mushroom aroma. A total of 1308 volatile organic compounds identified in edible mushrooms, 61 were key components. The formation of these compounds is closely related to fatty acid metabolism, amino acid metabolism, lentinic acid metabolism, and terpenoid metabolism. The aroma profiles of edible mushrooms were affected by genetic background, preharvest factors, and preservation methods. Molecular sensory science and omics techniques are emerging analytical strategies to reveal aroma information of edible mushrooms. This review would provide valuable data and insights for future research on edible mushroom aroma.
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Affiliation(s)
- Zhenshan Hou
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Rongrong Xia
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Yunting Li
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Heran Xu
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Yafei Wang
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Yao Feng
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Song Pan
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Zijian Wang
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Hongli Ren
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Guanlin Qian
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Huanyu Wang
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Jiayi Zhu
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China
| | - Guang Xin
- Shenyang Agricultural University, College of Food Science, Shenyang 110866, Liaoning, China; Liaoning Key Laboratory of Development and Utilization for Natural Products Active Molecules, Anshan 114007, Liaoning, China.
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4
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Li Q, Hu H, Tan X, Wang J, Mei R, Jiang F, Ling Y, Li X. Effects of Storage in an Active and Spontaneous Controlled O 2/CO 2 Atmosphere on Volatile Flavor Components and the Microbiome of Truffles. ACS OMEGA 2024; 9:9331-9347. [PMID: 38434872 PMCID: PMC10905597 DOI: 10.1021/acsomega.3c08375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 03/05/2024]
Abstract
This study explored the potential to improve the storage quality and prolong the shelf life of truffles by storing them in a modified atmosphere fresh-keeping box with sealed gas components of Active Modified Atmosphere Packaging (AMAP, 40% O2 + 60% CO2) at 4 °C. During the storage period, a total of 63 volatile components in 10 categories were detected, with aldehydes being the most abundant and the relative content of ethers being the highest. The relative odor activity value and principal component analysis revealed that isovaleraldehyde, 1-octen-3-ol, 1-octen-3-one, and dimethyl sulfide were the characteristic flavor components of fresh truffles. However, 3-methylthiopropionaldehyde and (E, E)-2,4-nonadienal were the components that caused the deterioration of truffle flavor and could potentially serve as markers of truffle decay characteristics. 16S rDNA high-throughput sequencing showed that Leuconostoc and Lactococcus were dominant in the truffle samples stored for 14 days, but the abundance of putrefactive pathogenic bacteria showed an increasing trend in the truffle samples stored for 28 days. During the whole storage period, the common fungi detected in the different treatment groups were Candida and Aspergillus. The relative abundance of the former decreased, while the relative abundance of the latter decreased initially and then increased. The correlation between volatile components and the microbial flora was further analyzed, which indicated that Lactococcus and Lactobacillus had the same contributions to the same flavor, while Pseudomonas and Glutamicibacter had the opposite contributions to the same flavor. The results provide a reference for the storage and preservation of truffles.
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Affiliation(s)
- Qiang Li
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Haiyang Hu
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Xingyi Tan
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Jianhui Wang
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Ruhuai Mei
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Fangguo Jiang
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Yunkun Ling
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Xiang Li
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
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5
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Tejedor-Calvo E, Garcia-Barreda S, Sebastián Dambolena J, Pelissero D, Sánchez S, Marco P, Nouhra E. Aromatic profile of black truffle grown in Argentina: Characterization of commercial categories and alterations associated to maturation, harvesting date and orchard management practices. Food Res Int 2023; 173:113300. [PMID: 37803611 DOI: 10.1016/j.foodres.2023.113300] [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: 05/19/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 10/08/2023]
Abstract
Black truffle (Tuber melanosporum) is one of the most appreciated fungi in the world mainly due to its aromatic properties. In the emerging markets such as Argentina, the aroma of locally produced truffles has not been described yet. The volatile organic compounds (VOCs) from 102 black truffles from Argentina were analyzed using solid phase microextraction gas chromatography coupled with mass spectrometer detector (SPME-GC-MS). Several factors such as commercial category, maturity stage, host tree, geographical origin, and aromatic defects detected during classification were also registered and considered. As a result, 79 VOCs were detected, among which 2-methyl-propanal, 2-butanone, 2-methyl-1-propanol, butanal-3-methyl, 3-methyl-1-butanol, 2-methyl-1-butanol were present in high percentage in fresh mature truffles, whereas immature truffles were associated with 3,5-dimethoxytoluene, 2-phenyl-2-butenal, 2,3-dimethoxytoluene. The Argentine black truffles showed significant similarities in their aromatic profile when compared with their Australian and European counterparts, but with some distinctive notes.
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Affiliation(s)
- Eva Tejedor-Calvo
- Department of Plant Science, Agrifood Research and Technology Centre of Aragon (CITA), Agrifood Institute of Aragón - IA2 (CITA-Zaragoza University), Av. Montañana, 930, 50059 Zaragoza, Spain.
| | - Sergi Garcia-Barreda
- Department of Plant Science, Agrifood Research and Technology Centre of Aragon (CITA), Agrifood Institute of Aragón - IA2 (CITA-Zaragoza University), Av. Montañana, 930, 50059 Zaragoza, Spain
| | - José Sebastián Dambolena
- Instituto Multidisciplinario de Biología Vegetal (CONICET), FCEFyN, Universidad Nacional de Córdoba (UNC), CC 495, CP 5000 Córdoba, Argentina
| | - David Pelissero
- Instituto Multidisciplinario de Biología Vegetal (CONICET), FCEFyN, Universidad Nacional de Córdoba (UNC), CC 495, CP 5000 Córdoba, Argentina
| | - Sergio Sánchez
- Department of Plant Science, Agrifood Research and Technology Centre of Aragon (CITA), Agrifood Institute of Aragón - IA2 (CITA-Zaragoza University), Av. Montañana, 930, 50059 Zaragoza, Spain
| | - Pedro Marco
- Department of Plant Science, Agrifood Research and Technology Centre of Aragon (CITA), Agrifood Institute of Aragón - IA2 (CITA-Zaragoza University), Av. Montañana, 930, 50059 Zaragoza, Spain
| | - Eduardo Nouhra
- Instituto Multidisciplinario de Biología Vegetal (CONICET), FCEFyN, Universidad Nacional de Córdoba (UNC), CC 495, CP 5000 Córdoba, Argentina
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Bucci A, Monaco P, Naclerio G. Tuber magnatum Picco: the challenge to identify ascoma-associated bacteria as markers for geographic traceability. Front Microbiol 2023; 14:1142214. [PMID: 37260692 PMCID: PMC10227511 DOI: 10.3389/fmicb.2023.1142214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 05/02/2023] [Indexed: 06/02/2023] Open
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7
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Tejedor-Calvo E, García-Barreda S, Sanz MÁ, Gracia AP, Sánchez S, Marco P. Black truffle aroma transfer kinetics to food matrices. Food Chem 2023; 417:135814. [PMID: 36898224 DOI: 10.1016/j.foodchem.2023.135814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 02/18/2023] [Accepted: 02/26/2023] [Indexed: 03/06/2023]
Abstract
Nowadays black truffles are so highly valued that truffled products are available in supermarkets whereas fresh truffle is mainly used in the restaurants. It is known that truffle aroma can change because heat treatments, but there is no scientific evidence about what molecules are transferred, in which concentration, and how much time is needed to aromatize products with truffle. In this study, four different fat-based food products (milk, sunflower oil, grapeseed oil and egg's yolk), were used to study black truffle (Tuber melanosporum) aroma transference for 14 days. Gas chromatography and olfactometry results showed different volatile organic compounds profile depending on the matrix used. After 24 h, some key truffle aromatic compounds were detected in all the food matrices. Among them, grape seed oil was the most aromatized product probably because of its odorless properties. According to our results, dimethyl disulphide, 3-methyl-1-butanol and 1-octen-3-one odorants showed the highest aromatization power.
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Affiliation(s)
- Eva Tejedor-Calvo
- Department of Plant Science, Agrifood Research and Technology Centre of Aragón (CITA). Avda. Montañana 930, 50059 Zaragoza, Spain.
| | - Sergi García-Barreda
- Department of Plant Science, Agrifood Research and Technology Centre of Aragón (CITA). Avda. Montañana 930, 50059 Zaragoza, Spain
| | - María Ángeles Sanz
- Laboratories and Technological Assistance, Agrifood Research and Technology Centre of Aragon (CITA), Avda. Montãnana, 50059 Zaragoza, Spain
| | - Ana Pilar Gracia
- Plant Food Research Group, Department of Food Technology, University of Zaragoza-IA2 (Zaragoza University-CITA), C/Miguel Servet 177, 50013 Zaragoza, Spain
| | - Sergio Sánchez
- Department of Plant Science, Agrifood Research and Technology Centre of Aragón (CITA). Avda. Montañana 930, 50059 Zaragoza, Spain
| | - Pedro Marco
- Department of Plant Science, Agrifood Research and Technology Centre of Aragón (CITA). Avda. Montañana 930, 50059 Zaragoza, Spain
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8
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Zhou LL, Shen WH, Ma YJ, Li XP, Wu JY, Wang JW. Structure characterization of an exopolysaccharide from a Shiraia-associated bacterium and its strong eliciting activity on the fungal hypocrellin production. Int J Biol Macromol 2023; 226:423-433. [PMID: 36473526 DOI: 10.1016/j.ijbiomac.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/07/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Hypocrellins are fungal perylenequinones (PQs) from Shiraia fruiting bodies and potential photosensitizers for cancer photodynamic therapy. Shiraia fruiting bodies harbor diverse bacterial communities dominated by Pseudomonas. The present study was to characterize the exopolysaccharide (EPS) of P. fulva SB1 which acted as an elicitor to stimulate the PQ accumulation of the host Shiraia. A bacterial EPS named EPS-1 was purified from the culture broth of P. fulva SB1, which consisted of mannose (Man) and glucose (Glc) with an average molecular weight of 9.213 × 104 Da. EPS-1 had (1 → 2)-linked α-mannopyranose (Manp) backbone and side chains of α-D-Manp-(1→ and α-D-Manp-(1 → 6)-β-D-Glcp-(1 → 6)-α-D-Manp(1 → group attached to the O-6 positions of (1 → 2)-α-D-Manp. EPS-1 at 30 mg/L stimulated both intracellular and extracellular hypocrellin A (HA) by about 3-fold of the control group. The EPS-1 treatment up-regulated the expression of key genes for HA biosynthesis. The elicitation of HA biosynthesis by EPS-1 was strongly dependent on the induced reactive oxygen species (ROS) generation. The results may provide new insights on the role of bacterial EPS in bacterium-fungus interactions and effective elicitation strategy for hypocrellin production in mycelial cultures.
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Affiliation(s)
- Lu Lu Zhou
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Wen Hao Shen
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Yan Jun Ma
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Jian-Yong Wu
- Research Institute for Future Food, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
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Ge W, Ren Y, Dong C, Shao Q, Bai Y, He Z, Yao T, Zhang Y, Zhu G, Deshmukh SK, Han Y. New perspective: Symbiotic pattern and assembly mechanism of Cantharellus cibarius-associated bacteria. Front Microbiol 2023; 14:1074468. [PMID: 36876069 PMCID: PMC9978014 DOI: 10.3389/fmicb.2023.1074468] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 01/30/2023] [Indexed: 02/18/2023] Open
Abstract
Cantharellus cibarius, an ectomycorrhizal fungus belonging to the Basidiomycetes, has significant medicinal and edible value, economic importance, and ecological benefits. However, C. cibarius remains incapable of artificial cultivation, which is thought to be due to the presence of bacteria. Therefore, much research has focused on the relationship between C. cibarius and bacteria, but rare bacteria are frequently overlooked, and symbiotic pattern and assembly mechanism of the bacterial community associated with C. cibarius remain unknown. In this study, the assembly mechanism and driving factors of both abundant and rare bacterial communities of C. cibarius were revealed by the null model. The symbiotic pattern of the bacterial community was examined using a co-occurrence network. Metabolic functions and phenotypes of the abundant and rare bacteria were compared using METAGENassist2, and the impacts of abiotic variables on the diversity of abundant and rare bacteria were examined using partial least squares path modeling. In the fruiting body and mycosphere of C. cibarius, there was a higher proportion of specialist bacteria compared with generalist bacteria. Dispersal limitation dominated the assembly of abundant and rare bacterial communities in the fruiting body and mycosphere. However, pH, 1-octen-3-ol, and total phosphorus of the fruiting body were the main driving factors of bacterial community assembly in the fruiting body, while available nitrogen and total phosphorus of the soil affected the assembly process of the bacterial community in the mycosphere. Furthermore, bacterial co-occurrence patterns in the mycosphere may be more complex compared with those in the fruiting body. Unlike the specific potential functions of abundant bacteria, rare bacteria may provide supplementary or unique metabolic pathways (such as sulfite oxidizer and sulfur reducer) to enhance the ecological function of C. cibarius. Notably, while volatile organic compounds can reduce mycosphere bacterial diversity, they can increase fruiting body bacterial diversity. Findings from this study further, our understanding of C. cibarius-associated microbial ecology.
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Affiliation(s)
- Wei Ge
- Institute of Fungus Resources, Department of Ecology/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, Guizhou, China
| | - Yulian Ren
- Institute of Fungus Resources, Department of Ecology/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, Guizhou, China
| | - Chunbo Dong
- Institute of Fungus Resources, Department of Ecology/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, Guizhou, China
| | - Qiuyu Shao
- Institute of Fungus Resources, Department of Ecology/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, Guizhou, China
| | - Yanmin Bai
- Institute of Fungus Resources, Department of Ecology/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, Guizhou, China
| | - Zhaoying He
- Institute of Fungus Resources, Department of Ecology/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, Guizhou, China
| | - Ting Yao
- Analysis and Test Center, Huangshan University, Huangshan, China
| | - Yanwei Zhang
- School of Biological Sciences, Guizhou Education University, Guiyang, Guizhou, China
| | - Guosheng Zhu
- Guizhou Key Laboratory of Edible Fungi Breeding, Institute of Crop Germplasm Resources, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, China
| | - Sunil Kumar Deshmukh
- TERI-Deakin Nano Biotechnology Centre, The Energy and Resources Institute, New Delhi, India
| | - Yanfeng Han
- Institute of Fungus Resources, Department of Ecology/Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering, Guizhou University, Guiyang, Guizhou, China
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10
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Monaco P, Naclerio G, Mello A, Bucci A. Role and potentialities of bacteria associated with Tuber magnatum: A mini-review. Front Microbiol 2022; 13:1017089. [PMID: 36274685 PMCID: PMC9584545 DOI: 10.3389/fmicb.2022.1017089] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/02/2022] [Indexed: 11/13/2022] Open
Abstract
Among the hypogeous ectomycorrhizal fungi, the white truffle Tuber magnatum Picco is the species of greatest interest, both from an ecological and economic point of view. The increasing market demand of the precious white truffle along with the fall in its natural production led to a growing interest in cultivation techniques and encouraged truffle growers and researchers to deeper investigate factors that could affect and improve T. magnatum productivity. In this context, microbial communities play a central role. Indeed, in the last few years, the hypothesis of a potential link between microbial community composition and truffle orchard productivity is arousing a greater attention. Moreover, since the value of the prized T. magnatum can vary in relation to its provenience, the need to define a reliable tracking system is also emerging and bacteria appear to be a promising tool. Accordingly, the present mini-review summarises the knowledge currently available on T. magnatum microbial communities, focusing on the role of truffle-associated bacteria and highlighting similarities and differences between samples of different origin, to address the following issues: (i) Is there a correlation between microbial taxa and truffle ground productivity? (ii) Can bacteria actually be used as markers of T. magnatum geographic origin? The identification of microorganisms able to promote T. magnatum formation may represent an important advance in the field of truffle farming. Similarly, the detection of bacterial taxa that can be used as markers of T. magnatum origin could have a considerable impact on truffle industry and trade, even at local scale.
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Affiliation(s)
- Pamela Monaco
- Department of Biosciences and Territory, University of Molise, Pesche, Italy
- *Correspondence: Pamela Monaco,
| | - Gino Naclerio
- Department of Biosciences and Territory, University of Molise, Pesche, Italy
| | - Antonietta Mello
- Institute for Sustainable Plant Protection (IPSP), Turin Unit, National Research Council, Turin, Italy
| | - Antonio Bucci
- Department of Biosciences and Territory, University of Molise, Pesche, Italy
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11
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Li Y, Li J, Qiao P, Zhou D, Xing Y, Chen J. Monitoring the volatile composition and change in different geographical regions and harvest time of Chinese truffle (Tuber indicum Cooke & Massee). Eur Food Res Technol 2022. [DOI: 10.1007/s00217-022-03994-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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12
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Phong WN, Gibberd MR, Payne AD, Dykes GA, Coorey R. Methods used for extraction of plant volatiles have potential to preserve truffle aroma: A review. Compr Rev Food Sci Food Saf 2022; 21:1677-1701. [PMID: 35179824 DOI: 10.1111/1541-4337.12927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 01/18/2022] [Accepted: 01/23/2022] [Indexed: 11/30/2022]
Abstract
Truffles are considered one of the world's most highly prized foods mainly due to their desirable organoleptic properties and rarity. However, truffles are seasonal (harvested mostly in winter from June to August in the Southern Hemisphere and from December to February in the Northern Hemisphere) and extremely perishable. Truffles deteriorate rapidly showing undesirable changes within 10 days from harvest in aroma and visual appearance after harvest. The very short postharvest shelf life (about 7-10 days) limits the potential for export and domestic consumption all year round. Several preservation methods have been studied to prolong their shelf life without the loss of aroma. However, all traditional preservation techniques have their own shortcomings and remain challenging. The extraction of natural truffle aroma volatiles for food applications could be a potential alternative to replace the existing synthetic flavoring used for processed truffle products. Four commonly used extraction methods for recovering volatile compounds from plants, namely, supercritical carbon dioxide extraction, Soxhlet extraction, distillation, and cold pressing, are critically analyzed. Up to date, existing research about the extraction of aroma volatiles from truffles is limited in the literature but based on the volatility of the key truffle volatile compounds, supercritical carbon dioxide extraction may offer the best possibility so that a natural truffle-based product that can be used in food applications throughout the year can be made available.
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Affiliation(s)
- Win Nee Phong
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
| | - Mark R Gibberd
- Centre for Crop and Disease Management School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
| | - Alan D Payne
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
| | - Gary A Dykes
- School of Agriculture and Food Sciences, University of Queensland, Saint Lucia, Queensland, Australia
| | - Ranil Coorey
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
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13
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Choo KSO, Bollen M, Dykes GA, Coorey R. Aroma‐volatile profile and its changes in Australian grown black Périgord truffle (
Tuber melanosporum
) during storage. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kenny S. O. Choo
- School of Public Health Curtin University Kent Street Bentley WA Australia
| | - Maike Bollen
- Metabolomics Australia, Centre for Microscopy, Characterisation and Analysis University of Western Australia Perth WA Australia
| | - Gary A. Dykes
- School of Agriculture and Food Sciences University of Queensland St. Lucia Qld 4067 Australia
| | - Ranil Coorey
- School of Molecular Life Sciences Curtin University Kent Street Bentley WA Australia
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14
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Niimi J, Deveau A, Splivallo R. Aroma and bacterial communities dramatically change with storage of fresh white truffle Tuber magnatum. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Monaco P, Bucci A, Naclerio G, Mello A. Heterogeneity of the white truffle Tuber magnatum in a limited geographic area of Central-Southern Italy. ENVIRONMENTAL MICROBIOLOGY REPORTS 2021; 13:591-599. [PMID: 33943006 DOI: 10.1111/1758-2229.12956] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 03/19/2021] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
Molise region (Central-Southern Italy) is one of the Italian richest areas of truffles and contributes significantly to the national production of the precious Tuber magnatum. Nevertheless, Molise truffle has received little scientific attention. Accordingly, in the present study, two T. magnatum populations collected in two different sites of Molise region were characterised from a morphological, genetic and microbiological point of view. A considerable variability between and within the two analysed groups emerged, suggesting an interesting heterogeneity of Molise white truffle populations. Ascocarps of the two groups significantly differed in size and maturation degree, although no linear correlation between weight and maturity was found. Genetic investigations focused on the Sequence-Characterised Amplified Region SCAR A21-inf. Three haplotypes, randomly distributed within the two truffle groups regardless of their collection sites, were detected. The 16S rRNA gene amplicon high-throughput sequencing provided an overview of the composition of the ascocarp-associated bacterial communities. A predominance of α-Proteobacteria was observed, with Bradyrhizobium among the main genera. However, some truffles showed unusual microbial profiles, with Pedobacter, Polaromonas and other bacterial genera as dominant taxa.
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Affiliation(s)
- Pamela Monaco
- Department of Biosciences and Territory, University of Molise, Contrada Fonte Lappone, Pesche (IS), 86090, Italy
| | - Antonio Bucci
- Department of Biosciences and Territory, University of Molise, Contrada Fonte Lappone, Pesche (IS), 86090, Italy
| | - Gino Naclerio
- Department of Biosciences and Territory, University of Molise, Contrada Fonte Lappone, Pesche (IS), 86090, Italy
| | - Antonietta Mello
- Institute for Sustainable Plant Protection (IPSP), Turin Unit, National Research Council, Viale P.A. Mattioli 25, Turin, 10125, Italy
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16
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Truffle Microbiome Is Driven by Fruit Body Compartmentalization Rather than Soils Conditioned by Different Host Trees. mSphere 2021; 6:e0003921. [PMID: 34378984 PMCID: PMC8386477 DOI: 10.1128/msphere.00039-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Truffles are among the most expensive edible mushrooms; their value is worth billions of U.S. dollars annually in international markets. They establish ectomycorrhizal symbiotic relationships with diverse host tree roots and produce hypogeous ascomata. Their whole life cycle is closely related to their associated microbiome. However, whether truffle-associated compartments or host tree rhizospheres are the vital driver for truffle ascomata microbiome is unclear. To identify and compare fungal and bacterial communities in four truffle-associated compartments (Tuber indicum: bulk soil, adhering soil to peridium, peridium, and gleba) from three host trees, we sequenced their ITS (fungal) and 16S (bacterial) ribosomal DNA using the Illumina MiSeq high-throughput platform. We further applied the amplicon data to analyze the core microbiome and microbial ecological networks. Tuber indicum microbiome composition was strongly driven by its associated compartments rather than by their symbiotic host trees. Truffle microbiome was bacteria dominated, and its bacterial community formed a substantially more complex interacting network compared to that of the fungal community. The core fungal community changed from Basidiomycota dominated (bulk soil) to Rozellomycota dominated (interphase soil); the core bacterial community shifted from Bacteroidetes to Proteobacteria dominance from truffle peridium to gleba tissue. Especially, at the truffle and soil interphase, the niche-based selection of truffle microbiome was verified by (i) a clear exclusion of four bacterial phyla (Rokubacteria, Nitrospirae, Chloroflexi, and Planctomycetes) in gleba; (ii) a significant decrease in alpha-diversity (as revealed by Chao 1, Shannon, and Simpson indices); and (iii) the complexity of the network substantially decreased from bulk soil to soil-truffle interphase and further to the peridium and gleba. The network analysis of microbiome showed that the microbial positive interactions were higher in truffle tissues than in both bulk soil and peridium-adhering soil and that Cupriavidus, Bradyrhizobium, Aminobacter, and Mesorhizobium spp. were the keystone network hubs in the truffle gleba. This study provides insights into the factors that drive the truffle microbiome dynamics and the recruitment and function of the microbiome components. IMPORTANCE Currently, the factors that drive the microbiome associated with truffles, the most highly prized fungi in the world, are largely unknown. We demonstrate for the first time here that truffle microbiome composition is strongly driven by associated compartments rather than by symbiotic host trees. The truffle microbiome was bacteria dominated, and its bacterial community formed a substantially more complex (with the higher numbers of nodes, links, and modules) interacting network compared to that of the fungal community. Network analysis showed a higher number of positive microbial interactions with each other in truffle tissues than in both bulk soil and peridium-adhering soil. For the first time, the fungal community structure associated with truffles using high-throughput sequencing, microbial networks, and keystone species analyses is presented. This study provides novel insights into the factors that drive the truffle microbiome dynamics and the recruitment and function of the microbiome components, showing that they are more complex than previously thought.
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17
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Differentiation between species and regional origin of fresh and freeze-dried truffles according to their volatile profiles. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107698] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Choo KSO, Bollen M, Ravensdale JT, Dykes GA, Coorey R. Effect of chitosan and gum Arabic with natamycin on the aroma profile and bacterial community of Australian grown black Périgord truffles (Tuber melansoporum) during storage. Food Microbiol 2021; 97:103743. [PMID: 33653522 DOI: 10.1016/j.fm.2021.103743] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 11/30/2022]
Abstract
This study aimed to assess the effect of chitosan or gum Arabic edible coatings, with natamycin (200, 300, 400 mg/L) on the aroma profiles of Western Australian grown truffles at five storage intervals: 0, 7, 14, 21, and 28 days using solid-phase microextraction (SPME)-followed by gas chromatography-mass spectrometry (GC-MS). The population structure of the bacterial community of both untreated and chitosan-natamycin (400 mg/L) coated truffles were assessed using metagenomic sequencing analysis alongside GC-MS. The results demonstrated that all the coating treatments were able to have a positive impact in halting or delaying the changes of truffle aroma throughout the storage period, with chitosan-natamycin (400 mg/L) coating having the best preservation results compared to the other coatings. Only 9 volatile organic compounds (VOCs) were found to have significant changes in chitosan-natamycin (400 mg/L) coated truffles throughout the storage period compared to 11 VOCs in untreated controls. The result also demonstrated the gradual change of fresh truffle's bacteria communities over the storage period. Over 4 weeks of storage, the dominant bacterial classes of the truffles (α-Proteobacteria, Bacteroidia or Actinobacteria classes) were replaced by Bacteroidia, Actinobacteria, Deltaprotobacteria and γ-Proteobacteria classes. The preliminary results from this study show that edible coatings can affect the VOC and bacterial communities of the truffles which may have implications for future research into truffle preservation techniques.
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Affiliation(s)
- Kenny S O Choo
- School of Molecular Life Sciences, Curtin University, Kent Street, Bentley, Western Australia, Australia
| | - Maike Bollen
- Metabolomics Australia, University of Western Australia, Stirling Hwy, Crawley, Western Australia, Australia
| | - Joshua T Ravensdale
- School of Public Health, Curtin University, Kent Street, Bentley, Western Australia, Australia
| | - Gary A Dykes
- Graduate Research School, Curtin University, Kent Street, Bentley, Western Australia, Australia
| | - Ranil Coorey
- School of Molecular Life Sciences, Curtin University, Kent Street, Bentley, Western Australia, Australia.
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19
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Mustafa AM, Angeloni S, Nzekoue FK, Abouelenein D, Sagratini G, Caprioli G, Torregiani E. An Overview on Truffle Aroma and Main Volatile Compounds. Molecules 2020; 25:molecules25245948. [PMID: 33334053 PMCID: PMC7765491 DOI: 10.3390/molecules25245948] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 12/14/2022] Open
Abstract
Truffles are underground edible fungi that grow symbiotically with plant roots. They have been globally considered as one of the most expensive foods because of their rarity, unique aroma, and high nutritional value as antioxidant, anti-inflammatory, antiviral, hepatoprotective, anti-mutagenic, antituberculoid immunomodulatory, antitumor, antimicrobial, and aphrodisiac. The unique flavor and fragrance of truffles is one of the main reasons to get worldwide attraction as a food product. So, the aim of this review was to summarize the relevant literature with particular attention to the active aroma components as well as the various sample preparation and analytical techniques used to identify them. The major analytical methods used for the determination of volatile organic compounds (VOC) in truffles are gas chromatography (GC), proton-transfer-reaction mass spectrometry (PTR-MS), and electronic nose sensing (EN). In addition, factors influencing truffle aroma are also highlighted. For this reason, this review can be considered a good reference for research concerning aroma profiles of different species of truffles to deepen the knowledge about a complex odor of various truffles.
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Affiliation(s)
- Ahmed M. Mustafa
- School of Pharmacy, University of Camerino, Via Sant’Agostino 1, 62032 Camerino, Italy; (A.M.M.); (S.A.); (F.K.N.); (D.A.); (G.S.); (G.C.)
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Simone Angeloni
- School of Pharmacy, University of Camerino, Via Sant’Agostino 1, 62032 Camerino, Italy; (A.M.M.); (S.A.); (F.K.N.); (D.A.); (G.S.); (G.C.)
| | - Franks Kamgang Nzekoue
- School of Pharmacy, University of Camerino, Via Sant’Agostino 1, 62032 Camerino, Italy; (A.M.M.); (S.A.); (F.K.N.); (D.A.); (G.S.); (G.C.)
| | - Doaa Abouelenein
- School of Pharmacy, University of Camerino, Via Sant’Agostino 1, 62032 Camerino, Italy; (A.M.M.); (S.A.); (F.K.N.); (D.A.); (G.S.); (G.C.)
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Gianni Sagratini
- School of Pharmacy, University of Camerino, Via Sant’Agostino 1, 62032 Camerino, Italy; (A.M.M.); (S.A.); (F.K.N.); (D.A.); (G.S.); (G.C.)
| | - Giovanni Caprioli
- School of Pharmacy, University of Camerino, Via Sant’Agostino 1, 62032 Camerino, Italy; (A.M.M.); (S.A.); (F.K.N.); (D.A.); (G.S.); (G.C.)
| | - Elisabetta Torregiani
- School of Pharmacy, University of Camerino, Via Sant’Agostino 1, 62032 Camerino, Italy; (A.M.M.); (S.A.); (F.K.N.); (D.A.); (G.S.); (G.C.)
- Correspondence:
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20
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Liu D, Herrera M, Yu F, Pèrez-Moreno J. Provenances originate morphological and microbiome variation of Tuber pseudobrumale in southwestern China despite strong genetic consistency. Mycol Prog 2020. [DOI: 10.1007/s11557-020-01645-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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21
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Hypobaric Packaging Prolongs the Shelf Life of Refrigerated Black Truffles ( Tuber melanosporum). Molecules 2020; 25:molecules25173837. [PMID: 32846927 PMCID: PMC7504210 DOI: 10.3390/molecules25173837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/09/2020] [Accepted: 08/21/2020] [Indexed: 11/17/2022] Open
Abstract
Black truffle (Tuber melanosporum Vitt.) is a fine agro-food product known for its unique aroma and very limited shelf life (maximum of 5-7 days, room temperature). Hypobaric packaging at 30 kPa, a mix of 1% O2/99% N2, and 40% CO2/60% N2 were studied to prolong the shelf life of black truffle at 4 °C in sealed polypropylene vessels, compared to normal atmosphere. Epiphytic microbial population, firmness, weight loss, CO2 formation, and sensory properties were monitored weekly up to 35 days of storage and were related to the volatile profile. Principal components analysis revealed good correlation between the storage time and the decrease of firmness, and the increase of the microbial count and CO2 production. Only truffles stored under hypobaric conditions showed an acceptable quality after 14 days storage. Hypobaric packaging is a cheap strategy to prevent the swelling of vessels caused by respiration and can reduce the deviation from the high-quality level of the fresh product from one to at least two weeks.
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22
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Effects of gamma irradiation on the shelf-life and bioactive compounds of Tuber aestivum truffles packaged in passive modified atmosphere. Int J Food Microbiol 2020; 332:108774. [PMID: 32634639 DOI: 10.1016/j.ijfoodmicro.2020.108774] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 06/21/2020] [Accepted: 06/28/2020] [Indexed: 02/02/2023]
Abstract
The effects of gamma irradiation (0.5, 1.0, 1.5 and 2.5 kGy doses) on Tuber aestivum packaged under modified atmosphere was evaluated. The respiration rate, microbial populations, sensory characteristics and content of bioactive compounds (total carbohydrates, chitins, β-glucans, proteins, total phenols and sterols) were monitored from immediately after treatment up to day 42 of storage at 4 °C. All the irradiation treatments tested reduced the microbial groups studied by more than 3 log cfu/g. Increasing irradiation doses slowed down the subsequent microbial development throughout the conservation period for all the groups studied. The irradiation treatments did not negatively affect truffle sensory characteristics. Only a slight visible superficial yeast growth was detected at the end of the shelf-life in all doses applied. Total carbohydrate content, chitins, β-glucans and proteins levels were not affected after irradiation. However, sterols, particularly stigmasterol, slightly decreased after irradiation, while levels of phenolic compounds doubled during storage. Gamma irradiation (2.5 kGy) could be used to extend the shelf-life of summer truffles packaged under modified atmosphere, since no remarkable reduction of bioactive compounds were noticed after 42 days of storage, and their sensory and microbial parameters were of higher quality than those of non-irradiated controls.
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23
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24
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Chen J, Li JM, Tang YJ, Xing YM, Qiao P, Li Y, Liu PG, Guo SX. Chinese Black Truffle-Associated Bacterial Communities of Tuber indicum From Different Geographical Regions With Nitrogen Fixing Bioactivity. Front Microbiol 2019; 10:2515. [PMID: 31749786 PMCID: PMC6848067 DOI: 10.3389/fmicb.2019.02515] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 10/18/2019] [Indexed: 11/13/2022] Open
Abstract
It is well known that the microbes associated with truffle fruiting bodies play a very important role during the truffle lifecycle. Tuber indicum, commonly called Chinese black truffle, is a species endemic to Eastern Asia and in the genus of Tuber. Here, we reported the bacterial communities of T. indicum from different geographical regions and described the bacterial diversity from three compartments (soil, ectomycorrhizae and ascocarps) of T. indicum using high-throughput sequencing combined tissue culture. The results revealed that Bradyrhizobium was the dominant genus in fruiting bodies of T. indicum from nine geographical sites in China, and the microbes in T. indicum ascocarps were influenced by geological locations and soil characteristics. More specific bacterial taxa were enriched in the fruiting bodies than in the ectomycorrhizae and soil. In addition, 60 cultural bacteria were isolated from T. indicum fruiting bodies (4 families, 24 genera), and Pseudomonas, Alcaligenes faecalis, Microbacterium, and Arthrobacter were dominant. One of 13 strains that have potential nitrogen-fixation activities was further verified by an acetylene reduction assay (ARA). Together, this research provides new and important data for better understanding of the interaction between truffle and associated microbe and the biology of truffle itself.
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Affiliation(s)
- Juan Chen
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Jia-Mei Li
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yan-Jing Tang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yong-Mei Xing
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Peng Qiao
- Shandong Institute of Sericulture, Shandong Academy of Agricultural Sciences, Yantai, China
| | - Yang Li
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Pei-Gui Liu
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Shun-Xing Guo
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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