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Angulo V, Bleichrodt RJ, Dijksterhuis J, Erktan A, Hefting MM, Kraak B, Kowalchuk GA. Enhancement of soil aggregation and physical properties through fungal amendments under varying moisture conditions. Environ Microbiol 2024; 26:e16627. [PMID: 38733112 DOI: 10.1111/1462-2920.16627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 04/05/2024] [Indexed: 05/13/2024]
Abstract
Soil structure and aggregation are crucial for soil functionality, particularly under drought conditions. Saprobic soil fungi, known for their resilience in low moisture conditions, are recognized for their influence on soil aggregate dynamics. In this study, we explored the potential of fungal amendments to enhance soil aggregation and hydrological properties across different moisture regimes. We used a selection of 29 fungal isolates, recovered from soils treated under drought conditions and varying in colony density and growth rate, for single-strain inoculation into sterilized soil microcosms under either low or high moisture (≤-0.96 and -0.03 MPa, respectively). After 8 weeks, we assessed soil aggregate formation and stability, along with soil properties such as soil water content, water hydrophobicity, sorptivity, total fungal biomass and water potential. Our findings indicate that fungal inoculation altered soil hydrological properties and improved soil aggregation, with effects varying based on the fungal strains and soil moisture levels. We found a positive correlation between fungal biomass and enhanced soil aggregate formation and stabilization, achieved by connecting soil particles via hyphae and modifying soil aggregate sorptivity. The improvement in soil water potential was observed only when the initial moisture level was not critical for fungal activity. Overall, our results highlight the potential of using fungal inoculation to improve the structure of agricultural soil under drought conditions, thereby introducing new possibilities for soil management in the context of climate change.
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Affiliation(s)
- Violeta Angulo
- Ecology and Biodiversity Group, Institute of Environmental Biology, Utrecht University, Utrecht, the Netherlands
| | - Robert-Jan Bleichrodt
- Microbiology Group, Institute of Environmental Biology, Utrecht University, Utrecht, the Netherlands
| | - Jan Dijksterhuis
- Food and Indoor Mycology, Westerdijk Fungal Biodiversity Institute, Utrecht, the Netherlands
| | - Amandine Erktan
- Eco&Sols, University Montpellier, IRD, INRAe, CIRAD, Montpellier SupAgro, Montpellier, France
- Johann-Friedrich-Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Mariet M Hefting
- Ecology and Biodiversity Group, Institute of Environmental Biology, Utrecht University, Utrecht, the Netherlands
- Amsterdam Institute for Life and Environment (A-LIFE), Systems Ecology Section, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Bart Kraak
- Food and Indoor Mycology, Westerdijk Fungal Biodiversity Institute, Utrecht, the Netherlands
| | - George A Kowalchuk
- Ecology and Biodiversity Group, Institute of Environmental Biology, Utrecht University, Utrecht, the Netherlands
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Algotiml R, Gab-Alla A, Seoudi R, Abulreesh HH, El-Readi MZ, Elbanna K. Anticancer and antimicrobial activity of biosynthesized Red Sea marine algal silver nanoparticles. Sci Rep 2022; 12:2421. [PMID: 35165346 PMCID: PMC8844081 DOI: 10.1038/s41598-022-06412-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 01/24/2022] [Indexed: 12/24/2022] Open
Abstract
Biosynthesis of silver nanoparticles (AgNPs) is emerging as a simple and eco-friendly alternative to conventional chemical synthesis methods. The role of AgNPs is expanding as antimicrobial and anticancer agents, sensors, nanoelectronic devices, and imaging contrast agents. In this study, biogenic AgNPs were synthesized using extracts of different marine algae species, including Ulva rigida (green alga), Cystoseira myrica (brown alga), and Gracilaria foliifera (red alga), as reducing and capping agents. The Physiochemical properties, cytotoxicity, anticancer and antimicrobial activities of the biosynthesized AgNPs were assessed. Surface plasmonic bands of the biosynthesized AgNPs capped with U. rigida, C. myrica, and G. foliifera extracts were visually observed to determine a colour change, and their peaks were observed at 424 nm, 409 nm, and 415 nm, respectively, by UV-Vis spectroscopy; transmission electron microscopy (TEM) indicated an almost spherical shape of AgNPs with nanoscale sizes of 12 nm, 17 nm, and 24 nm, respectively. Fourier transform-infrared (FTIR) spectroscopy analysis suggested that different molecules attached to AgNPs through OH, C=O, and amide groups. The major constituents of the aqueous algal extracts included, terpenoids, polyphenols, sulfonates, polysaccharides, fatty acids, chlorophylls, amide proteins, flavonoids, carotenoids, aliphatic fluoro compounds, volatile compounds, alkalines, pyruvic acid and agar groups. The cytotoxicity and anticancer activities of the biosynthesized AgNPs were assessed using Artemia salina nauplii, normal skin cell lines (HFb-4), and breast cancer cell lines (MCF-7 cell line). The lethality was found to be directly proportional to the AgNP concentration. The IC50 values of C. myrica and G. foliifera AgNPs against A. saline nauplii were 5 and 10 μg ml-1 after 4 h and 16 h, respectively, whereas U. rigida AgNPs did not exhibit cytotoxic effects. Anticancer activity of the biosynthesized AgNPs was dose dependent. The IC50 values of the biosynthesized AgNPs were 13, 13, and 43 µg ml-1 for U. rigida, C. myrica, and G. foliifera, respectively. U. rigida AgNPs particularly exhibited potent anticancer activity (92.62%) against a human breast adenocarcinoma cell line (MCF-7) with high selectivity compared the normal cells (IC50 = 13 µg/ml, SI = 3.2), followed by C. myrica AgNPs (IC50 = 13 µg/ml, SI = 3.07). Furthermore, the biosynthesized AgNPs exhibited strong antifungal activity against dermatophyte pathogenic moulds and mild antibacterial activity against the food borne pathogen bacteria. The highest antimicrobial activity was recorded for the U. rigida AgNPs, followed by those capped with C. myrica and G. foliifera extracts, respectively. AgNPs capped with the U. rigida extract exhibited the highest antimicrobial activity against Trichophyton mantigrophytes (40 mm), followed by Trichosporon cataneum (30 mm) and E. coli (19 mm), with minimal lethal concentration of 32 and 64 μg ml-1 respectively. The study finally revealed that extracts of marine algal species, particularly U. rigida extracts, could be effectively used as reducing agents for the green synthesis of AgNPs. These AgNPs are considered efficient alternative antidermatophytes for skin infections and anticancer agents against the MCF-7 cell line.
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Affiliation(s)
- Rabaa Algotiml
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
- Research Laboratories Unit, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Ali Gab-Alla
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
- Department of Marine Science, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | - Roshdi Seoudi
- Spectroscopy Department, Physics Division, National Research Center, Dokki, Cairo, 12622, Egypt
| | - Hussein H Abulreesh
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
- Research Laboratories Unit, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Mahmoud Zaki El-Readi
- Department of Clinical Biochemistry, Faculty of Medicine, Umm Al-Qura University, Makkah, 21955, Saudi Arabia
- Department of Biochemistry, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt
| | - Khaled Elbanna
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia.
- Research Laboratories Unit, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia.
- Department of Agricultural Microbiology, Faculty of Agriculture, Fayoum University, Fayoum, 63514, Egypt.
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Dopazo V, Luz C, Quiles JM, Calpe J, Romano R, Mañes J, Meca G. Potential application of lactic acid bacteria in the biopreservation of red grape from mycotoxigenic fungi. J Sci Food Agric 2022; 102:898-907. [PMID: 34240436 DOI: 10.1002/jsfa.11422] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/14/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Filamentous fungi are the main contamination agent in the viticultural sector. Use of synthetic fungicides is the regular answer to these contaminations. Nevertheless, because of several problems associated with the use of synthetic compounds, the industry demands new and safer methods. In the present work, the biopreservation potential of four lactic acid bacteria (LAB) strains was studied against the principal grape contaminant fungi. RESULTS Agar diffusion test evidenced that all four culture-free supernatant (CFS) had antifungal properties against all tested fungi. The minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) test values evidenced that media fermented by the Lactobacillus plantarum E3 and Lactobacillus plantarum E4 strains showed the highest antifungal activity, resulting in an MFC from 6.3 to 100 g L-1 . Analysis of CFS evidenced the presence of different antifungal compounds, such as lactic acid, phenyllactic acid and pyrazines. In tests on red grapes, an average reduction of 1.32 log10 of the spores per gram of fruit was achieved by all CFS in grapes inoculated with Aspergillus ochraceus and by 0.94 log10 for L. plantarum E3 CFS against Botrytis cinerea. CONCLUSION The antifungal activity of the fermented CFS by L. plantarum E3 reduced the growth of B. cinerea and A. ochraceus in grapes, which are the main contaminant and main producer of ochratoxin A in these crops, respectively. Therefore, based on the results obtained in this work, use of the strain L. plantarum E3 could be an interesting option for the biopreservation of grapes. © 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Victor Dopazo
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
| | - Carlos Luz
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
| | - Juan M Quiles
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
| | - Jorge Calpe
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
| | - Raffaele Romano
- Department of Agriculture, University of Napoli Federico II, Portici, Italy
| | - Jordi Mañes
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
| | - Giuseppe Meca
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
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Badr AN, El-Attar MM, Ali HS, Elkhadragy MF, Yehia HM, Farouk A. Spent Coffee Grounds Valorization as Bioactive Phenolic Source Acquired Antifungal, Anti-Mycotoxigenic, and Anti-Cytotoxic Activities. Toxins (Basel) 2022; 14:toxins14020109. [PMID: 35202136 PMCID: PMC8876227 DOI: 10.3390/toxins14020109] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 02/06/2023] Open
Abstract
Spent coffee grounds (SCGs), which constitute 75% of original coffee beans, represent an integral part of sustainability. Contamination by toxigenic fungi and their mycotoxins is a hazard that threatens food production. This investigation aimed to examine SCGs extract as antimycotic and anti-ochratoxigenic material. The SCGs were extracted in an eco-friendly way using isopropanol. Bioactive molecules of the extract were determined using the UPLC apparatus. The cytotoxicity on liver cancer cells (Hep-G2) showed moderate activity with selectivity compared with human healthy oral epithelial (OEC) cell lines but still lower than the positive control (Cisplatin). The antibacterial properties were examined against pathogenic strains, and the antifungal was examined against toxigenic fungi using two diffusion assays. Extract potency was investigated by two simulated models, a liquid medium and a food model. The results of the extract showed 15 phenolic acids and 8 flavonoids. Rosmarinic and syringic acids were the most abundant phenolic acids, while apigenin-7-glucoside, naringin, epicatechin, and catechin were the predominant flavonoids in the SCGs extract. The results reflected the degradation efficiency of the extract against the growth of Aspergillus strains. The SCGs recorded detoxification in liquid media for aflatoxins (AFs) and ochratoxin A (OCA). The incubation time of the extract within dough spiked with OCA was affected up to 2 h, where cooking was not affected. Therefore, SCGs in food products could be applied to reduce the mycotoxin contamination of raw materials to the acceptable regulated limits.
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Affiliation(s)
- Ahmed Noah Badr
- Food Toxicology and Contaminants Department, National Research Centre, Cairo 12622, Egypt
- Correspondence: (A.N.B.); (H.S.A.); Tel.: +20-1000327640 (H.S.A.)
| | - Marwa M. El-Attar
- Radioisotopes Department, Nuclear Research Center, Atomic Energy Authority, Cairo 11787, Egypt;
| | - Hatem S. Ali
- Food Technology Department, National Research Center, Cairo 12622, Egypt
- Correspondence: (A.N.B.); (H.S.A.); Tel.: +20-1000327640 (H.S.A.)
| | - Manal F. Elkhadragy
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Hany M. Yehia
- Food Science and Nutrition Department, College of Food and Agriculture Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia;
- Food Science and Nutrition Department, Faculty of Home Economics, Helwan University, Cairo 11221, Egypt
| | - Amr Farouk
- Flavour and Aroma Chemistry Department, National Research Centre, Cairo 12622, Egypt;
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Mofini MT, Diedhiou AG, Simonin M, Dondjou DT, Pignoly S, Ndiaye C, Min D, Vigouroux Y, Laplaze L, Kane A. Cultivated and wild pearl millet display contrasting patterns of abundance and co-occurrence in their root mycobiome. Sci Rep 2022; 12:207. [PMID: 34997057 PMCID: PMC8741948 DOI: 10.1038/s41598-021-04097-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 12/15/2021] [Indexed: 11/08/2022] Open
Abstract
Fungal communities associated with roots play a key role in nutrient uptake and in mitigating the abiotic and biotic stress of their host. In this study, we characterized the roots mycobiome of wild and cultivated pearl millet [Pennisetum glaucum (L.) R. Br., synonym: Cenchrus americanus (L.) Morrone] in three agro-ecological areas of Senegal following a rainfall gradient. We hypothesized that wild pearl millet could serve as a reservoir of endophytes for cultivated pearl millet. We therefore analyzed the soil factors influencing fungal community structure and whether cultivated and wild millet shared the same fungal communities. The fungal communities associated with pearl millet were significantly structured according to sites and plant type (wild vs cultivated). Besides, soil pH and phosphorus were the main factors influencing the fungal community structure. We observed a higher fungal diversity in cultivated compared to wild pearl millet. Interestingly, we detected higher relative abundance of putative pathotrophs, especially plant pathogen, in cultivated than in wild millet in semi-arid and semi-humid zones, and higher relative abundance of saprotrophs in wild millet in arid and semi-humid zones. A network analysis based on taxa co-occurrence patterns in the core mycobiome revealed that cultivated millet and wild relatives had dissimilar groups of hub taxa. The identification of the core mycobiome and hub taxa of cultivated and wild pearl millet could be an important step in developing microbiome engineering approaches for more sustainable management practices in pearl millet agroecosystems.
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Affiliation(s)
- Marie-Thérèse Mofini
- Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), BP 5005, Dakar Fann, Senegal
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Sénégal
- Laboratoire Commun de Microbiologie (LCM), Centre de Recherche de Bel-Air, Dakar, Sénégal
- Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Sénégal
- Centre d'Etude Régional pour l'Amélioration de l'Adaptation à la Sécheresse (CERAAS), Institut Sénégalais de Recherches Agricoles (ISRA), Route de Khombole, Thiès, Sénégal
| | - Abdala G Diedhiou
- Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), BP 5005, Dakar Fann, Senegal.
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Sénégal.
- Laboratoire Commun de Microbiologie (LCM), Centre de Recherche de Bel-Air, Dakar, Sénégal.
- Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Sénégal.
| | - Marie Simonin
- IPME, IRD, Cirad, Université de Montpellier, Montpellier, France
- Université d'Angers, Institut Agro, INRAE, IRHS, SFR 4207 QuaSaV, 49000, Angers, France
| | - Donald Tchouomo Dondjou
- Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), BP 5005, Dakar Fann, Senegal
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Sénégal
- Laboratoire Commun de Microbiologie (LCM), Centre de Recherche de Bel-Air, Dakar, Sénégal
- Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Sénégal
- Centre d'Etude Régional pour l'Amélioration de l'Adaptation à la Sécheresse (CERAAS), Institut Sénégalais de Recherches Agricoles (ISRA), Route de Khombole, Thiès, Sénégal
| | - Sarah Pignoly
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Sénégal
- Laboratoire Commun de Microbiologie (LCM), Centre de Recherche de Bel-Air, Dakar, Sénégal
- DIADE, Université de Montpellier, IRD, Cirad, 911 Avenue Agropolis, 34394, Montpellier cedex 5, France
| | - Cheikh Ndiaye
- Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), BP 5005, Dakar Fann, Senegal
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Sénégal
- Laboratoire Commun de Microbiologie (LCM), Centre de Recherche de Bel-Air, Dakar, Sénégal
- Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Sénégal
| | - Doohong Min
- Department of Agronomy, Kansas State University, Manhattan, KS, USA
| | - Yves Vigouroux
- DIADE, Université de Montpellier, IRD, Cirad, 911 Avenue Agropolis, 34394, Montpellier cedex 5, France
| | - Laurent Laplaze
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Sénégal.
- Laboratoire Commun de Microbiologie (LCM), Centre de Recherche de Bel-Air, Dakar, Sénégal.
- Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Sénégal.
- DIADE, Université de Montpellier, IRD, Cirad, 911 Avenue Agropolis, 34394, Montpellier cedex 5, France.
| | - Aboubacry Kane
- Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), BP 5005, Dakar Fann, Senegal.
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes associés aux Stress Environnementaux (LAPSE), Centre de recherche de Bel-Air, Dakar, Sénégal.
- Laboratoire Commun de Microbiologie (LCM), Centre de Recherche de Bel-Air, Dakar, Sénégal.
- Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Sénégal.
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Rizwana H, Bokahri NA, S. Alkhattaf F, Albasher G, A. Aldehaish H. Antifungal, Antibacterial, and Cytotoxic Activities of Silver Nanoparticles Synthesized from Aqueous Extracts of Mace-Arils of Myristica fragrans. Molecules 2021; 26:7709. [PMID: 34946791 PMCID: PMC8705175 DOI: 10.3390/molecules26247709] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/10/2021] [Accepted: 12/17/2021] [Indexed: 01/09/2023] Open
Abstract
In the present study, mace-mediated silver nanoparticles (mace-AgNPs) were synthesized, characterized, and evaluated against an array of pathogenic microorganisms. Mace, the arils of Myristica fragrans, are a rich source of several bioactive compounds, including polyphenols and aromatic compounds. During nano synthesis, the bioactive compounds in mace aqueous extracts serve as excellent bio reductants, stabilizers, and capping agents. The UV-VIS spectroscopy of the synthesized NPs showed an intense and broad SPR absorption peak at 456 nm. Dynamic light scattering (DLS) analysis showed the size with a Z average of 50 nm, while transmission electron microscopy (TEM) studies depicted the round shape and small size of the NPs, which ranged between 5-28 nm. The peaks related to important functional groups, such as phenols, alcohols, carbonyl groups, amides, alkanes and alkenes, were obtained on a Fourier-transform infrared spectroscopy (FTIR) spectrum. The peak at 3 keV on the energy dispersive X-ray spectrum (EDX) validated the presence of silver (Ag). Mace-silver nanoparticles exhibited potent antifungal and antibacterial activity against several pathogenic microorganisms. Additionally, the synthesized mace-AgNPs displayed an excellent cytotoxic effect against the human cervical cancer cell line. The mace-AgNPs demonstrated robust antibacterial, antifungal, and cytotoxic activity, indicating that the mace-AgNPs might be used in the agrochemical industry, pharmaceutical industry, and biomedical applications. However, future studies to understand its mode of action are needed.
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Affiliation(s)
- Humaira Rizwana
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (N.A.B.); (F.S.A.); (H.A.A.)
| | - Najat A. Bokahri
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (N.A.B.); (F.S.A.); (H.A.A.)
| | - Fatimah S. Alkhattaf
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (N.A.B.); (F.S.A.); (H.A.A.)
| | - Gadah Albasher
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Horiah A. Aldehaish
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia; (N.A.B.); (F.S.A.); (H.A.A.)
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Da Silva J, Leal EC, Carvalho E. Bioactive Antimicrobial Peptides as Therapeutic Agents for Infected Diabetic Foot Ulcers. Biomolecules 2021; 11:biom11121894. [PMID: 34944538 PMCID: PMC8699205 DOI: 10.3390/biom11121894] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/10/2021] [Accepted: 12/14/2021] [Indexed: 02/06/2023] Open
Abstract
Diabetic foot ulcer (DFU) is a devastating complication, affecting around 15% of diabetic patients and representing a leading cause of non-traumatic amputations. Notably, the risk of mixed bacterial–fungal infection is elevated and highly associated with wound necrosis and poor clinical outcomes. However, it is often underestimated in the literature. Therefore, polymicrobial infection control must be considered for effective management of DFU. It is noteworthy that antimicrobial resistance is constantly rising overtime, therefore increasing the need for new alternatives to antibiotics and antifungals. Antimicrobial peptides (AMPs) are endogenous peptides that are naturally abundant in several organisms, such as bacteria, amphibians and mammals, particularly in the skin. These molecules have shown broad-spectrum antimicrobial activity and some of them even have wound-healing activity, establishing themselves as ideal candidates for treating multi-kingdom infected wounds. Furthermore, the role of AMPs with antifungal activity in wound management is poorly described and deserves further investigation in association with antibacterial agents, such as antibiotics and AMPs with antibacterial activity, or alternatively the application of broad-spectrum antimicrobial agents that target both aerobic and anaerobic bacteria, as well as fungi. Accordingly, the aim of this review is to unravel the molecular mechanisms by which AMPs achieve their dual antimicrobial and wound-healing properties, and to discuss how these are currently being applied as promising therapies against polymicrobial-infected chronic wounds such as DFUs.
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Affiliation(s)
- Jessica Da Silva
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal;
- PhD Programme in Experimental Biology and Biomedicine, University of Coimbra, 3004-504 Coimbra, Portugal
- Institute of Interdisciplinary Research, University of Coimbra, Casa Costa Alemão, Rua Dom Francisco de Lemos, 3030-789 Coimbra, Portugal
| | - Ermelindo C. Leal
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal;
- Institute of Interdisciplinary Research, University of Coimbra, Casa Costa Alemão, Rua Dom Francisco de Lemos, 3030-789 Coimbra, Portugal
- Correspondence: (E.C.L.); (E.C.)
| | - Eugénia Carvalho
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal;
- Institute of Interdisciplinary Research, University of Coimbra, Casa Costa Alemão, Rua Dom Francisco de Lemos, 3030-789 Coimbra, Portugal
- Correspondence: (E.C.L.); (E.C.)
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Serratì S, Palazzo A, Lapenna A, Mateos H, Mallardi A, Marsano RM, Quarta A, Del Rosso M, Azzariti A. Salting-Out Approach Is Worthy of Comparison with Ultracentrifugation for Extracellular Vesicle Isolation from Tumor and Healthy Models. Biomolecules 2021; 11:biom11121857. [PMID: 34944501 PMCID: PMC8699204 DOI: 10.3390/biom11121857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/29/2021] [Accepted: 12/08/2021] [Indexed: 11/20/2022] Open
Abstract
The role of extracellular vesicles (EVs) has been completely re-evaluated in the recent decades, and EVs are currently considered to be among the main players in intercellular communication. Beyond their functional aspects, there is strong interest in the development of faster and less expensive isolation protocols that are as reliable for post-isolation characterisations as already-established methods. Therefore, the identification of easy and accessible EV isolation techniques with a low price/performance ratio is of paramount importance. We isolated EVs from a wide spectrum of samples of biological and clinical interest by choosing two isolation techniques, based on their wide use and affordability: ultracentrifugation and salting-out. We collected EVs from human cancer and healthy cell culture media, yeast, bacteria and Drosophila culture media and human fluids (plasma, urine and saliva). The size distribution and concentration of EVs were measured by nanoparticle tracking analysis and dynamic light scattering, and protein depletion was measured by a colorimetric nanoplasmonic assay. Finally, the EVs were characterised by flow cytometry. Our results showed that the salting-out method had a good efficiency in EV separation and was more efficient in protein depletion than ultracentrifugation. Thus, salting-out may represent a good alternative to ultracentrifugation.
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Affiliation(s)
- Simona Serratì
- Nanotecnology Laboratory, IRCCS Istituto Tumori Giovanni Paolo II, Viale Orazio Flacco 65, 70124 Bari, Italy;
- Correspondence: (S.S.); (A.P.)
| | - Antonio Palazzo
- Nanotecnology Laboratory, IRCCS Istituto Tumori Giovanni Paolo II, Viale Orazio Flacco 65, 70124 Bari, Italy;
- Correspondence: (S.S.); (A.P.)
| | - Annamaria Lapenna
- Department of Chemistry, University of Bari and CSGI (Center for Colloid and Surface Science), Via Orabona 4, 70125 Bari, Italy; (A.L.); (H.M.)
| | - Helena Mateos
- Department of Chemistry, University of Bari and CSGI (Center for Colloid and Surface Science), Via Orabona 4, 70125 Bari, Italy; (A.L.); (H.M.)
| | - Antonia Mallardi
- Istituto per i Processi Chimico Fisici, National Research Council (IPCF-CNR), c/o ChemistryDepartment, Via Orabona 4, 70125 Bari, Italy;
| | | | - Alessandra Quarta
- CNR NANOTEC—Istituto di Nanotecnologia, National Research Council (CNR), Via Monteroni, 73100 Lecce, Italy;
| | - Mario Del Rosso
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Viale G.B. Morgagni 50, 50134 Florence, Italy;
| | - Amalia Azzariti
- Nanotecnology Laboratory, IRCCS Istituto Tumori Giovanni Paolo II, Viale Orazio Flacco 65, 70124 Bari, Italy;
- Laboratory of Experimental Pharmacology, IRCCS Istituto Tumori Giovanni Paolo II, Viale Orazio Flacco 65, 70124 Bari, Italy
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9
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Paluch E, Okińczyc P, Zwyrzykowska-Wodzińska A, Szperlik J, Żarowska B, Duda-Madej A, Bąbelewski P, Włodarczyk M, Wojtasik W, Kupczyński R, Szumny A. Composition and Antimicrobial Activity of Ilex Leaves Water Extracts. Molecules 2021; 26:molecules26247442. [PMID: 34946528 PMCID: PMC8707412 DOI: 10.3390/molecules26247442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/02/2021] [Accepted: 12/05/2021] [Indexed: 11/16/2022] Open
Abstract
Plants from the Ilex genus are known for properties such as antimicrobial and anti-inflammatory activity, can act as antiobesity agents and thus can be helpful in medicine. Some holly species, such as Ilex paraguariensis (widely known in the form of popular beverage: yerba mate), have been investigated, while others have been partially researched or remain unknown. Therefore, we performed qualitative and quantitative phytochemical analyses and screened antimicrobial properties of lesser-studied species (I. aquifolium L., I. aquifolium ‘Argentea Marginata’ and I. × meserveae ‘Blue Angel’). I. paraguariensis was used as a standard species for comparison purposes. Investigations were performed on water extracts due to their expected activity and composition. Antimicrobial research included evaluating minimal inhibitory, bactericidal (Staphylococcus aureus and Escherichia coli) and fungicidal concentration (Candida albicans, Alternaria alternata, Fusarium oxysporum, and Aspergillus niger) of extracts. The influence of the extracts on the production, eradication, and viability of bacterial biofilms was also analysed. It was established that Ilex paraguariensis possesses the richest profile of hydroxycinnamic acids derivatives in terms of component concentration and diversity. Ilex spp., especially I. × meserveae, contain a slightly higher amount of flavonoids and more different flavonoid derivatives than I. paraguariensis. However, the strongest antibacterial activity was shown by I. aquifolium L. and its cultivar ‘Argentea Marginata’ in terms of minimal inhibitory, bactericidal and fungicidal concentration, and biofilm assays. Extracts from both species significantly reduced the biofilm viability of S. aureus as well, which may be of use in the production of multicomponent lavaseptics, antiseptics, diuretics (supporting urinary tract infection therapy) and, due to their action on fungi, additives to growth media for specific fungi. The significant content of saponins enables Ilex extracts to be used as natural emulsifiers, for example, in cosmetics. Moreover, relatively high chlorogenic acid and rutin content may suggest use of Ilex spp. to treat obesity, digestive problems, in chemoprevention, and as preservatives in the food industry.
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Affiliation(s)
- Emil Paluch
- Department of Microbiology, Faculty of Medicine, Wroclaw Medical University, Chałubińskiego 4, 50-376 Wrocław, Poland; (E.P.); (A.D.-M.)
| | - Piotr Okińczyc
- Department of Pharmacognosy and Herbal Medicines, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland;
- Correspondence: (P.O.); (P.B.); Tel.: +48-71-784-02-16 (P.O.)
| | - Anna Zwyrzykowska-Wodzińska
- Department of Environment Hygiene and Animal Welfare, Wrocław University of Environmental and Life Sciences, Chełmońskiego 38C, 51-630 Wrocław, Poland; (A.Z.-W.); (R.K.)
| | - Jakub Szperlik
- Laboratory of Tissue Culture, Botanical Garden, Faculty of Biological Sciences, University of Wrocław, Sienkiewicza 23, 50-525 Wrocław, Poland;
| | - Barbara Żarowska
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland;
| | - Anna Duda-Madej
- Department of Microbiology, Faculty of Medicine, Wroclaw Medical University, Chałubińskiego 4, 50-376 Wrocław, Poland; (E.P.); (A.D.-M.)
| | - Przemysław Bąbelewski
- Department of Horticulture, Wrocław University of Environmental and Life Sciences, Grunwaldzki 24A, 50-375 Wrocław, Poland
- Correspondence: (P.O.); (P.B.); Tel.: +48-71-784-02-16 (P.O.)
| | - Maciej Włodarczyk
- Department of Pharmacognosy and Herbal Medicines, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland;
| | - Wioleta Wojtasik
- Faculty of Biotechnology, University of Wrocław, Przybyszewskiego 63/77, 51-148 Wrocław, Poland;
| | - Robert Kupczyński
- Department of Environment Hygiene and Animal Welfare, Wrocław University of Environmental and Life Sciences, Chełmońskiego 38C, 51-630 Wrocław, Poland; (A.Z.-W.); (R.K.)
| | - Antoni Szumny
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
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10
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Sheikh M, Mehnaz S, Sadiq MB. Prevalence of fungi in fresh tomatoes and their control by chitosan and sweet orange (Citrus sinensis) peel essential oil coating. J Sci Food Agric 2021; 101:6248-6257. [PMID: 33937995 DOI: 10.1002/jsfa.11291] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/23/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Fungal contamination is a major cause of food spoilage. There is an urgent need to find and characterize natural preservatives. This study evaluates the prevalence of fungi in tomatoes and their control by using essential oil (EO) from sweet orange peel. Essential oils were extracted from dried and fresh sweet orange peels by using n-hexane and ethanol as extraction solvents. Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometry (GC-MS) analyses were performed to identify the chemical composition of the EO. A combination of chitosan (CS) and EO was used to control the fungal decay of tomatoes inoculated with Aspergillus niger and Penicillium citrinum. RESULTS Tomatoes obtained from local markets and supermarkets showed a high prevalence of Aspergillus and Penicillium spp. Essential oils extracted by ethanol from dried peels showed complete inhibition of A. niger and P. citrinum and hyphal degradation at a minimum inhibitory concentration (MIC) of 100 μL mL-1 . The combination of EO with chitosan (2%) as a coating, effectively controlled the fungal decay of tomatoes until the eighth day of storage at 25 °C. CONCLUSION Due to their edible nature, and their antifungal and preservative potential, EO- and CS-based coatings can be used to extend the shelf life of tomatoes and other agriculture commodities. Essential oil- and CS-based coating can be used as alternative to synthetic preservatives, which are associated with various health hazards. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Mehrunisa Sheikh
- School of Life Sciences, Forman Christian College (A Chartered University), Lahore, Pakistan
| | - Samina Mehnaz
- School of Life Sciences, Forman Christian College (A Chartered University), Lahore, Pakistan
| | - Muhammad Bilal Sadiq
- School of Life Sciences, Forman Christian College (A Chartered University), Lahore, Pakistan
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11
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Qiu M, Wang Y, Sun L, Deng Q, Zhao J. Fatty Acids and Oxylipins as Antifungal and Anti-Mycotoxin Agents in Food: A Review. Toxins (Basel) 2021; 13:toxins13120852. [PMID: 34941690 PMCID: PMC8707646 DOI: 10.3390/toxins13120852] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/12/2021] [Accepted: 11/22/2021] [Indexed: 01/22/2023] Open
Abstract
Fungal contamination of food, especially by mycotoxigenic fungi, not only reduces the quality of the food, but can also cause serious diseases, thus posing a major food safety challenge to humans. Apart from sound food control systems, there is also a continual need to explore antifungal agents that can inhibit fungal growth and mycotoxin production in food. Many types of fatty acids (FAs) and their oxidized derivatives, oxylipins, have been found to exhibit such effects. In this review, we provide an update on the most recent literature on the occurrence and formation of FAs and oxylipins in food, their effects on fungal growth and mycotoxin synthesis, as well as the genetic and molecular mechanisms of actions. Research gaps in the field and needs for further studies in order to realizing the potential of FAs and oxylipins as natural antifungal preservatives in food are also discussed.
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Affiliation(s)
- Mei Qiu
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (M.Q.); (L.S.); (Q.D.)
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang 524088, China
- Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Marine Food, Zhanjiang 524088, China
| | - Yaling Wang
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (M.Q.); (L.S.); (Q.D.)
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang 524088, China
- Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Marine Food, Zhanjiang 524088, China
- Correspondence:
| | - Lijun Sun
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (M.Q.); (L.S.); (Q.D.)
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang 524088, China
- Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Marine Food, Zhanjiang 524088, China
| | - Qi Deng
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (M.Q.); (L.S.); (Q.D.)
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Zhanjiang 524088, China
- Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Marine Food, Zhanjiang 524088, China
| | - Jian Zhao
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia;
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12
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Corbu VM, Gheorghe I, Marinaș IC, Geană EI, Moza MI, Csutak O, Chifiriuc MC. Demonstration of Allium sativum Extract Inhibitory Effect on Biodeteriogenic Microbial Strain Growth, Biofilm Development, and Enzymatic and Organic Acid Production. Molecules 2021; 26:molecules26237195. [PMID: 34885775 PMCID: PMC8659052 DOI: 10.3390/molecules26237195] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/24/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022] Open
Abstract
To the best of our knowledge, this is the first study demonstrating the efficiency of Allium sativum hydro-alcoholic extract (ASE) againstFigure growth, biofilm development, and soluble factor production of more than 200 biodeteriogenic microbial strains isolated from cultural heritage objects and buildings. The plant extract composition and antioxidant activities were determined spectrophotometrically and by HPLC-MS. The bioevaluation consisted of the qualitative (adapted diffusion method) and the quantitative evaluation of the inhibitory effect on planktonic growth (microdilution method), biofilm formation (violet crystal microtiter method), and production of microbial enzymes and organic acids. The garlic extract efficiency was correlated with microbial strain taxonomy and isolation source (the fungal strains isolated from paintings and paper and bacteria from wood, paper, and textiles were the most susceptible). The garlic extract contained thiosulfinate (307.66 ± 0.043 µM/g), flavonoids (64.33 ± 7.69 µg QE/g), and polyphenols (0.95 ± 0.011 mg GAE/g) as major compounds and demonstrated the highest efficiency against the Aspergillus versicolor (MIC 3.12-6.25 mg/mL), A. ochraceus (MIC: 3.12 mg/mL), Penicillium expansum (MIC 6.25-12.5 mg/mL), and A. niger (MIC 3.12-50 mg/mL) strains. The extract inhibited the adherence capacity (IIBG% 95.08-44.62%) and the production of cellulase, organic acids, and esterase. This eco-friendly solution shows promising potential for the conservation and safeguarding of tangible cultural heritage, successfully combating the biodeteriogenic microorganisms without undesirable side effects for the natural ecosystems.
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Affiliation(s)
- Viorica Maria Corbu
- Department of Genetics, Faculty of Biology, University of Bucharest, Botanical Garden, 3 Intrarea Portocalelor St., 050095 Bucharest, Romania; (V.M.C.); (O.C.)
- Research Institute of the University of Bucharest—ICUB, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania; (M.I.M.); (M.C.C.)
- Doctoral School of Biology, University of Bucharest, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania
| | - Irina Gheorghe
- Research Institute of the University of Bucharest—ICUB, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania; (M.I.M.); (M.C.C.)
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, Botanical Garden, 3 Intrarea Portocalelor St., District 6, 060101 Bucharest, Romania
- Correspondence: (I.G.); (I.C.M.)
| | - Ioana Cristina Marinaș
- Research Institute of the University of Bucharest—ICUB, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania; (M.I.M.); (M.C.C.)
- Correspondence: (I.G.); (I.C.M.)
| | - Elisabeta Irina Geană
- National R&D Institute for Cryogenics and Isotopic Technologies—ICIT, Rm. Valcea, 4 Uzinei St., 240050 Ramnicu Valcea, Romania;
| | - Maria Iasmina Moza
- Research Institute of the University of Bucharest—ICUB, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania; (M.I.M.); (M.C.C.)
- Doctoral School of Biology, University of Bucharest, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, Botanical Garden, 3 Intrarea Portocalelor St., District 6, 060101 Bucharest, Romania
| | - Ortansa Csutak
- Department of Genetics, Faculty of Biology, University of Bucharest, Botanical Garden, 3 Intrarea Portocalelor St., 050095 Bucharest, Romania; (V.M.C.); (O.C.)
- Doctoral School of Biology, University of Bucharest, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania
| | - Mariana Carmen Chifiriuc
- Research Institute of the University of Bucharest—ICUB, 91-95 Splaiul Independenței St., District 5, 050095 Bucharest, Romania; (M.I.M.); (M.C.C.)
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, Botanical Garden, 3 Intrarea Portocalelor St., District 6, 060101 Bucharest, Romania
- Romanian Academy of Scientists, 54 Spl. Independentei St., District 5, 50085 Bucharest, Romania
- The Romanian Academy, 25, Calea Victoriei, Sector 1, District 1, 010071 Bucharest, Romania
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Enaud R, Cambos S, Viaud E, Guichoux E, Chancerel E, Marighetto A, Etchamendy N, Clark S, Mohammedi K, Cota D, Delhaes L, Gatta-Cherifi B. Gut Microbiota and Mycobiota Evolution Is Linked to Memory Improvement after Bariatric Surgery in Obese Patients: A Pilot Study. Nutrients 2021; 13:nu13114061. [PMID: 34836316 PMCID: PMC8620125 DOI: 10.3390/nu13114061] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/07/2021] [Accepted: 11/11/2021] [Indexed: 12/23/2022] Open
Abstract
Patients with obesity are known to exhibit gut microbiota dysbiosis and memory deficits. Bariatric surgery (BS) is currently the most efficient anti-obesity treatment and may improve both gut dysbiosis and cognition. However, no study has investigated association between changes of gut microbiota and cognitive function after BS. We prospectively evaluated 13 obese patients on anthropometric data, memory functions, and gut microbiota-mycobiota before and six months after BS. The Rey Auditory Verbal Learning Test (AVLT) and the symbol span (SS) of the Weschler Memory Scale were used to assess verbal and working memory, respectively. Fecal microbiota and mycobiota were longitudinally analyzed by 16S and ITS2 rRNA sequencing respectively. AVLT and SS scores were significantly improved after BS (AVLT scores: 9.7 ± 1.7 vs. 11.2 ± 1.9, p = 0.02, and SS scores: 9.7 ± 23.0 vs. 11.6 ± 2.9, p = 0.05). An increase in bacterial alpha-diversity, and Ruminococcaceae, Prevotella, Agaricus, Rhodotorula, Dipodascus, Malassezia, and Mucor were significantly associated with AVLT score improvement after BS, while an increase in Prevotella and a decrease in Clostridium, Akkermansia, Dipodascus and Candida were linked to SS scores improvement. We identified several changes in the microbial communities that differ according to the improvement of either the verbal or working memories, suggesting a complex gut-brain-axis that evolves after BS.
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Affiliation(s)
- Raphaël Enaud
- Centre Hospitalier de Bordeaux, CRCM Pédiatrique, CIC 1401, 33000 Bordeaux, France;
- Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Hôpital Xavier Arnozan, University of Bordeaux, Avenue du Haut Lévêque, 33604 Pessac, France;
- Centre Hospitalier de Bordeaux, University of Bordeaux, FHU ACRONIM, 33000 Bordeaux, France;
| | - Sophie Cambos
- Centre Hospitalier de Bordeaux, Department of Endocrinology, Diabetes and Nutrition, University Hospital of Bordeaux, 33604 Pessac, France;
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, INSERM, 146 rue Léo Saignat, 33076 Bordeaux, France; (E.V.); (A.M.); (N.E.); (S.C.); (D.C.)
| | - Esther Viaud
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, INSERM, 146 rue Léo Saignat, 33076 Bordeaux, France; (E.V.); (A.M.); (N.E.); (S.C.); (D.C.)
| | - Erwan Guichoux
- BIOGECO, INRAE, University of Bordeaux, 69 route d’Arcachon, 33610 Cestas, France; (E.G.); (E.C.)
| | - Emilie Chancerel
- BIOGECO, INRAE, University of Bordeaux, 69 route d’Arcachon, 33610 Cestas, France; (E.G.); (E.C.)
| | - Aline Marighetto
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, INSERM, 146 rue Léo Saignat, 33076 Bordeaux, France; (E.V.); (A.M.); (N.E.); (S.C.); (D.C.)
| | - Nicole Etchamendy
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, INSERM, 146 rue Léo Saignat, 33076 Bordeaux, France; (E.V.); (A.M.); (N.E.); (S.C.); (D.C.)
| | - Samantha Clark
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, INSERM, 146 rue Léo Saignat, 33076 Bordeaux, France; (E.V.); (A.M.); (N.E.); (S.C.); (D.C.)
| | - Kamel Mohammedi
- Centre Hospitalier de Bordeaux, University of Bordeaux, FHU ACRONIM, 33000 Bordeaux, France;
- Centre Hospitalier de Bordeaux, Department of Endocrinology, Diabetes and Nutrition, University Hospital of Bordeaux, 33604 Pessac, France;
| | - Daniela Cota
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, INSERM, 146 rue Léo Saignat, 33076 Bordeaux, France; (E.V.); (A.M.); (N.E.); (S.C.); (D.C.)
- Centre Hospitalier de Bordeaux, University of Bordeaux, FHU TALISMENT, 33000 Bordeaux, France
| | - Laurence Delhaes
- Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Hôpital Xavier Arnozan, University of Bordeaux, Avenue du Haut Lévêque, 33604 Pessac, France;
- Centre Hospitalier de Bordeaux, University of Bordeaux, FHU ACRONIM, 33000 Bordeaux, France;
| | - Blandine Gatta-Cherifi
- Centre Hospitalier de Bordeaux, Department of Endocrinology, Diabetes and Nutrition, University Hospital of Bordeaux, 33604 Pessac, France;
- Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, U862, INSERM, 146 rue Léo Saignat, 33076 Bordeaux, France; (E.V.); (A.M.); (N.E.); (S.C.); (D.C.)
- Centre Hospitalier de Bordeaux, University of Bordeaux, FHU TALISMENT, 33000 Bordeaux, France
- Correspondence:
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Higashinakagawa T, Kikuchi H, Kuwayama H. Mg, K-containing microparticle: A possible active principle of a culture extract produced by a microbial consortium. PLoS One 2021; 16:e0259297. [PMID: 34731185 PMCID: PMC8565762 DOI: 10.1371/journal.pone.0259297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 10/15/2021] [Indexed: 11/18/2022] Open
Abstract
A synthetic microbial consortium called Effective Microorganisms (EM) consists mainly of photosynthetic bacteria, lactic acid bacteria and yeast. Various effects of EM∙XGOLD, a health drink produced by EM, on life cycle of Dictyostelium discoideum were described previously. Here, we report our attempt to identify the active principle, termed EMF, that brought about the observed effects. Throughout the purification processes, the presence of the active principle was monitored by promoted fruiting body formation. By liquid-liquid separation the activity was recovered in aqueous phase, which, after concentration, was further subjected to reverse-phase column chromatography. No activity was detected in any eluant, while almost all the activity was recovered in residual insoluble material. The application of conventional organic chemistry procedures to the residual fraction did not lead to any informative results. Acid treatment of the insoluble material produced air bubbles, suggesting it to be composed of some inorganic carbonate. Viewed under scanning electronmicroscope, the residue revealed spherical particles of μm size range. Energy Dispersive X-ray (EDX) Spectroscopy pointed to the existence, on the surface of the particles, of magnesium and, to a certain extent, of potassium. In separate experiments, acid treatment and alkali neutralization of EM∙XGOLD completely wiped out the stimulatory activity of fruiting body formation. These lines of evidence indicate these Mg, K-containing microparticles to be an active principle of EM culture extract. How these particles exert their effect is currently under intensive investigation.
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Affiliation(s)
- Toru Higashinakagawa
- International Center for Molecular, Cellular and Immunological Research, Tokyo Women’s Medical University, Tokyo, Japan
- EM Research Organization, Okinawa, Japan
- * E-mail:
| | - Haruhisa Kikuchi
- Laboratory of Natural Product Chemistry, Tohoku University, Sendai, Japan
| | - Hidekazu Kuwayama
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
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15
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Fasusi OA, Amoo AE, Babalola OO. Propagation and characterization of viable arbuscular mycorrhizal fungal spores within maize plant (Zea mays L.). J Sci Food Agric 2021; 101:5834-5841. [PMID: 33788958 DOI: 10.1002/jsfa.11235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/18/2021] [Accepted: 03/31/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The harmful effect of chemical fertilizer application on human health and the environment as a modern method of meeting the food demand of the increasing world population demands an urgent alternative that is environmentally friendly, which will pose no harm to human health and the environment. Arbuscular mycorrhizal fungi (AMF) are beneficial soil microorganisms that provide various ecological functions in increasing soil fertility and enhancing plant growth. This present study aimed to propagate, characterize and examine the effect of viable arbuscular mycorrhizal fungal spores on maize (Zea mays L) hosts using molecular methods. The propagation of AMF in the host plant using sterile soil and vermiculite was conducted in the greenhouse. RESULT The effect of AMF inoculation revealed a significant difference (P > 0.05) in maize growth, root colonization and AMF spore count when compared with the control. In all the parameters measured in this study, all the AMF spores propagated had a positive effect on the maize plant over the control, with the highest value mostly recorded in Rhizophagus irregularis AOB1. The molecular characterization of the spore using a specific universal primer for Glomeromycota established the success of the propagation process, which enhanced the classification of the AMF species into Rhizophagus irregularis OAB1, Glomus mosseae OAB2 and Paraglomus occultum OAB3. CONCLUSION This finding will be a starting point in producing arbuscular mycorrhizal inoculum as a biofertilizer to enhance plant growth promotion. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Oluwaseun Adeyinka Fasusi
- Food Security and Safety Niche, Faculty of Natural and Agricultural Science, North-West University, Mmabatho, South Africa
| | - Adenike Eunice Amoo
- Food Security and Safety Niche, Faculty of Natural and Agricultural Science, North-West University, Mmabatho, South Africa
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche, Faculty of Natural and Agricultural Science, North-West University, Mmabatho, South Africa
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16
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Arellano-Caicedo C, Ohlsson P, Bengtsson M, Beech JP, Hammer EC. Habitat geometry in artificial microstructure affects bacterial and fungal growth, interactions, and substrate degradation. Commun Biol 2021; 4:1226. [PMID: 34702996 PMCID: PMC8548513 DOI: 10.1038/s42003-021-02736-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 10/01/2021] [Indexed: 11/25/2022] Open
Abstract
Microhabitat conditions determine the magnitude and speed of microbial processes but have been challenging to investigate. In this study we used microfluidic devices to determine the effect of the spatial distortion of a pore space on fungal and bacterial growth, interactions, and substrate degradation. The devices contained channels differing in bending angles and order. Sharper angles reduced fungal and bacterial biomass, especially when angles were repeated in the same direction. Substrate degradation was only decreased by sharper angles when fungi and bacteria were grown together. Investigation at the cellular scale suggests that this was caused by fungal habitat modification, since hyphae branched in sharp and repeated turns, blocking the dispersal of bacteria and the substrate. Our results demonstrate how the geometry of microstructures can influence microbial activity. This can be transferable to soil pore spaces, where spatial occlusion and microbial feedback on microstructures is thought to explain organic matter stabilization.
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Affiliation(s)
| | - Pelle Ohlsson
- Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Martin Bengtsson
- Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Jason P Beech
- Division of Solid State Physics, Lund University, Lund, Sweden
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17
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Leggieri PA, Kerdman-Andrade C, Lankiewicz TS, Valentine MT, O’Malley MA. Non-destructive quantification of anaerobic gut fungi and methanogens in co-culture reveals increased fungal growth rate and changes in metabolic flux relative to mono-culture. Microb Cell Fact 2021; 20:199. [PMID: 34663313 PMCID: PMC8522008 DOI: 10.1186/s12934-021-01684-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 09/22/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Quantification of individual species in microbial co-cultures and consortia is critical to understanding and designing communities with prescribed functions. However, it is difficult to physically separate species or measure species-specific attributes in most multi-species systems. Anaerobic gut fungi (AGF) (Neocallimastigomycetes) are native to the rumen of large herbivores, where they exist as minority members among a wealth of prokaryotes. AGF have significant biotechnological potential owing to their diverse repertoire of potent lignocellulose-degrading carbohydrate-active enzymes (CAZymes), which indirectly bolsters activity of other rumen microbes through metabolic exchange. While decades of literature suggest that polysaccharide degradation and AGF growth are accelerated in co-culture with prokaryotes, particularly methanogens, methods have not been available to measure concentrations of individual species in co-culture. New methods to disentangle the contributions of AGF and rumen prokaryotes are sorely needed to calculate AGF growth rates and metabolic fluxes to prove this hypothesis and understand its causality for predictable co-culture design. RESULTS We present a simple, microplate-based method to measure AGF and methanogen concentrations in co-culture based on fluorescence and absorbance spectroscopies. Using samples of < 2% of the co-culture volume, we demonstrate significant increases in AGF growth rate and xylan and glucose degradation rates in co-culture with methanogens relative to mono-culture. Further, we calculate significant differences in AGF metabolic fluxes in co-culture relative to mono-culture, namely increased flux through the energy-generating hydrogenosome organelle. While calculated fluxes highlight uncertainties in AGF primary metabolism that preclude definitive explanations for this shift, our method will enable steady-state fluxomic experiments to probe AGF metabolism in greater detail. CONCLUSIONS The method we present to measure AGF and methanogen concentrations enables direct growth measurements and calculation of metabolic fluxes in co-culture. These metrics are critical to develop a quantitative understanding of interwoven rumen metabolism, as well as the impact of co-culture on polysaccharide degradation and metabolite production. The framework presented here can inspire new methods to probe systems beyond AGF and methanogens. Simple modifications to the method will likely extend its utility to co-cultures with more than two organisms or those grown on solid substrates to facilitate the design and deployment of microbial communities for bioproduction and beyond.
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Affiliation(s)
- Patrick A. Leggieri
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 USA
| | - Corey Kerdman-Andrade
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 USA
| | - Thomas S. Lankiewicz
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106 USA
- Joint BioEnergy Institute (JBEI), Emeryville, CA 94608 USA
| | - Megan T. Valentine
- Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106 USA
| | - Michelle A. O’Malley
- Department of Chemical Engineering, University of California, Santa Barbara, CA 93106 USA
- Joint BioEnergy Institute (JBEI), Emeryville, CA 94608 USA
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18
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Sheng B, Chen Y, Sun L, Xu P, Han B, Li X, Yin J, Li T, Guan H, Chen S, Wang Q, Li C, Li S, Jiang X, Wang P, He Q, Wang Y, Xiao W, Yang H. Antifungal Treatment Aggravates Sepsis through the Elimination of Intestinal Fungi. Oxid Med Cell Longev 2021; 2021:2796700. [PMID: 34707775 PMCID: PMC8545547 DOI: 10.1155/2021/2796700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 09/27/2021] [Indexed: 12/26/2022]
Abstract
Prophylactic antifungal therapy is widely adopted clinically for critical patients and effective in reducing the morbidity of invasive fungal infection and improves outcomes of those diagnosed patients; however, it is not associated with higher overall survival. As intestinal commensal fungi play a fundamental role in the host immune response in health and disease, we propose that antifungal therapy may eliminate intestinal fungi and aggravate another critical syndrome, sepsis. Here, with murine sepsis model, we found that antifungal therapy with fluconazole dismissed intestinal fungal burden and aggravated endotoxin-induced but no gram-positive bacteria-induced sepsis. Nevertheless, antifungal therapy did not exert its detrimental effect on germ-free mice. Moreover, colonizing more commensal fungi in the mouse intestine or administration of fungal cell wall component mannan protected the mice from endotoxin-induced sepsis. On the molecular level, we demonstrated that antifungal therapy aggravated endotoxin sepsis through promoting Gasdermin D cleavage in the distal small intestine. Intestinal colonization with commensal fungi inhibited Gasdermin D cleavage in response to lipopolysaccharide challenge. These findings show that intestinal fungi inhibit Gasdermin D-mediated pyroptosis and protect the mice from endotoxin-induced sepsis. This study demonstrates the protective role of intestinal fungi in the pathogenesis of endotoxin-induced sepsis in the laboratory. It will undoubtedly prompt us to study the relationship between antifungal therapy and sepsis in critical patients who are susceptible to endotoxin-induced sepsis in the future.
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Affiliation(s)
- Baifa Sheng
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
- Department of Emergency Medicine, PLA Strategic Support Force Characteristic Medical Center, Beijing 100101, China
| | - Yihui Chen
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
- Department of General Surgery, The First Mobile Corps Hospital of PAP, Dingzhou City, 073000 Hebei Province, China
| | - Lihua Sun
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Peng Xu
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Ben Han
- Department of Nutrition, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Xiaolong Li
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Jiuheng Yin
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Teming Li
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Haidi Guan
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Shuaishuai Chen
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Qi Wang
- Division of Hematology-Oncology, Department of Medicine Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Chuangen Li
- Department of Laboratory Animal Science, College of Basic Medical Science, Army Medical University, Chongqing 400038, China
| | - Shiqiang Li
- Department of Laboratory Animal Science, College of Basic Medical Science, Army Medical University, Chongqing 400038, China
| | - Xianhong Jiang
- Department of Laboratory Animal Science, College of Basic Medical Science, Army Medical University, Chongqing 400038, China
| | - Peng Wang
- Department of Laboratory Animal Science, College of Basic Medical Science, Army Medical University, Chongqing 400038, China
| | - Qiuyue He
- Department of Laboratory Animal Science, College of Basic Medical Science, Army Medical University, Chongqing 400038, China
| | - Yong Wang
- Department of Laboratory Animal Science, College of Basic Medical Science, Army Medical University, Chongqing 400038, China
| | - Weidong Xiao
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Hua Yang
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
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Chan MWH, Ali A, Ullah A, Mirani ZA, Balthazar-Silva D. A Size-dependent Bioaccumulation of Metal Pollutants, Antibacterial and Antifungal Activities of Telescopium telescopium, Nerita albicilla and Lunella coronata. Environ Toxicol Pharmacol 2021; 87:103722. [PMID: 34391907 DOI: 10.1016/j.etap.2021.103722] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/02/2021] [Accepted: 08/04/2021] [Indexed: 06/13/2023]
Abstract
We assessed metal/metalloid pollutants (through multi-indices) in seawater, sediments, tissues and shells of gastropods using various indices such as contamination degree (modified/unmodified; Cd/mCd; 1875/187.5). From sediment indices; e.g. the potential ecological risk index/enrichment factor (Eri/EF; 3396.8/105.5) indicated the area to be highly contaminated with metal/metalloid pollutants. Indeed, bioaccumulation with these materials was gastropod size dependent. Antimicrobial and percentage activity indices (AMI/PAI) for; T. telescopium was (AMI/PAI; 1.59/159), N. albicilla (1.14/114) and L. coronata (0.95/95) against E. coli. Similarly T. telescopium (1.33/133), N. albicilla (1.19/119) and L. coronata (1.14/114) have AMI/PAI against A. terreus. The total activity index (TAI), for T. telescopium was the highest, while L. coronata has lowest for all pathogens. This study indicates, T. telescopium, N. albicilla and L. coronata, surviving under metal/metalloid stress exhibited altered natural defense to pathogens which was related to the degree of toxin bioaccumulation.
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Affiliation(s)
| | - Amjad Ali
- Centre of Excellence in Marine Biology, University of Karachi, Karachi, 75270, Pakistan
| | - Asad Ullah
- Food and Marine Resources Research Center, Pakistan Council of Scientific and Industrial Research Laboratories Complex, Karachi, 75280, Pakistan
| | - Zulfiqar Ali Mirani
- Pakistan Council of Scientific and Industrial Research Laboratories Complex, Microbiology Section, Karachi, 75280, Pakistan
| | - Danilo Balthazar-Silva
- Instituto de Ciências da Saúde, Universidade Paulista, Campus Jundiaí, São Paulo, Brazil; Laboratório de Manejo, Ecologia e Conservação Marinha, Instituto Oceanográfico, USP, São Paulo, Brazil
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20
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Hopke A, Mela A, Ellett F, Carter-House D, Peña JF, Stajich JE, Altamirano S, Lovett B, Egan M, Kale S, Kronholm I, Guerette P, Szewczyk E, McCluskey K, Breslauer D, Shah H, Coad BR, Momany M, Irimia D. Crowdsourced analysis of fungal growth and branching on microfluidic platforms. PLoS One 2021; 16:e0257823. [PMID: 34587206 PMCID: PMC8480888 DOI: 10.1371/journal.pone.0257823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 09/10/2021] [Indexed: 01/16/2023] Open
Abstract
Fungal hyphal growth and branching are essential traits that allow fungi to spread and proliferate in many environments. This sustained growth is essential for a myriad of applications in health, agriculture, and industry. However, comparisons between different fungi are difficult in the absence of standardized metrics. Here, we used a microfluidic device featuring four different maze patterns to compare the growth velocity and branching frequency of fourteen filamentous fungi. These measurements result from the collective work of several labs in the form of a competition named the "Fungus Olympics." The competing fungi included five ascomycete species (ten strains total), two basidiomycete species, and two zygomycete species. We found that growth velocity within a straight channel varied from 1 to 4 μm/min. We also found that the time to complete mazes when fungal hyphae branched or turned at various angles did not correlate with linear growth velocity. We discovered that fungi in our study used one of two distinct strategies to traverse mazes: high-frequency branching in which all possible paths were explored, and low-frequency branching in which only one or two paths were explored. While the high-frequency branching helped fungi escape mazes with sharp turns faster, the low-frequency turning had a significant advantage in mazes with shallower turns. Future work will more systematically examine these trends.
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Affiliation(s)
- Alex Hopke
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
| | - Alex Mela
- Fungal Biology Group and Plant Biology Department, University of Georgia, Athens, Georgia, United States of America
| | - Felix Ellett
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Derreck Carter-House
- Department of Microbiology and Plant Pathology, University of California, Riverside, California, United States of America
| | - Jesús F. Peña
- Department of Microbiology and Plant Pathology, University of California, Riverside, California, United States of America
| | - Jason E. Stajich
- Department of Microbiology and Plant Pathology, University of California, Riverside, California, United States of America
| | - Sophie Altamirano
- Department of Microbiology and Immunology, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Brian Lovett
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia, United States of America
| | - Martin Egan
- Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Shiv Kale
- Nutritional Immunology and Molecular Medicine Institute, Blacksburg, Virginia, United States of America
| | - Ilkka Kronholm
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
| | - Paul Guerette
- Bolt Threads Inc., Emeryville, California, United States of America
| | - Edyta Szewczyk
- Bolt Threads Inc., Emeryville, California, United States of America
| | - Kevin McCluskey
- Bolt Threads Inc., Emeryville, California, United States of America
| | - David Breslauer
- Bolt Threads Inc., Emeryville, California, United States of America
| | - Hiral Shah
- Bharat Chattoo Genome Research Centre, Department of Microbiology and Biotechnology Centre, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | - Bryan R. Coad
- School of Agriculture, Food & Wine, University of Adelaide, Adelaide, South Australia, Australia
| | - Michelle Momany
- Fungal Biology Group and Plant Biology Department, University of Georgia, Athens, Georgia, United States of America
- * E-mail: (DI); (MM)
| | - Daniel Irimia
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
- Shriners Hospital for Children, Boston, Massachusetts, United States of America
- * E-mail: (DI); (MM)
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21
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Flores Francisco BG, Ponce IM, Plascencia Espinosa MÁ, Mendieta Moctezuma A, López Y López VE. Advances in the biological control of phytoparasitic nematodes via the use of nematophagous fungi. World J Microbiol Biotechnol 2021; 37:180. [PMID: 34562178 DOI: 10.1007/s11274-021-03151-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/15/2021] [Indexed: 10/20/2022]
Abstract
Agricultural production is one of most important activities for food supply and demand, that provides a source of raw materials, and generates commercial opportunities for other industries around the world. It may be both positively and negatively affected by climatic and biological factors. Negative biological factors are those caused by viruses, bacteria, or parasites. Given the serious problems posed by phytoparasitic nematodes for farmers, causing crop losses globally every year, the agrochemical industry has developed compounds with the capacity to inhibit their development; however, they can cause the death of other beneficial organisms and their lixiviation can contaminate the water table. On the other hand, the positive biological factors are found in biotechnology, the scientific discipline that develops products, such as nematophagous fungi (of which Purpureocillium lilacinum and Pochonia chlamydosporia have the greatest potential), for the control of pests and/or diseases. The present review focuses on the importance of nematophagous fungi, particularly sedentary endoparasitic nematodes, their research on the development of biological control agents, the mass production of fungi Purpureocillium lilacinum and Pochonia chlamydosporia, and their limited commercialization due to the lack of rigorous methods that enable the anticipation of complex interactions between plant and phytopathogenic agents.
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Affiliation(s)
- Bianca Guadalupe Flores Francisco
- Centro de Investigación en Biotecnología Aplicada del Instituto Politécnico Nacional. Laboratorio de Bioprocesos, Carretera Estatal Sta. Inés Tecuexcomac-Tepetitla, 90700, Tepetitla de Lardizábal, Tlaxcala, Mexico
| | - Isabel Méndez Ponce
- Centro de Investigación en Biotecnología Aplicada del Instituto Politécnico Nacional. Laboratorio de Bioprocesos, Carretera Estatal Sta. Inés Tecuexcomac-Tepetitla, 90700, Tepetitla de Lardizábal, Tlaxcala, Mexico
| | - Miguel Ángel Plascencia Espinosa
- Centro de Investigación en Biotecnología Aplicada del Instituto Politécnico Nacional. Laboratorio de Bioprocesos, Carretera Estatal Sta. Inés Tecuexcomac-Tepetitla, 90700, Tepetitla de Lardizábal, Tlaxcala, Mexico
| | - Aarón Mendieta Moctezuma
- Centro de Investigación en Biotecnología Aplicada del Instituto Politécnico Nacional. Laboratorio de Bioprocesos, Carretera Estatal Sta. Inés Tecuexcomac-Tepetitla, 90700, Tepetitla de Lardizábal, Tlaxcala, Mexico
| | - Víctor Eric López Y López
- Centro de Investigación en Biotecnología Aplicada del Instituto Politécnico Nacional. Laboratorio de Bioprocesos, Carretera Estatal Sta. Inés Tecuexcomac-Tepetitla, 90700, Tepetitla de Lardizábal, Tlaxcala, Mexico.
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Ahmed A, Sharma A. Fungal Solubilisation and Subsequent Microbial Methanation of Coal Processing Wastes. Appl Biochem Biotechnol 2021; 193:3970-3982. [PMID: 34542819 DOI: 10.1007/s12010-021-03681-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 09/08/2021] [Indexed: 11/30/2022]
Abstract
Large quantities of rejects from coal processing plants are currently disposed of as waste piles or in ponds and rivers, resulting in environmental concerns including pollution of rivers, and ground and surface water contamination. This work investigates for the first time, a two-stage microbial process for converting coal processing wastes (coal rejects) to methane, involving (1) fungal solubilisation of coal rejects and (2) microbial methanation of the solubilised products. Phanerochaete chrysosporium, Trichoderma viride and Neurospora discreta were screened for their ability to solubilise coal rejects. N. discreta was found to be the most suitable candidate based on the extent of bio-solubilisation, laccase activity and reversed-phase high-performance liquid chromatography (RP-HPLC) analysis. Bio-methanation of fungal-solubilised coal rejects was carried out in mesophilic anaerobic reactors with no additional carbon source, using inoculum from an anaerobic food digester. Coal rejects solubilised by N. discreta produced 3- to 6-fold higher methane compared to rejects solubilised by the other two fungi. No methane was produced from untreated coal rejects, demonstrating the importance of the fungal solubilisation stage. A total of 3.7 mmol of methane was generated per gram of carbon in 15 days from N. discreta-solubilised coal rejects. This process offers a timely, environment-friendly, and sustainable solution for the treatment of coal rejects and the generation of value-added products such as methane and volatile fatty acids.
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Affiliation(s)
- Asma Ahmed
- School of Psychology and Life Sciences, Canterbury Christ Church University, North Holmes Road, Canterbury, CT1 1QU, UK.
| | - Anima Sharma
- Department of Chemical Engineering, Birla Institute of Technology and Science (Pilani), Hyderabad Campus, Hyderabad, 500078, India
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Wardana AA, Koga A, Tanaka F, Tanaka F. Antifungal features and properties of chitosan/sandalwood oil Pickering emulsion coating stabilized by appropriate cellulose nanofiber dosage for fresh fruit application. Sci Rep 2021; 11:18412. [PMID: 34531497 PMCID: PMC8445958 DOI: 10.1038/s41598-021-98074-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/02/2021] [Indexed: 02/08/2023] Open
Abstract
A novel composite edible coating film was developed from 0.8% chitosan (CS) and 0.5% sandalwood oil (SEO). Cellulose nanofibers (CNFs) were used as a stabilizer agent of oil-in-water Pickering emulsion. We found four typical groups of CNF level-dependent emulsion stabilization, including (1) unstable emulsion in the absence of CNFs; (2) unstable emulsion (0.006-0.21% CNFs); (3) stable emulsion (0.24-0.31% CNFs); and (4) regular emulsion with the addition of surfactant. Confocal laser scanning microscopy was performed to reveal the characteristics of droplet diameter and morphology. Antifungal tests against Botrytis cinerea and Penicillium digitatum, between emulsion coating stabilized with CNFs (CS-SEOpick) and CS or CS-SEO was tested. The effective concentration of CNFs (0.24%) may improve the performance of CS coating and maintain CS-SEO antifungal activity synergistically confirmed with a series of assays (in vitro, in vivo, and membrane integrity changes). The incorporation of CNFs contributed to improve the functional properties of CS and SEO-loaded CS including light transmission at UV and visible light wavelengths and tensile strength. Atomic force microscopy and scanning electron microscopy were employed to characterize the biocompatibility of each coating film formulation. Emulsion-CNF stabilized coating may have potential applications for active coating for fresh fruit commodities.
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Affiliation(s)
- Ata Aditya Wardana
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan
- Food Technology Department, Faculty of Engineering, Bina Nusantara University, Jakarta, 11480, Indonesia
| | - Arisa Koga
- Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan
| | - Fumina Tanaka
- Laboratory of Postharvest Science, Faculty of Agriculture, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan
| | - Fumihiko Tanaka
- Laboratory of Postharvest Science, Faculty of Agriculture, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan.
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Hu W, Ran J, Dong L, Du Q, Ji M, Yao S, Sun Y, Gong C, Hou Q, Gong H, Chen R, Lu J, Xie S, Wang Z, Huang H, Li X, Xiong J, Xia R, Wei M, Zhao D, Zhang Y, Li J, Yang H, Wang X, Deng Y, Sun Y, Li H, Zhang L, Chu Q, Li X, Aqeel M, Manan A, Akram MA, Liu X, Li R, Li F, Hou C, Liu J, He JS, An L, Bardgett RD, Schmid B, Deng J. Aridity-driven shift in biodiversity-soil multifunctionality relationships. Nat Commun 2021; 12:5350. [PMID: 34504089 PMCID: PMC8429721 DOI: 10.1038/s41467-021-25641-0] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 08/12/2021] [Indexed: 11/09/2022] Open
Abstract
Relationships between biodiversity and multiple ecosystem functions (that is, ecosystem multifunctionality) are context-dependent. Both plant and soil microbial diversity have been reported to regulate ecosystem multifunctionality, but how their relative importance varies along environmental gradients remains poorly understood. Here, we relate plant and microbial diversity to soil multifunctionality across 130 dryland sites along a 4,000 km aridity gradient in northern China. Our results show a strong positive association between plant species richness and soil multifunctionality in less arid regions, whereas microbial diversity, in particular of fungi, is positively associated with multifunctionality in more arid regions. This shift in the relationships between plant or microbial diversity and soil multifunctionality occur at an aridity level of ∼0.8, the boundary between semiarid and arid climates, which is predicted to advance geographically ∼28% by the end of the current century. Our study highlights that biodiversity loss of plants and soil microorganisms may have especially strong consequences under low and high aridity conditions, respectively, which calls for climate-specific biodiversity conservation strategies to mitigate the effects of aridification.
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Affiliation(s)
- Weigang Hu
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Jinzhi Ran
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Longwei Dong
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Qiajun Du
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Mingfei Ji
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Shuran Yao
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yuan Sun
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Chunmei Gong
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Qingqing Hou
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Haiyang Gong
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Renfei Chen
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Jingli Lu
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Shubin Xie
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Zhiqiang Wang
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Heng Huang
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xiaowei Li
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Junlan Xiong
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Rui Xia
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Maohong Wei
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Dongmin Zhao
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yahui Zhang
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Jinhui Li
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Huixia Yang
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xiaoting Wang
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yan Deng
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Ying Sun
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Hailing Li
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Liang Zhang
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Qipeng Chu
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xinwei Li
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Muhammad Aqeel
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Abdul Manan
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Muhammad Adnan Akram
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xianghan Liu
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Rui Li
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Fan Li
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Chen Hou
- Department of Biological Science, Missouri University of Science and Technology, Rolla, MO, USA
| | - Jianquan Liu
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Jin-Sheng He
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Lizhe An
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Richard D Bardgett
- Department of Earth and Environmental Sciences, The University of Manchester, Manchester, UK.
| | - Bernhard Schmid
- Department of Geography, Remote Sensing Laboratories, University of Zurich, Zurich, Switzerland.
| | - Jianming Deng
- State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, China.
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Bao JR, Master RN, Jones RS, Clark RB, Moore EC, Shier KL. Recovery and Its Dynamics of Filamentous Fungi from Clinical Specimen Cultures: An Extensive Study. Microbiol Spectr 2021; 9:e0008021. [PMID: 34346747 PMCID: PMC8552699 DOI: 10.1128/spectrum.00080-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 07/15/2021] [Indexed: 12/01/2022] Open
Abstract
The culture method remains vital in diagnosing fungal infections, but extensive data-based evaluation of the method, especially for filamentous fungi (molds), is minimal. The purpose of this study was to characterize mold recoveries from fungal cultures and the impact of media and incubation duration. Clinical specimens for fungal cultures were submitted primarily from the eastern and central United States, and mold isolation data were prospectively collected and analyzed. A total of 1,821 molds in 59 genera were isolated from 1,687 positive specimens, accounting for approximately 5.6% of our cohort of 30,000 fungal cultures. Within 2 weeks, nearly 90% of molds and 97.3% of Aspergillus fumigatus complex were recovered (>95% confidence interval [CI]). All Mucorales fungi were recovered within 11 days of incubation. The recovery peak time was day 3 for Mucorales fungi, day 4 for hyaline molds, day 5 for dematiaceous molds, and day 7 for Onygenales fungi. The recovery of Histoplasma capsulatum and Trichophyton species in the fourth week of incubation reveals that a 3-week incubation time is insufficient. Inhibitory mold agar was the best medium for recovering all mold types among all tested specimen types, yielding nearly 78% of mold growth overall, indicating the necessity of selective medium for fungal cultures. IMPORTANCE Fungal culture is the gold standard method of diagnosing fungal infections, but important information, such as the impact of media and incubation times on fungal recovery, is not well documented. This study addressed these gaps using extensive data-based evaluation focused on molds. We identified the best medium types and incubation times for better fungal culture practice. We analyzed 1,821 molds from 1,687 positive specimens in our cohort of approximately 30,000 fungal cultures. Mold recovery peaked between 3 and 7 days of incubation, dependent upon the type of mold. Some well-defined fungal pathogens, such as Histoplasma capsulatum and Trichophyton species, were isolated in the fourth week of incubation. Inhibitory mold agar was identified as the best medium for recovering all mold types among all tested specimen sources. As we are aware, this is the largest study of fungal culture methods and supports 4 weeks of incubation for optimal mold recovery.
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Affiliation(s)
- Jian R. Bao
- Quest Diagnostics Nichols Institute, Chantilly, Virginia, USA
| | | | - Robert S. Jones
- Quest Diagnostics Nichols Institute, Chantilly, Virginia, USA
| | | | | | - Kileen L. Shier
- Quest Diagnostics Nichols Institute, Chantilly, Virginia, USA
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Singh BK, Tiwari S, Dubey NK. Essential oils and their nanoformulations as green preservatives to boost food safety against mycotoxin contamination of food commodities: a review. J Sci Food Agric 2021; 101:4879-4890. [PMID: 33852733 DOI: 10.1002/jsfa.11255] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 04/02/2021] [Accepted: 04/14/2021] [Indexed: 06/12/2023]
Abstract
Postharvest food spoilage due to fungal and mycotoxin contamination is a major challenge in tropical countries, leading to severe adverse effects on human health. Because of the negative effects of synthetic preservatives on both human health and the environment, it has been recommended that chemicals that have a botanical origin, with an eco-friendly nature and a favorable safety profile, should be used as green preservatives. Recently, the food industry and consumers have been shifting drastically towards green consumerism because of their increased concerns about health and the environment. Among different plant-based products, essential oils (EOs) and their bioactive components are strongly preferred as antimicrobial food preservatives. Despite having potent antimicrobial efficacy and preservation potential against fungal and mycotoxin contamination, essential oils and their bioactive components have limited practical applicability caused by their high volatility and their instability, implying the development of techniques to overcome the challenges associated with EO application. Essential oils and their bioactive components are promising alternatives to synthetic preservatives. To overcome challenges associated with EOs, nanotechnology has emerged as a novel technology in the food industries. Nanoencapsulation may boost the preservative potential of different essential oils by improving their solubility, stability, and targeted sustainable release. Nanoencapsulation of EOs is therefore currently being practiced to improve the stability and bioactivity of natural products. The present review has dealt extensively with the application of EOs and their nanoformulated products encapsulated in suitable polymeric matrices, so as to recommend them as novel green preservatives against foodborne molds and mycotoxin-induced deterioration of stored food commodities. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Bijendra Kumar Singh
- Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Shikha Tiwari
- Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Nawal Kishore Dubey
- Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
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27
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Yi Y, Fan K, Wang J, Fu Q, Zhou X, Zhang Y, Zhang H. Primary research on sampling scheme for analyzing mycotoxin distribution in wheat and rice fields. J Sci Food Agric 2021; 101:4980-4986. [PMID: 33543474 DOI: 10.1002/jsfa.11141] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/29/2021] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Mycotoxins are among the most severe food contaminants. Deoxynivalenol and aflatoxin contamination are predominant in wheat and rice, respectively. Nowadays, there are no standardized and approved grain-sampling schemes worldwide. This study aimed to develop a scientific grain-sampling scheme to investigate the regularity of mycotoxin distributed in wheat and rice fields. The data were analyzed with analysis of variance and cluster analysis to select a better sampling scheme. RESULTS Considering the influences of the weather before harvest (temperature, humidity, wind direction, and other conditions), we sampled grains from different places in different farmlands and detected the mycotoxin content of the sampled grains. The mycotoxin content had extremely significant differences in the area of rice fields (P<0.01) and significant differences in the area of wheat fields (P<0.05). The filtering effect existed peripheral the field areas, especially peripheral the humid areas, where the fungi were filtered and the toxin were easily produced. Furthermore, the upwind direction peripheral the field areas cause more filterature effect than other wind direction. Although 97% of mycotoxins in wheat can be removed through the shelling process, the toxin content were not obviously affected by rice lodging in the field. According to the cluster analysis, the peripheral and middle areas were divided into the same group with higher mycotoxin content. CONCLUSION This paper developed a sampling scheme to detect the mycotoxin content of wheat and rice in the field, considering the temperature and humidity of the weather, locations, and other grain contamination conditions before harvest. Meanwhile, the sampling rule of lodging and wind direction in the field was also assayed. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Yanjie Yi
- College of Biological Engineering, Henan University of Technology, Zhengzhou, China
| | - Kun Fan
- College of Biological Engineering, Henan University of Technology, Zhengzhou, China
| | - Jiaqi Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou, China
| | - Qianzhen Fu
- College of Biological Engineering, Henan University of Technology, Zhengzhou, China
| | - Xianqing Zhou
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Yurong Zhang
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Huiru Zhang
- College of Biological Engineering, Henan University of Technology, Zhengzhou, China
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28
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Zhang Y, Zhang J, Zhang Y, Hu H, Luo S, Zhang L, Zhou H, Li P. Effects of in-package atmospheric cold plasma treatment on the qualitative, metabolic and microbial stability of fresh-cut pears. J Sci Food Agric 2021; 101:4473-4480. [PMID: 33432579 DOI: 10.1002/jsfa.11085] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/29/2020] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The greatest hurdle to commercial marketing of fresh-cut fruits and vegetables is limited shelf life due to microbial hazards and quality deterioration. Atmospheric cold plasma (ACP) is an emerging non-thermal technology with significant potential to improve the safety and storability of fresh products. The objective of this study was to evaluate the effects of ACP, generated in sealed packaging, on the qualitative, metabolic and microbial stability of fresh-cut pears during simulated cold storage. RESULTS ACP treatments were effective in inhibiting the growth of mesophilic aerobic bacteria, yeast and mold, particularly CP3 (65 kV, 1 min), which could prolong shelf life to the greatest extent. While decontamination was not always associated with an increase in plasma intensity. Moreover, at 65 kV for 1 min, ACP treatment had the potential to retard respiration, and maintain organoleptic properties and other quality attributes. Additionally, peroxidase and pectin methylesterase (PME) activities were reduced immediately after treatments. These effects were dependent on treatment voltage and time, while a subsequent recovery in activity was only observed for PME. CONCLUSION The results obtained from this study will contribute to an understanding of the effects of in-package ACP treatments on the storability and microbial safety of fresh-cut pears. This knowledge could be beneficial in reducing quality losses for fresh-cut pears and the preservation of other products. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Yingtong Zhang
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, PR China
| | - Jianhao Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
| | - Yuanyuan Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
| | - Huali Hu
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, PR China
| | - Shufen Luo
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, PR China
| | - Leigang Zhang
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, PR China
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, PR China
| | - Hongsheng Zhou
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, PR China
| | - Pengxia Li
- Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing, PR China
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, PR China
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, PR China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing, PR China
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29
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Gach J, Olejniczak T, Krężel P, Boratyński F. Microbial Synthesis and Evaluation of Fungistatic Activity of 3-Butyl-3-hydroxyphthalide, the Mammalian Metabolite of 3- n-Butylidenephthalide. Int J Mol Sci 2021; 22:ijms22147600. [PMID: 34299220 PMCID: PMC8304955 DOI: 10.3390/ijms22147600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/25/2021] [Accepted: 07/13/2021] [Indexed: 01/05/2023] Open
Abstract
Phthalides are bioactive compounds that naturally occur in the family Apiaceae. Considering their potentially versatile applications, it is desirable to determine their physical properties, activity and metabolic pathways. This study aimed to examine the utility of whole-cell biocatalysts for obtaining 3-butyl-3-hydroxyphthalide, which is the metabolite formulated during mammalian metabolism of 3-n-butylidenephthalide. We performed transformations using 10 strains of fungi, five of which efficiently produced 3-butyl-3-hydroxyphthalide. The product yield, determined by high-performance liquid chromatography, reached 97.6% when Aspergillus candidus AM 386 was used as the biocatalyst. Increasing the scale of the process resulted in isolation yields of 29–45% after purification via reversed-phase thin layer chromatography, depending on the strain of the microorganism used. We proposed different mechanisms for product formation; however, hydration of 3-n-butylidenephthalide seems to be the most probable. Additionally, all phthalides were tested against clinical strains of Candida albicans using the microdilution method. Two phthalides showed a minimum inhibitory concentration, required to inhibit the growth of 50% of organisms, below 50 µg/mL. The 3-n-butylidenephthalide metabolite was generally inactive, and this feature in combination with its low lipophilicity suggests its involvement in the detoxification pathway. The log P value of tested compounds was in the range of 2.09–3.38.
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Cosme M, Fernández I, Declerck S, van der Heijden MGA, Pieterse CMJ. A coumarin exudation pathway mitigates arbuscular mycorrhizal incompatibility in Arabidopsis thaliana. Plant Mol Biol 2021; 106:319-334. [PMID: 33825084 DOI: 10.1007/s11103-021-01143-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 03/21/2021] [Indexed: 06/12/2023]
Abstract
Overexpression of genes involved in coumarin production and secretion can mitigate mycorrhizal incompatibility in nonhost Arabidopsis plants. The coumarin scopoletin, in particular, stimulates pre-penetration development and metabolism in mycorrhizal fungi. Although most plants can benefit from mutualistic associations with arbuscular mycorrhizal (AM) fungi, nonhost plant species such as the model Arabidopsis thaliana have acquired incompatibility. The transcriptional response of Arabidopsis to colonization by host-supported AM fungi switches from initial AM recognition to defense activation and plant growth antagonism. However, detailed functional information on incompatibility in nonhost-AM fungus interactions is largely missing. We studied interactions between host-sustained AM fungal networks of Rhizophagus irregularis and 18 Arabidopsis genotypes affected in nonhost penetration resistance, coumarin production and secretion, and defense (salicylic acid, jasmonic acid, and ethylene) and growth hormones (auxin, brassinosteroid, cytokinin, and gibberellin). We demonstrated that root-secreted coumarins can mitigate incompatibility by stimulating fungal metabolism and promoting initial steps of AM colonization. Moreover, we provide evidence that major molecular defenses in Arabidopsis do not operate as primary mechanisms of AM incompatibility nor of growth antagonism. Our study reveals that, although incompatible, nonhost plants can harbor hidden tools that promote initial steps of AM colonization. Moreover, it uncovered the coumarin scopoletin as a novel signal in the pre-penetration dialogue, with possible implications for the chemical communication in plant-mycorrhizal fungi associations.
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Affiliation(s)
- Marco Cosme
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, PO Box 800.56, 3508 TB, Utrecht, the Netherlands.
- Mycology, Applied Microbiology, Earth and Life Institute, Université Catholique de Louvain, Croix du sud 2, bte L7.05.06, 1348, Louvain-la-Neuve, Belgium.
| | - Iván Fernández
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, PO Box 800.56, 3508 TB, Utrecht, the Netherlands
| | - Stéphane Declerck
- Mycology, Applied Microbiology, Earth and Life Institute, Université Catholique de Louvain, Croix du sud 2, bte L7.05.06, 1348, Louvain-la-Neuve, Belgium
| | - Marcel G A van der Heijden
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, PO Box 800.56, 3508 TB, Utrecht, the Netherlands
- Plant-Soil Interactions, Department of Agroecology and Environment, Agroscope Reckenholz, Reckenholzstrasse 191, 8046, Zurich, Switzerland
- Department of Plant and Microbial Biology, University of Zürich, 8057, Zurich, Switzerland
| | - Corné M J Pieterse
- Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, PO Box 800.56, 3508 TB, Utrecht, the Netherlands
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Fernández J, del Valle Fernández I, Villar CJ, Lombó F. Combined laser and ozone therapy for onychomycosis in an in vitro and ex vivo model. PLoS One 2021; 16:e0253979. [PMID: 34191858 PMCID: PMC8244860 DOI: 10.1371/journal.pone.0253979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 06/17/2021] [Indexed: 02/07/2023] Open
Abstract
In order to develop a fast combined method for onychomycosis treatment using an in vitro and an ex vivo models, a combination of two dual-diode lasers at 405 nm and 639 nm wavelengths, in a continuous manner, together with different ozone concentrations (until 80 ppm), was used for performing the experiments on fungal strains growing on PDA agar medium or on pig’s hooves samples. In the in vitro model experiments, with 30 min combined treatment, all species are inhibited at 40 ppm ozone concentration, except S. brevicaulis, which didn’t show an inhibition in comparison with only ozone treatment. In the ex vivo model experiments, with the same duration and ozone concentration, A. chrysogenum and E. floccosum showed total inhibition; T. mentagrophytes and T. rubrum showed a 75% growth inhibition; M. canis showed a delay in sporulation; and S. brevicaulis and A. terreus did not show growth inhibition. This combined laser and ozone treatment may be developed as a fast therapy for human onychomycosis, as a potential alternative to the use of antifungal drugs with potential side effects and long duration treatments.
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Affiliation(s)
- Javier Fernández
- Departamento de Biología Funcional, Research Unit “Biotechnology in Nutraceuticals and Bioactive Compounds-BIONUC”, Área de Microbiología, Universidad de Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias, Oviedo, Spain
| | | | - Claudio J. Villar
- Departamento de Biología Funcional, Research Unit “Biotechnology in Nutraceuticals and Bioactive Compounds-BIONUC”, Área de Microbiología, Universidad de Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias, Oviedo, Spain
| | - Felipe Lombó
- Departamento de Biología Funcional, Research Unit “Biotechnology in Nutraceuticals and Bioactive Compounds-BIONUC”, Área de Microbiología, Universidad de Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias, Oviedo, Spain
- * E-mail:
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Hines S, van der Zwan T, Shiell K, Shotton K, Prithiviraj B. Alkaline extract of the seaweed Ascophyllum nodosum stimulates arbuscular mycorrhizal fungi and their endomycorrhization of plant roots. Sci Rep 2021; 11:13491. [PMID: 34188188 PMCID: PMC8241850 DOI: 10.1038/s41598-021-93035-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 06/16/2021] [Indexed: 02/06/2023] Open
Abstract
Ascophyllum nodosum extracts (ANE) are well-established plant biostimulants that improve stress tolerance and crop vigour, while also having been shown to stimulate soil microbes. The intersection of these two stimulatory activities, and how they combine to enhance plant health, however, remains poorly understood. In the present study, we aimed to evaluate: (1) the direct effect of ANE on the arbuscular mycorrhizal fungus Rhizophagus irregularis, and (2) whether ANE influences endomycorrhization in plants. ANE enhanced development of R. irregularis in vitro, showing greater spore germination, germ tube length, and hyphal branching. Greenhouse-grown Medicago truncatula drench-treated with ANE formed mycorrhizal associations faster (3.1-fold higher mycorrhization at week 4) and grew larger (29% greater leaf area by week 8) than control plants. Foliar applications of ANE also increased root colonization and arbuscular maturity, but did not appear to enhance plant growth. Nonetheless, following either foliar or drench application, M. truncatula genes associated with establishment of mycorrhizae were expressed at significantly higher levels compared to controls. These results suggest that ANE enhances mycorrhization through both direct stimulation of arbuscular mycorrhizal fungus growth and through stimulation of the plant's accommodation of the symbiont, together promoting the establishment of this agriculturally vital plant-microbe symbiosis.
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Affiliation(s)
- Sarah Hines
- Marine Bioproducts Research Laboratory, Department of Plant, Food and Environmental Sciences, Dalhousie University, Truro, NS, Canada
| | | | - Kevin Shiell
- Acadian Plant Health, Acadian Seaplants Ltd., Dartmouth, NS, Canada
| | - Katy Shotton
- Acadian Plant Health, Acadian Seaplants Ltd., Dartmouth, NS, Canada
| | - Balakrishnan Prithiviraj
- Marine Bioproducts Research Laboratory, Department of Plant, Food and Environmental Sciences, Dalhousie University, Truro, NS, Canada.
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He K, Zou J, Wang YX, Zhao CL, Ye JH, Zhang JJ, Pan LT, Zhang HJ. Rubesanolides F and G: Two Novel Lactone-Type Norditerpenoids from Isodon rubescens. Molecules 2021; 26:molecules26133865. [PMID: 34202760 PMCID: PMC8270274 DOI: 10.3390/molecules26133865] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 12/05/2022] Open
Abstract
A phytochemical investigation of the leaves of the medicinal plant Isodon rubescens led to the isolation of the two new degraded abietane lactone diterpenoids rubesanolides F (1) and G (2). Their structures were elucidated based on the analyses of the HRESIMS and 1D/2D NMR spectral data, and their absolute configurations were determined by ECD spectrum calculations and X-ray single crystal diffraction methods. Compounds 1 and 2, with a unique γ-lactone subgroup between C-8 and C-20, were found to form a carbonyl carbon at C-13 by removal of the isopropyl group in an abietane diterpene skeleton. Rubesanolide G (2) is a rare case of abietane that possesses a cis-fused configuration between rings B and C. The two isolates were evaluated for their biological activities against two cancer cell lines (A549 and HL60), three fungal strains (Candida alba, Aspergillus niger and Rhizopus nigricans) and three bacterial strains (Escherichia coli, Staphylococcus aureus and Bacillus subtilis).
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Affiliation(s)
- Kang He
- The Key Laboratory of Miao Medicine of Guizhou Province, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China; (K.H.); (J.Z.); (Y.-X.W.); (C.-L.Z.); (J.-H.Y.); (J.-J.Z.)
| | - Juan Zou
- The Key Laboratory of Miao Medicine of Guizhou Province, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China; (K.H.); (J.Z.); (Y.-X.W.); (C.-L.Z.); (J.-H.Y.); (J.-J.Z.)
| | - Yu-Xue Wang
- The Key Laboratory of Miao Medicine of Guizhou Province, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China; (K.H.); (J.Z.); (Y.-X.W.); (C.-L.Z.); (J.-H.Y.); (J.-J.Z.)
| | - Chen-Liang Zhao
- The Key Laboratory of Miao Medicine of Guizhou Province, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China; (K.H.); (J.Z.); (Y.-X.W.); (C.-L.Z.); (J.-H.Y.); (J.-J.Z.)
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong, China
| | - Jiang-Hai Ye
- The Key Laboratory of Miao Medicine of Guizhou Province, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China; (K.H.); (J.Z.); (Y.-X.W.); (C.-L.Z.); (J.-H.Y.); (J.-J.Z.)
| | - Jing-Jie Zhang
- The Key Laboratory of Miao Medicine of Guizhou Province, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China; (K.H.); (J.Z.); (Y.-X.W.); (C.-L.Z.); (J.-H.Y.); (J.-J.Z.)
| | - Lu-Tai Pan
- The Key Laboratory of Miao Medicine of Guizhou Province, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China; (K.H.); (J.Z.); (Y.-X.W.); (C.-L.Z.); (J.-H.Y.); (J.-J.Z.)
- Correspondence: (L.-T.P.); (H.-J.Z.)
| | - Hong-Jie Zhang
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong, China
- Correspondence: (L.-T.P.); (H.-J.Z.)
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Dzurendová S, Shapaval V, Tafintseva V, Kohler A, Byrtusová D, Szotkowski M, Márová I, Zimmermann B. Assessment of Biotechnologically Important Filamentous Fungal Biomass by Fourier Transform Raman Spectroscopy. Int J Mol Sci 2021; 22:6710. [PMID: 34201486 PMCID: PMC8269384 DOI: 10.3390/ijms22136710] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 12/11/2022] Open
Abstract
Oleaginous filamentous fungi can accumulate large amount of cellular lipids and biopolymers and pigments and potentially serve as a major source of biochemicals for food, feed, chemical, pharmaceutical, and transport industries. We assessed suitability of Fourier transform (FT) Raman spectroscopy for screening and process monitoring of filamentous fungi in biotechnology. Six Mucoromycota strains were cultivated in microbioreactors under six growth conditions (three phosphate concentrations in the presence and absence of calcium). FT-Raman and FT-infrared (FTIR) spectroscopic data was assessed in respect to reference analyses of lipids, phosphorus, and carotenoids by using principal component analysis (PCA), multiblock or consensus PCA, partial least square regression (PLSR), and analysis of spectral variation due to different design factors by an ANOVA model. All main chemical biomass constituents were detected by FT-Raman spectroscopy, including lipids, proteins, cell wall carbohydrates, and polyphosphates, and carotenoids. FT-Raman spectra clearly show the effect of growth conditions on fungal biomass. PLSR models with high coefficients of determination (0.83-0.94) and low error (approximately 8%) for quantitative determination of total lipids, phosphates, and carotenoids were established. FT-Raman spectroscopy showed great potential for chemical analysis of biomass of oleaginous filamentous fungi. The study demonstrates that FT-Raman and FTIR spectroscopies provide complementary information on main fungal biomass constituents.
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Affiliation(s)
- Simona Dzurendová
- Faculty of Science and Technology, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway; (S.D.); (V.S.); (V.T.); (A.K.); (D.B.)
| | - Volha Shapaval
- Faculty of Science and Technology, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway; (S.D.); (V.S.); (V.T.); (A.K.); (D.B.)
| | - Valeria Tafintseva
- Faculty of Science and Technology, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway; (S.D.); (V.S.); (V.T.); (A.K.); (D.B.)
| | - Achim Kohler
- Faculty of Science and Technology, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway; (S.D.); (V.S.); (V.T.); (A.K.); (D.B.)
| | - Dana Byrtusová
- Faculty of Science and Technology, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway; (S.D.); (V.S.); (V.T.); (A.K.); (D.B.)
- Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech Republic; (M.S.); (I.M.)
| | - Martin Szotkowski
- Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech Republic; (M.S.); (I.M.)
| | - Ivana Márová
- Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech Republic; (M.S.); (I.M.)
| | - Boris Zimmermann
- Faculty of Science and Technology, Norwegian University of Life Sciences, P.O. Box 5003, 1432 Ås, Norway; (S.D.); (V.S.); (V.T.); (A.K.); (D.B.)
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Zhao G, Dong F, Lao X, Zheng H. Strategies to Increase the Production of Biosynthetic Riboflavin. Mol Biotechnol 2021; 63:909-918. [PMID: 34156642 DOI: 10.1007/s12033-021-00318-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 03/20/2021] [Indexed: 12/29/2022]
Abstract
Riboflavin is widely regarded as an essential nutrient that is involved in biological oxidation in vivo. In addition to preventing and treating acyl-CoA dehydrogenase deficiency in patients with keratitis, stomatitis, and glossitis, riboflavin is also closely related to the treatment of radiation mucositis and cardiovascular disease. Chemical synthesis has been the dominant method for producing riboflavin for approximately 50 years. Nevertheless, due to the intricate synthesis process, relatively high cost, and high risk of pollution, alternative methods of chemical syntheses, such as the fermentation method, began to develop and eventually became the main methods for producing riboflavin. At present, there are three types of strains used in industrial riboflavin production: Ashbya gossypii, Candida famata, and Bacillus subtilis. Additionally, many recent studies have been conducted on Escherichia coli and Lactobacillus. Fermentation increases the yield of riboflavin using genetic engineering technology to modify and induce riboflavin production in the strain, as well as to regulate the metabolic flux of the purine pathway and pentose phosphate pathway (PP pathway), thereby optimizing the culture process. This article briefly introduces recent progress in the fermentation of riboflavin.
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Affiliation(s)
- Guiling Zhao
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Fanyi Dong
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Xingzhen Lao
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China.
| | - Heng Zheng
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China.
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Dopazo V, Luz C, Mañes J, Quiles JM, Carbonell R, Calpe J, Meca G. Bio-Preservative Potential of Microorganisms Isolated from Red Grape against Food Contaminant Fungi. Toxins (Basel) 2021; 13:toxins13060412. [PMID: 34200813 PMCID: PMC8230461 DOI: 10.3390/toxins13060412] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/31/2021] [Accepted: 06/09/2021] [Indexed: 11/16/2022] Open
Abstract
Fungal spoilage is one of the main reasons of economic losses in the food industry, especially in the wine sector. Consequently, the search for safer and new preservation techniques has gained importance in recent years. The objective of this study was to investigate the antifungal and anti-mycotoxigenic activity from 28 microorganisms (MO) isolated from red grape. The antifungal activity of a cell free supernatant of fermented medium by the isolated MO (CFS) was tested with the agar diffusion method and the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) assay. Additionally, different antifungal compounds from the CFS were identified and quantified (organic acids, phenolic compounds, and volatile organic compounds). Finally, the most active CFS were tested as red grape bio-preservative agents. Results evidenced that CFS fermented by the strain UTA 6 had the highest antifungal activity, above all isolates, and produced a wide pool of antifungal compounds. The use of UTA 6 CFS as bio-preservative agent showed a reduction of 0.4 and 0.6 log10 spores per gram of fruit in grapes contaminated by A. flavus and B. cinerea, respectively. Moreover, UTA 6 CFS treatment reduced the occurrence of aflatoxin B1 and fumonisin (B2, B3, and B4) production in grapes contaminated by 28-100%.
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Peng Q, Li Y, Deng L, Fang J, Yu X. High hydrostatic pressure shapes the development and production of secondary metabolites of Mariana Trench sediment fungi. Sci Rep 2021; 11:11436. [PMID: 34075128 PMCID: PMC8169743 DOI: 10.1038/s41598-021-90920-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 05/19/2021] [Indexed: 11/09/2022] Open
Abstract
The hadal biosphere is one of the least understood ecosystems on our planet. Recent studies have revealed diverse and active communities of prokaryotes in hadal sediment. However, there have been few studies on fungi in hadal sediment. Here we report the first isolation and cultivation of 8 fungi from the Mariana Trench sediment. The individual colonies were isolated and identified as Stemphylium sp., Cladosporium sp., Arthrinium sp., Fusarium sp., Alternaria sp., and Aspergillus sp. High hydrostatic pressure (HHP) test was carried out to identify the piezophily of these hadal fungi. Among them, 7 out of the 8 fungal isolates exhibited the ability of germination after incubation under 40 MPa for 7 days. Vegetative growth of the isolates was also affected by HHP. Characterization of secondary metabolites under different pressure conditions was also performed. The production of secondary metabolites was affected by the HHP treatment, improving the potential of discovering novel natural products from hadal fungi. The antibacterial assay revealed the potential of discovering novel natural products. Our results suggest that fungal growth pressure plays an important role in the development and production of secondary metabolites of these hadal fungi under the extreme environment in the Mariana Trench.
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Affiliation(s)
- Qingqing Peng
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Yongqi Li
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Ludan Deng
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Jiasong Fang
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Xi Yu
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China.
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Le TM, Huynh T, Bamou FZ, Szekeres A, Fülöp F, Szakonyi Z. Novel (+)-Neoisopulegol-Based O-Benzyl Derivatives as Antimicrobial Agents. Int J Mol Sci 2021; 22:5626. [PMID: 34073167 PMCID: PMC8198684 DOI: 10.3390/ijms22115626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/15/2021] [Accepted: 05/18/2021] [Indexed: 11/16/2022] Open
Abstract
Discovery of novel antibacterial agents with new structures, which combat pathogens is an urgent task. In this study, a new library of (+)-neoisopulegol-based O-benzyl derivatives of aminodiols and aminotriols was designed and synthesized, and their antimicrobial activity against different bacterial and fungal strains were evaluated. The results showed that this new series of synthetic O-benzyl compounds exhibit potent antimicrobial activity. Di-O-benzyl derivatives showed high activity against Gram-positive bacteria and fungi, but moderate activity against Gram-negative bacteria. Therefore, these compounds may serve a good basis for antibacterial and antifungal drug discovery. Structure-activity relationships were also studied from the aspects of stereochemistry of the O-benzyl group on cyclohexane ring and the substituent effects on the ring system.
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Affiliation(s)
- Tam Minh Le
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
- Stereochemistry Research Group of the Hungarian Academy of Sciences, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Thu Huynh
- Department of Microbiology, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary; (T.H.); (A.S.)
- Department of Biotecnology, Faculty of Chemical Engineering, Ho Chi Minh University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 72607, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 71351, Vietnam
| | - Fatima Zahra Bamou
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
| | - András Szekeres
- Department of Microbiology, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary; (T.H.); (A.S.)
- Interdisciplinary Centre of Natural Products, University of Szeged, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
- Stereochemistry Research Group of the Hungarian Academy of Sciences, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
- Interdisciplinary Centre of Natural Products, University of Szeged, Eötvös utca 6, H-6720 Szeged, Hungary
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Abstract
In this review, we chart the major milestones in the research progress on the DyP-type peroxidase family over the past decade. Though mainly distributed among bacteria and fungi, this family actually exhibits more widespread diversity. Advanced tertiary structural analyses have revealed common and different features among members of this family. Notably, the catalytic cycle for the peroxidase activity of DyP-type peroxidases appears to be different from that of other ubiquitous heme peroxidases. DyP-type peroxidases have also been reported to possess activities in addition to peroxidase function, including hydrolase or oxidase activity. They also show various cellular distributions, functioning not only inside cells but also outside of cells. Some are also cargo proteins of encapsulin. Unique, noteworthy functions include a key role in life-cycle switching in Streptomyces and the operation of an iron transport system in Staphylococcus aureus, Bacillus subtilis and Escherichia coli. We also present several probable physiological roles of DyP-type peroxidases that reflect the widespread distribution and function of these enzymes. Lignin degradation is the most common function attributed to DyP-type peroxidases, but their activity is not high compared with that of standard lignin-degrading enzymes. From an environmental standpoint, degradation of natural antifungal anthraquinone compounds is a specific focus of DyP-type peroxidase research. Considered in its totality, the DyP-type peroxidase family offers a rich source of diverse and attractive materials for research scientists.
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Affiliation(s)
- Yasushi Sugano
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women’s University, Tokyo 112-8681, Japan;
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Hao L, Zhang Z, Hao B, Diao F, Zhang J, Bao Z, Guo W. Arbuscular mycorrhizal fungi alter microbiome structure of rhizosphere soil to enhance maize tolerance to La. Ecotoxicol Environ Saf 2021; 212:111996. [PMID: 33545409 DOI: 10.1016/j.ecoenv.2021.111996] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/17/2021] [Accepted: 01/26/2021] [Indexed: 05/22/2023]
Abstract
Rhizosphere microbes are essential partners for plant stress tolerance. Recent studies indicate that arbuscular mycorrhizal fungi (AMF) can facilitate the revegetation of soils contaminated by heavy metals though interacting with rhizosphere microbiome. However, it is unclear how AMF affect rhizosphere microbiome to improve the growth of plant under rare earth elements (REEs) stress. AMF (Claroideoglomus etunicatum) was inoculated to maize grown in soils spiked with Lanthanum (0 mg kg-1, La0; 10 mg kg-1, La10; 100 mg kg-1, La100; 500 mg kg-1, La500). Plant biomass, nutrient uptake, REE uptake and rhizosphere bacterial and fungal community were evaluated. The results indicated that La100 and La500 decreased significantly root colonization rates and nutrition uptake (K, P, Ca and Mg content). La500 decreased significantly α-diversity indexes of bacterial and fungal community. AMF enhanced significantly the shoot and root fresh and dry weight of maize in all La treatments (except for the root fresh and dry weight of La0 and La10 treatment). For La100 and La500 treatments, AMF increased significantly nutrition uptake (K, P, Ca and Mg content) in shoot of maize by 27.40-441.77%. For La500 treatment, AMF decreased significantly shoot La concentration by 51.53% in maize, but increased significantly root La concentration by 30.45%. In addition, AMF decreased bacterial and fungal Shannon index in La0 treatment, but increased bacterial Shannon index in La500 treatment. Both AMF and La500 affected significantly the bacterial and fungal community composition, and AMF led to more influence than La. AMF promoted the enrichment of bacteria, including Planomicrobium, Lysobacter, Saccharothrix, Agrococcus, Microbacterium, Streptomyces, Penicillium and other unclassified genus, and fungi (Penicillium) in La500, which showed the function for promoting plant growth and tolerance of heavy metal. The study revealed that AMF can regulate the rhizosphere bacterial and fungal composition and foster certain beneficial microbes to enhance the tolerance of maize under La stress. Phytoremediation assisted by AMF is an attractive approach to ameliorate REEs-contaminated soils.
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Affiliation(s)
- Lijun Hao
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Zhechao Zhang
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Baihui Hao
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Fengwei Diao
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Jingxia Zhang
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Zhihua Bao
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Wei Guo
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Ministry of Education Key Laboratory of Ecology and Resource use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
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Górny RL, Gołofit-Szymczak M, Wójcik-Fatla A, Cyprowski M, Stobnicka-Kupiec A, Ławniczek-Wałczyk A. Microbial contamination of money sorting facilities. Ann Agric Environ Med 2021; 28:61-71. [PMID: 33775069 DOI: 10.26444/aaem/132321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
INTRODUCTION Money is the most common item with which we have daily contact. Circulated banknotes and coins can become microbiologically contaminated and act as both a source and a means of spreading such pollutants. MATERIAL AND METHODS The study was carried out in three money sorting facilities in Poland. Bioaerosol samples were collected using a 6-stage Andersen impactor, and microorganisms deposited on tabletop surfaces were sampled using the swab method. Bacterial and fungal concentrations were calculated and all isolated species were taxonomically identified. RESULTS The study confirmed that means of payment are active sources of microbial emission in money sorting facilities. The bioaerosol concentrations did not exceed the threshold limit values proposed for this type of office premises. It confirms that ventilation systems in these facilities worked efficiently, protecting them from the migration of microbial contaminants present in both indoor and outdoor (atmospheric) background air. On the other hand, the average concentrations of bacteria and fungi on tabletop surfaces in banknote and coin sorting rooms were above the proposed purity levels for indoor surfaces and should be treated as microbiologically contaminated. Microbiota isolated from the air and surfaces were very diverse and among those strains were bacterial and fungal pathogens that can pose a health threat to exposed individuals. CONCLUSIONS The results showed that employees in money sorting facilities were exposed to microorganisms that may contribute to the development of adverse health outcomes. To protect them, highly efficient hygienic measures should be introduced in this working environment, to prevent both unwanted pollution and subsequent secondary emission of microbial contaminants from sorted means of payment and tabletop surfaces.
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Affiliation(s)
- Rafał L Górny
- Central Institute for Labour Protection - National Research Institute (CIOP-PIB), Warsaw, Poland
| | | | | | - Marcin Cyprowski
- Central Institute for Labour Protection - National Research Institute (CIOP-PIB), Warsaw, Poland
| | - Agata Stobnicka-Kupiec
- Central Institute for Labour Protection - National Research Institute (CIOP-PIB), Warsaw, Poland
| | - Anna Ławniczek-Wałczyk
- Central Institute for Labour Protection - National Research Institute (CIOP-PIB), Warsaw, Poland
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Hernández-Díaz JA, Garza-García JJ, Zamudio-Ojeda A, León-Morales JM, López-Velázquez JC, García-Morales S. Plant-mediated synthesis of nanoparticles and their antimicrobial activity against phytopathogens. J Sci Food Agric 2021; 101:1270-1287. [PMID: 32869290 DOI: 10.1002/jsfa.10767] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 08/15/2020] [Accepted: 08/31/2020] [Indexed: 05/02/2023]
Abstract
Nanotechnology is an emerging science with a wide array of applications involving the synthesis and manipulation of materials with dimensions in the range of 1-100 nm. Nanotechnological applications include diverse fields such as pharmaceuticals, medicine, the environment, food processing and agriculture. Regarding the latter, applications are mainly focused on plant growth and crop protection against plagues and diseases. In recent years, the biogenic reduction of elements such as Ag, Au, Cu, Cd, Al, Se, Zn, Ce, Ti and Fe with plant extracts has become one of the most accepted techniques for obtaining nanoparticles (NPs), as it is considered an ecological and cost-effective process without the use of chemical contaminants. The objective of this work was to review NPs synthesized by green chemistry using vegetable extracts, as well as their use as antimicrobial agents against phytopathogenic fungi and bacteria. Given the need for alternatives to control and integrate management of phytopathogens, this review is relevant to agriculture, although this technology is barely exploited in this field. © 2020 Society of Chemical Industry.
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Affiliation(s)
- José A Hernández-Díaz
- Department of Plant Biotechnology, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Zapopan, Mexico
| | - Jorge Jo Garza-García
- Department of Plant Biotechnology, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Zapopan, Mexico
| | | | - Janet M León-Morales
- Department of Plant Biotechnology, CONACYT - Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Zapopan, Mexico
| | - Julio C López-Velázquez
- Department of Plant Biotechnology, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Zapopan, Mexico
| | - Soledad García-Morales
- Department of Plant Biotechnology, CONACYT - Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Zapopan, Mexico
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Dankwa AS, Machado RM, Perry JJ. Sanitizer efficacy in reducing microbial load on commercially grown hydroponic lettuce. J Sci Food Agric 2021; 101:1403-1410. [PMID: 32833277 DOI: 10.1002/jsfa.10753] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 06/18/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Most hydroponic lettuce growers harvest and package their marketable-size lettuces with an intact root ball. With a high microbial load on the peat moss substrate, there is a risk of microbial transfer onto the edible portion during packaging and throughout the product's shelf life. Since the produce is believed to have no contact with the substrate, no sanitizer wash is performed before packaging and storage. RESULTS Aerobic plate count (APC) results suggested that reduction in count was influenced by both sanitizer application and storage time. Peroxyacetic acid significantly reduced APC count on leaves, roots, and substrate, with a 1.8 log CFU g-1 initial reduction on the leaf. Fungi and APC levels increased with storage time, with the greatest APC increase in the roots. Leaves had the lowest coliform bacteria (CB), with chlorine slightly reducing CB count. Unlike APC, CB levels decreased during storage on the substrate and root samples. No Listeria positive was confirmed by agglutination test. Further evaluation of different commercial substrates reveals that Com4, a drier-compacted plug, had the least ability to support growth/survival of all microbial populations enumerated relative to the spongy, wet black plugs. CONCLUSION The ability of peat moss substrates to host microorganisms is influenced by the physical properties of the product. Sanitizer wash efficacy is dependent on the initial microbial load and the length of storage. Chlorine and peroxyacetic acid are effective in reducing microbial populations on the leaves of hydroponically grown lettuce without affecting visual quality during shelf life. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Adwoa S Dankwa
- School of Food and Agriculture, University of Maine, Orono, ME, USA
| | - Robson M Machado
- School of Food and Agriculture, University of Maine, Orono, ME, USA
- Cooperative Extension, University of Maine, Orono, ME, USA
| | - Jennifer J Perry
- School of Food and Agriculture, University of Maine, Orono, ME, USA
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Mims TS, Abdallah QA, Stewart JD, Watts SP, White CT, Rousselle TV, Gosain A, Bajwa A, Han JC, Willis KA, Pierre JF. The gut mycobiome of healthy mice is shaped by the environment and correlates with metabolic outcomes in response to diet. Commun Biol 2021; 4:281. [PMID: 33674757 PMCID: PMC7935979 DOI: 10.1038/s42003-021-01820-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 02/09/2021] [Indexed: 01/31/2023] Open
Abstract
As an active interface between the host and their diet, the gut microbiota influences host metabolic adaptation; however, the contributions of fungi have been overlooked. Here, we investigate whether variations in gut mycobiome abundance and composition correlate with key features of host metabolism. We obtained animals from four commercial sources in parallel to test if differing starting mycobiomes can shape host adaptation in response to processed diets. We show that the gut mycobiome of healthy mice is shaped by the environment, including diet, and significantly correlates with metabolic outcomes. We demonstrate that exposure to processed diet leads to persistent differences in fungal communities that significantly associate with differential deposition of body mass in male mice compared to mice fed standardized diet. Fat deposition in the liver, transcriptional adaptation of metabolically active tissues and serum metabolic biomarker levels are linked with alterations in fungal community diversity and composition. Specifically, variation in fungi from the genera Thermomyces and Saccharomyces most strongly associate with metabolic disturbance and weight gain. These data suggest that host-microbe metabolic interactions may be influenced by variability in the mycobiome. This work highlights the potential significance of the gut mycobiome in health and has implications for human and experimental metabolic studies.
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Affiliation(s)
- Tahliyah S Mims
- Department of Pediatrics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Qusai Al Abdallah
- Department of Pediatrics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Justin D Stewart
- Department of Geography and the Environment, Villanova University, Radnor, PA, USA
- Department of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Sydney P Watts
- Department of Pediatrics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Catrina T White
- Department of Pediatrics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Thomas V Rousselle
- Department of Surgery, Transplant Research Institute, James D. Eason Transplant Institute, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Ankush Gosain
- Division of Pediatric Surgery, Department of Surgery, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Amandeep Bajwa
- Department of Surgery, Transplant Research Institute, James D. Eason Transplant Institute, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Joan C Han
- Department of Pediatrics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
- Department of Physiology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA
| | - Kent A Willis
- Department of Pediatrics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA.
- Division of Neonatology, Department of Pediatrics, College of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Joseph F Pierre
- Department of Pediatrics, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA.
- Department of Microbiology, Immunology and Biochemistry, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, USA.
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Ragoubi C, Quintieri L, Greco D, Mehrez A, Maatouk I, D’Ascanio V, Landoulsi A, Avantaggiato G. Mycotoxin Removal by Lactobacillus spp. and Their Application in Animal Liquid Feed. Toxins (Basel) 2021; 13:toxins13030185. [PMID: 33801544 PMCID: PMC8000088 DOI: 10.3390/toxins13030185] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 11/16/2022] Open
Abstract
The removal of mycotoxins from contaminated feed using lactic acid bacteria (LAB) has been proposed as an inexpensive, safe, and promising mycotoxin decontamination strategy. In this study, viable and heat-inactivated L. acidophilus CIP 76.13T and L. delbrueckii subsp. bulgaricus CIP 101027T cells were investigated for their ability to remove aflatoxin B1 (AFB1), ochratoxin A (OTA), zearalenone (ZEA), and deoxynivalenol (DON) from MRS medium and PBS buffer over a 24 h period at 37 °C. LAB decontamination activity was also assessed in a ZEA-contaminated liquid feed (LF). Residual mycotoxin concentrations were determined by UHPLC-FLD/DAD analysis. In PBS, viable L. acidophilus CIP 76.13T and L. delbrueckii subsp. bulgaricus CIP 101027T cells removed up to 57% and 30% of ZEA and DON, respectively, while AFB1 and OTA reductions were lower than 15%. In MRS, 28% and 33% of ZEA and AFB1 were removed, respectively; OTA and DON reductions were small (≤15%). Regardless of the medium, heat-inactivated cells produced significantly lower mycotoxin reductions than those obtained with viable cells. An adsorption mechanism was suggested to explain the reductions in AFB1 and OTA, while biodegradation could be responsible for the removal of ZEA and DON. Both viable LAB strains reduced ZEA by 23% in contaminated LF after 48 h of incubation. These findings suggest that LAB strains of L. acidophilus CIP 76.13T and L. delbrueckii subsp. bulgaricus CIP 101027T may be applied in the feed industry to reduce mycotoxin contamination.
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Affiliation(s)
- Chaima Ragoubi
- Risques liés aux Stress Environnement aux, Lute et Prévention, Faculté des Sciences de Bizerte, Université de Carthage, Zarzouna 7021, Tunisia; (C.R.); (A.M.); (I.M.); (A.L.)
| | - Laura Quintieri
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (L.Q.); (D.G.); (V.D.)
| | - Donato Greco
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (L.Q.); (D.G.); (V.D.)
| | - Amel Mehrez
- Risques liés aux Stress Environnement aux, Lute et Prévention, Faculté des Sciences de Bizerte, Université de Carthage, Zarzouna 7021, Tunisia; (C.R.); (A.M.); (I.M.); (A.L.)
| | - Imed Maatouk
- Risques liés aux Stress Environnement aux, Lute et Prévention, Faculté des Sciences de Bizerte, Université de Carthage, Zarzouna 7021, Tunisia; (C.R.); (A.M.); (I.M.); (A.L.)
| | - Vito D’Ascanio
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (L.Q.); (D.G.); (V.D.)
| | - Ahmed Landoulsi
- Risques liés aux Stress Environnement aux, Lute et Prévention, Faculté des Sciences de Bizerte, Université de Carthage, Zarzouna 7021, Tunisia; (C.R.); (A.M.); (I.M.); (A.L.)
| | - Giuseppina Avantaggiato
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (L.Q.); (D.G.); (V.D.)
- Correspondence:
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Ghavam M, Manconi M, Manca ML, Bacchetta G. Extraction of essential oil from Dracocephalum kotschyi Boiss. (Lamiaceae), identification of two active compounds and evaluation of the antimicrobial properties. J Ethnopharmacol 2021; 267:113513. [PMID: 33172599 DOI: 10.1016/j.jep.2020.113513] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/17/2020] [Accepted: 10/20/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Dracocephalum kotschyi is a medicinal plant widely used in traditional medicine to treat pain, fever, inflammation, and seizures. AIM OF THE STUDY Due to the importance of this plant and the well-known antibacterial activity of essential oils, the aim of the present study was to investigate the composition of essential oil and evaluate the antimicrobial activity of its main active compounds. MATERIALS AND METHODS In order to test its possible application at industrial level the oil was extract from the cultivated and wild plants. The epigean parts were collected in June 2018 from the same region of Daran (Isfahan, Iran). The extraction of essential oil was carried out using a Clevenger apparatus. The composition of the essential oil was assayed by using a gas chromatography/mass spectroscopy apparatus (GC/MS). RESULTS Results showed that the predominant compounds of essential oil of cultivated plants were α-pinene (13.66%), (E)-citral (12.89%), neral (11.25%), methyl geranate (8.66%), limonene (8.33%), campholenal (6.22%) and geraniol (5.69%), while those found in naturally grown plants were two main compounds: cyclohexylallene (52.63%) and limonene (35.88%). The antimicrobial properties of the plant were determined against 12 strains of microorganism by evaluating inhibition halo, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The highest inhibition halo for both oils from cultivated and wild plants was obtained against Aspergillus brasiliensis. The MIC value against Gram-positive Bacillus subtilis was 31.25 μg/ml, it was the lowest value provided by the essential oil obtained from the cultivated sample, the MIC was significantly lower than that obtained by treating the same strain with Rifampin. On the other hand, Candida albicans had the highest sensitivity (MIC value of 31.25 μg/ml) for the essential oil obtained from wild plants as the inhibitory concentration was lower than that obtained treating the yeast with Nystatin. CONCLUSIONS Therefore, according to the results of the present study, the use of the essential oil obtained from D. kotschyi can be used to protect food and to treat microbial infections.
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Affiliation(s)
- Mansureh Ghavam
- Department of Range and Watershed Management, Faculty of Natural Resources and Earth Sciences, University of Kashan, Kashan, Iran.
| | - Maria Manconi
- Department Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
| | - Maria Letizia Manca
- Department Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
| | - Gianluigi Bacchetta
- Department Life and Environmental Sciences, University of Cagliari, Cagliari, Italy; Hortus Botanicus Karalitanus (HBK), University of Cagliari, Italy
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47
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Střelková T, Nemes B, Kovács A, Novotný D, Božik M, Klouček P. Inhibition of Fungal Strains Isolated from Cereal Grains via Vapor Phase of Essential Oils. Molecules 2021; 26:1313. [PMID: 33804452 PMCID: PMC7957489 DOI: 10.3390/molecules26051313] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/22/2021] [Accepted: 02/24/2021] [Indexed: 11/17/2022] Open
Abstract
Fungal contamination in stored food grains is a global concern and affects food economics and human and animal health. It is clear that there is a need to develop new technologies with improved performances that are also eco-friendly in nature. Due to the bioactivity of essential oils (EOs) in the vapor phase, their low toxicity for humans, and their biodegradability and antifungal properties, EOs could be a suitable solution. In this study, we explored the potential of thyme, oregano, lemongrass, clove, and cajeput EOs in the vapor phase. For 17 days, inhibitory activity was assessed against five strains of postharvest pathogens-Aspergillus spp., Fusarium s. l. spp., and Penicilliumochrochloron-isolated from cereal grains. A modified disc volatilization method was used, which is more effective in comparison to traditional screening methods. Three concentrations were tested (250, 125, and 62.5 μL/L). The two highest concentrations resulted in complete inhibition of fungal growth; however, even 62.5 μL/L showed a significant antifungal effect. The efficiency of EOs followed this order: thyme > oregano > lemongrass > clove > cajeput. From our findings, it appears that the use of EOs vapors is a better option not only for laboratory experiments, but for subsequent practice.
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Affiliation(s)
- Tereza Střelková
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic; (T.S.); (B.N.); (A.K.); (M.B.)
| | - Bence Nemes
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic; (T.S.); (B.N.); (A.K.); (M.B.)
| | - Anett Kovács
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic; (T.S.); (B.N.); (A.K.); (M.B.)
| | - David Novotný
- Department of Ecology and Diagnostics of Fungal Pathogens, Crop Research Institute, Drnovská 507/73, 16106 Prague, Czech Republic;
| | - Matěj Božik
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic; (T.S.); (B.N.); (A.K.); (M.B.)
| | - Pavel Klouček
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic; (T.S.); (B.N.); (A.K.); (M.B.)
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48
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Gao B, Zhang X, Schnabl B. Fungi-Bacteria Correlation in Alcoholic Hepatitis Patients. Toxins (Basel) 2021; 13:toxins13020143. [PMID: 33672887 PMCID: PMC7917833 DOI: 10.3390/toxins13020143] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/27/2021] [Accepted: 02/10/2021] [Indexed: 12/13/2022] Open
Abstract
Alcohol-related liver disease is one of the most prevalent types of chronic liver diseases globally. Alcohol-related liver disease begins with fatty liver, which further develops into hepatic inflammation, hepatocyte injury, and progresses to fibrosis and cirrhosis. Compositional changes of gut bacteria and fungi were found in patients with alcohol-related liver disease. However, the functional changes of fungi and correlations between fungi and bacteria have not been investigated. In this study, we first examined the functional capacity of fungi in patients with alcohol-related liver disease using shotgun metagenomics. Among 24 MetaCyc pathways contributed by fungi, superpathway of allantoin degradation in yeast was enriched in patients with alcoholic hepatitis. Furthermore, we compared the predictive power of bacteria versus fungi and found that bacteria performed better than fungi to separate patients with alcoholic hepatitis from non-alcoholic controls and patients with alcohol use disorder. Finally, we investigated the associations between the intestinal fungi and bacteria in alcoholic hepatitis patients. Positive association between fungi and bacteria was found between Cladosporium and Gemmiger, meanwhile negative association was found between Cryptococcus and Pseudomonas in alcoholic hepatitis patients.
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Affiliation(s)
- Bei Gao
- School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China;
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Xinlian Zhang
- Division of Biostatistics and Bioinformatics, Department of Family Medicine and Public Health, University of California San Diego, San Diego, CA 92093, USA;
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, CA 92161, USA
- Correspondence: ; Tel.: +1-858-822-5311
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Li L, Zou J, Xu C, You S, Li Y, Wang Q. Synthesis and Anti-Tobacco Mosaic Virus/Fungicidal/Insecticidal/Antitumor Bioactivities of Natural Product Hemigossypol and Its Derivatives. J Agric Food Chem 2021; 69:1224-1233. [PMID: 33480687 DOI: 10.1021/acs.jafc.0c06058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
To further study the structure-activity relationship of gossypol, hemigossypol (1) and its derivatives (2-23) were successfully designed via structure simplification and chemically synthesized. The anti-tobacco mosaic virus (TMV), fungicidal, and insecticidal activities of them were tested systematically. Most of these derivatives exhibited excellent anti-TMV activity. Furthermore, these compounds also exhibited broad-spectrum fungicidal activities against 14 kinds of phytopathogenic fungi. In particular, hemigossypol acid lactone (7) was stable in the air. In terms of biological activity, it not only showed anti-TMV activity (inhibitory rates of 70.3, 65.4 and 72.4% at 500 μg/mL for inactivation, curative, and protection activity in vivo, respectively) comparable to ningnanmycin but also exhibited higher insecticidal activity against mosquito larvae (60%/0.25 mg/kg) than the commercial species rotenone. None of hemigossypol and the tested derivatives showed antitumor activities.
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Affiliation(s)
- Ling Li
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, Jiangxi 330096, People's Republic of China
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Jiyong Zou
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, Jiangxi 330096, People's Republic of China
| | - Changjiang Xu
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, Jiangxi 330096, People's Republic of China
| | - Shengyong You
- Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, Jiangxi 330096, People's Republic of China
| | - Yongqiang Li
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
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50
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González-Dominici LI, Saati-Santamaría Z, García-Fraile P. Genome Analysis and Genomic Comparison of the Novel Species Arthrobacter ipsi Reveal Its Potential Protective Role in Its Bark Beetle Host. Microb Ecol 2021; 81:471-482. [PMID: 32901388 DOI: 10.1007/s00248-020-01593-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 08/30/2020] [Indexed: 06/11/2023]
Abstract
The pine engraver beetle, Ips acuminatus Gyll, is a bark beetle that causes important damages in Scots pine (Pinus sylvestris) forests and plantations. As almost all higher organisms, Ips acuminatus harbours a microbiome, although the role of most members of its microbiome is not well understood. As part of a work in which we analysed the bacterial diversity associated to Ips acuminatus, we isolated the strain Arthrobacter sp. IA7. In order to study its potential role within the bark beetle holobiont, we sequenced and explored its genome and performed a pan-genome analysis of the genus Arthrobacter, showing specific genes of strain IA7 that might be related with its particular role in its niche. Based on these investigations, we suggest several potential roles of the bacterium within the beetle. Analysis of genes related to secondary metabolism indicated potential antifungal capability, confirmed by the inhibition of several entomopathogenic fungal strains (Metarhizium anisopliae CCF0966, Lecanicillium muscarium CCF6041, L. muscarium CCF3297, Isaria fumosorosea CCF4401, I. farinosa CCF4808, Beauveria bassiana CCF4422 and B. brongniartii CCF1547). Phylogenetic analyses of the 16S rRNA gene, six concatenated housekeeping genes (tuf-secY-rpoB-recA-fusA-atpD) and genome sequences indicated that strain IA7 is closely related to A. globiformis NBRC 12137T but forms a new species within the genus Arthrobacter; this was confirmed by digital DNA-DNA hybridization (37.10%) and average nucleotide identity (ANIb) (88.9%). Based on phenotypic and genotypic features, we propose strain IA7T as the novel species Arthrobacter ipsi sp. nov. (type strain IA7T = CECT 30100T = LMG 31782T) and suggest its protective role for its host.
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Affiliation(s)
- Lihuén Iraí González-Dominici
- Microbiology and Genetics Department, University of Salamanca, Salamanca, Spain
- Spanish-Portuguese Institute for Agricultural Research (CIALE), Villamayor, Salamanca, Spain
| | - Zaki Saati-Santamaría
- Microbiology and Genetics Department, University of Salamanca, Salamanca, Spain
- Spanish-Portuguese Institute for Agricultural Research (CIALE), Villamayor, Salamanca, Spain
| | - Paula García-Fraile
- Microbiology and Genetics Department, University of Salamanca, Salamanca, Spain.
- Spanish-Portuguese Institute for Agricultural Research (CIALE), Villamayor, Salamanca, Spain.
- Institute of Microbiology of the Czech Academy of Sciences, Prague, Czech Republic.
- Associated R&D Unit, USAL-CSIC (IRNASA), Salamanca, Spain.
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