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Kortei NK, Odamtten GT, Obodai M, Wiafe-Kwagyan M. Mycofloral profile and the radiation sensitivity (D10 values) of solar dried and gamma irradiated Pleurotus ostreatus (Jacq.Ex. Fr.) Kummer fruitbodies stored in two different packaging materials. Food Sci Nutr 2017; 6:180-188. [PMID: 29387377 PMCID: PMC5778233 DOI: 10.1002/fsn3.545] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 08/10/2017] [Accepted: 09/12/2017] [Indexed: 11/08/2022] Open
Abstract
The presence of fungi in our foods poses serious health risks as some genera of fungi may produce certain mycotoxins which have carcinogenic, mutagenic, teratogenic, and immunosuppressive effect on humans and animals alike. Fruitbodies of Pleurotus ostreatus were solar dried at a moisture content of 12.5 ± 0.2% and stored in polythene and polypropylene packs, gamma irradiated at doses of 0 (control), 1, 2, 3, 4, and 5 kGy at a dose rate of 1.7 kGy/hr from a Cobalt 60 source (SLL, 515, Hungary) and stored at room temperature 28-30°C for a period of 12 months. Mycological analyses were done at intervals of 0, 3, 6, and 12 months. A total of eleven (11) fungi belonging to eight fungal genera were isolated on both Cooke's and DRBC media; Aspergillus (A. niger, A. flavus, A. fumigatus, A. tamarii), Rhizopus (R. oligosporus), Mucor (M. racemosus), Fusarium (F. oxysporum), Penicillium (Penicillium sp.), Trichoderma (T. viride), and Rhodotorula sp. were recorded. There was a significant (p < .05) reduction in initial mycofloral population by an average of 2.2 log cycles as well as in species numbers with increasing doses of radiation. Radiation sensitivity (D10 values) also ranged between 1.68-2.78 kGy. Gamma irradiation treatment is one way which can enhance food safety through the reduction in potential pathogens and has been recommended as part of a comprehensive program to enhance food safety.
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Affiliation(s)
- Nii Korley Kortei
- Department of Nutrition and Dietetics School of Allied Health Sciences University of Health and Allied Sciences Ho Ghana
| | - George Tawia Odamtten
- Department of Plant and Environmental Biology College of Basic and Applied Sciences University of Ghana Legon Ghana
| | - Mary Obodai
- Food Microbiology Division Council for Scientific and Industrial Research- Food Research Institute Accra Ghana
| | - Michael Wiafe-Kwagyan
- Department of Plant and Environmental Biology College of Basic and Applied Sciences University of Ghana Legon Ghana
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Roy M, Vasco-Palacios A, Geml J, Buyck B, Delgat L, Giachini A, Grebenc T, Harrower E, Kuhar F, Magnago A, Rinaldi AC, Schimann H, Selosse MA, Sulzbacher MA, Wartchow F, Neves MA. The (re)discovery of ectomycorrhizal symbioses in Neotropical ecosystems sketched in Florianópolis. New Phytol 2017; 214:920-923. [PMID: 28397362 DOI: 10.1111/nph.14531] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Mélanie Roy
- Laboratoire Evolution et Diversité Biologique, Université Paul Sabatier - CNRS, UMR5174 UPS CNRS ENFA IRD, 118 route de Narbonne, 31062, Toulouse cedex, France
| | - Aida Vasco-Palacios
- Fundación Biodiversa Colombia, Bogotá, Colombia
- TEHO University of Antioquia, Medellín, 111311, Colombia
| | - József Geml
- Naturalis Biodiversity Center, PO Box 9517, 2300 RA, Leiden, the Netherlands
| | - Bart Buyck
- Muséum National d'Histoire Naturelle, Département Systématique et Evolution, CP 39, ISYEB, UMR 7205 CNRS MNHN UPMC EPHE, 12 Rue Buffon, F-75005, Paris, France
| | - Lynn Delgat
- Department of Biology, Ghent University, K.L. Ledeganckstraat 35, L10, 9000, Gent, Belgium
| | - Admir Giachini
- Universidade Federal de Santa Catarina, Florianopolis, Santa Catarina, 88040-900, Brazil
| | - Tine Grebenc
- Slovenian Forestry Institute, Večna pot 2, 1000, Ljubljana, Slovenia
| | - Emma Harrower
- University of Tennessee, 569 Dabney Hall, Knoxville, TN, 37996, USA
| | - Francisco Kuhar
- Centro de Investigación y Extensión Forestal Andino Patagónico - CONICET, Esquel, 9200, Argentina
| | - Altielys Magnago
- Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90040-060, Brazil
| | - Andrea C Rinaldi
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, I-09042, Monserrato (CA), Italy
| | - Heidy Schimann
- INRA UMR Ecology of Guiana Forests (AgroParisTech, CNRS, CIRAD, Université des Antilles, Université de la Guyane), F-97310, Kourou, Guyane, France
| | - Marc-André Selosse
- Muséum National d'Histoire Naturelle, Département Systématique et Evolution, CP 39, ISYEB, UMR 7205 CNRS MNHN UPMC EPHE, 12 Rue Buffon, F-75005, Paris, France
| | - Marcelo Aloisio Sulzbacher
- Departamento de Solos, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
| | - Felipe Wartchow
- Departamento de Sistemática e Ecologia/CCEN, Laboratório de Morfo-Taxonomia Fúngica, Universidade Federal da Paraíba, 58051-900, João Pessoa, Paraíba, Brazil
| | - Maria-Alice Neves
- Universidade Federal de Santa Catarina, Florianopolis, Santa Catarina, 88040-900, Brazil
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