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Miché L, Dries A, Ammar IB, Davidson S, Cagnacci L, Combet-Blanc Y, Abecassis V, Penton Fernandez G, Christen P. Changes in chemical properties and microbial communities' composition of a forest litter-based biofertilizer produced through aerated solid-state culture under different oxygen conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33629-8. [PMID: 38755473 DOI: 10.1007/s11356-024-33629-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 05/06/2024] [Indexed: 05/18/2024]
Abstract
Fermented forest litter (FFL) is a bioproduct used as biofertilizer for several decades in Eastern Asia and Latin America. It is locally handcrafted by farmers in anaerobic conditions by fermenting forest litter added with agricultural by-products such as whey, cereal bran, and molasses. The aim of this study was to characterize the FFL process and product through gas and liquid chromatography analyses. It also provides some highlights on the influence of O2 on this solid-state culture. Under anoxic condition, a maximum CO2 production rate (CDPR) of 0.41 mL/h∙g dry matter (dm) was reached after 8 days. The main volatile organic compounds (VOCs) were ethanol and ethyl acetate, with a production rate profile similar to CDPR. After 21 days of culture, no residual sucrose nor lactose was detected. Lactic and acetic acids reached 58.8 mg/g dm and 10.2 mg/g dm, respectively, ensuring the acidification of the matrix to a final pH of 4.72. A metabarcoding analysis revealed that heterolactic acid bacteria (Lentilactobacillus, Leuconostoc), homolactic acid bacteria (Lactococcus), and yeasts (Saccharomyces, Clavispora) were predominant. Predicted genes in the microbiome confirmed the potential link between detected bacteria and acids and VOCs produced. When O2 was fed to the cultures, final pH reached values up to 8.5. No significant amounts of lactic nor acetic acid were found. In addition, a strong shift in microbial communities was observed, with a predominance of Proteobacteria and molds, among which are potential pathogens like Fusarium species. This suggests that particular care must be brought to maintain anoxic conditions throughout the process.
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Affiliation(s)
- Lucie Miché
- IMBE, Aix Marseille Univ, Avignon Univ, CNRS, Marseille, IRD, France
| | - Alizée Dries
- IMBE, Aix Marseille Univ, Avignon Univ, CNRS, Marseille, IRD, France
| | - Inès Ben Ammar
- IMBE, Aix Marseille Univ, Avignon Univ, CNRS, Marseille, IRD, France
| | - Sylvain Davidson
- MIO, Aix Marseille Univ, Univ Toulon, CNRS, Marseille, IRD, France
| | - Loris Cagnacci
- IMBE, Aix Marseille Univ, Avignon Univ, CNRS, Marseille, IRD, France
| | | | | | | | - Pierre Christen
- IMBE, Aix Marseille Univ, Avignon Univ, CNRS, Marseille, IRD, France.
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Maciag T, Kozieł E, Rusin P, Otulak-Kozieł K, Jafra S, Czajkowski R. Microbial Consortia for Plant Protection against Diseases: More than the Sum of Its Parts. Int J Mol Sci 2023; 24:12227. [PMID: 37569603 PMCID: PMC10418420 DOI: 10.3390/ijms241512227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
Biological plant protection presents a promising and exciting alternative to chemical methods for safeguarding plants against the increasing threats posed by plant diseases. This approach revolves around the utilization of biological control agents (BCAs) to suppress the activity of significant plant pathogens. Microbial BCAs have the potential to effectively manage crop disease development by interacting with pathogens or plant hosts, thereby increasing their resistance. However, the current efficacy of biological methods remains unsatisfactory, creating new research opportunities for sustainable plant cultivation management. In this context, microbial consortia, comprising multiple microorganisms with diverse mechanisms of action, hold promise in terms of augmenting the magnitude and stability of the overall antipathogen effect. Despite scientific efforts to identify or construct microbial consortia that can aid in safeguarding vital crops, only a limited number of microbial consortia-based biocontrol formulations are currently available. Therefore, this article aims to present a complex analysis of the microbial consortia-based biocontrol status and explore potential future directions for biological plant protection research with new technological advancements.
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Affiliation(s)
- Tomasz Maciag
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences—SGGW, Nowoursynowska Street 159, 02-776 Warsaw, Poland
| | - Edmund Kozieł
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences—SGGW, Nowoursynowska Street 159, 02-776 Warsaw, Poland
| | - Piotr Rusin
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences—SGGW, Nowoursynowska Street 159, 02-776 Warsaw, Poland
| | - Katarzyna Otulak-Kozieł
- Department of Botany, Institute of Biology, Warsaw University of Life Sciences—SGGW, Nowoursynowska Street 159, 02-776 Warsaw, Poland
| | - Sylwia Jafra
- Division of Biological Plant Protection, Intercollegiate Faculty of Biotechnology UG and MUG, University of Gdansk, Antoniego Abrahama Street 58, 80-307 Gdansk, Poland
| | - Robert Czajkowski
- Laboratory of Biologically Active Compounds, Intercollegiate Faculty of Biotechnology UG and MUG, University of Gdansk, Antoniego Abrahama Street 58, 80-307 Gdansk, Poland
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Crabtree AM, Taggart NT, Lee MD, Boyer JM, Rowley PA. The prevalence of killer yeasts and double-stranded RNAs in the budding yeast Saccharomyces cerevisiae. FEMS Yeast Res 2023; 23:foad046. [PMID: 37935474 PMCID: PMC10664976 DOI: 10.1093/femsyr/foad046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 10/23/2023] [Accepted: 11/02/2023] [Indexed: 11/09/2023] Open
Abstract
Killer toxins are antifungal proteins produced by many species of "killer" yeasts, including the brewer's and baker's yeast Saccharomyces cerevisiae. Screening 1270 strains of S. cerevisiae for killer toxin production found that 50% are killer yeasts, with a higher prevalence of yeasts isolated from human clinical samples and winemaking processes. Since many killer toxins are encoded by satellite double-stranded RNAs (dsRNAs) associated with mycoviruses, S. cerevisiae strains were also assayed for the presence of dsRNAs. This screen identified that 51% of strains contained dsRNAs from the mycovirus families Totiviridae and Partitiviridae, as well as satellite dsRNAs. Killer toxin production was correlated with the presence of satellite dsRNAs but not mycoviruses. However, in most killer yeasts, whole genome analysis identified the killer toxin gene KHS1 as significantly associated with killer toxin production. Most killer yeasts had unique spectrums of antifungal activities compared to canonical killer toxins, and sequence analysis identified mutations that altered their antifungal activities. The prevalence of mycoviruses and killer toxins in S. cerevisiae is important because of their known impact on yeast fitness, with implications for academic research and industrial application of this yeast species.
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Affiliation(s)
- Angela M Crabtree
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, United States
| | - Nathan T Taggart
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, United States
| | - Mark D Lee
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, United States
| | - Josie M Boyer
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, United States
| | - Paul A Rowley
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, United States
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γ-Cyclodextrin-Encapsulated Cinnamaldehyde for Citrus Preservation and Its Potential Mechanisms against Penicillium digitatum. J Fungi (Basel) 2022; 8:jof8111199. [DOI: 10.3390/jof8111199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/07/2022] [Accepted: 11/12/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, a γ-cyclodextrin-cinnamaldehyde inclusion compound (γ-CDCL) was prepared to control green mold caused by Penicillium digitatum (P. digitatum) in citrus. The results showed that the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of γ-CDCL against the mycelial growth of P. digitatum were 2.0 g L−1 and 4.0 g L−1, respectively. Simultaneously, eight × MFC γ-CDCL could effectively reduce the incidence of green mold in citrus fruit without impairment of the fruit qualities, meanwhile, eight × MFC γ-CDCL was comparable to Prochloraz in controlling fruit under natural storage conditions. The structure of γ-CDCL was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), and nuclear magnetic resonance (NMR) analyses. Results showed that the successful preparation of γ-CDCL was due to the spatial interaction between H-4,8 of cinnamaldehyde and H-5′ of γ-cyclodextrin. Meanwhile, the cell membrane permeability of P. digitatum was impaired by γ-CDCL through massive accumulation of reactive oxygen species, whereas the cell wall integrity was barely affected. These results indicated that γ-CDCL might inhibit the growth of P. digitatum through a membrane damage mechanism and it is a promising alternative to chemical fungicides in controlling the post-harvest citrus decay.
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Metabolite profiling reveals comprehensive effects of Chaetomium globosum on citrus preservation. Food Chem 2022; 369:130959. [PMID: 34469836 DOI: 10.1016/j.foodchem.2021.130959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 08/22/2021] [Accepted: 08/23/2021] [Indexed: 11/23/2022]
Abstract
The huge economic loss of citrus fruit after harvest called for safe and efficient preservatives, as chemically synthesized agents threatened the environment and human health. Herein a biocontrol fungus Chaetomium globosum QY-1 near the orchard in riparian area was identified to have antimicrobial, antioxidant and tyrosinase inhibition activity, which meets the requirements of an ideal preservative. Metabolite profiling based on bioassay-guided fractionation was carried out, and eight polyketones were determined by MS and NMR. The most abundant CheA exhibited strong inhibition to Penicillium digitatum, the main pathogen caused citrus fruit rot. Among these metabolites, Epicoccone and Epicoccolide B showed higher antioxidant activity, while Epicoccone and CheA had higher tyrosinase inhibitory activity. All the activities were close to or even better than the positive control (Vc; glutathione; Vc and arbutin; Bellkute), implying that the metabolites of C. globosum had comprehensive effects as natural preservatives.
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Li H, James A, Shen X, Wang Y. Roles of microbiota in the formation of botrytized grapes and wines. CYTA - JOURNAL OF FOOD 2021. [DOI: 10.1080/19476337.2021.1958925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Hua Li
- Beijing Advanced Innovation Center For Food Nutrition And Human Health, Beijing Technology & Business University (BTBU), Beijing, P.R. China
| | - Armachius James
- Beijing Advanced Innovation Center For Food Nutrition And Human Health, Beijing Technology & Business University (BTBU), Beijing, P.R. China
| | - Xuemei Shen
- Beijing Advanced Innovation Center For Food Nutrition And Human Health, Beijing Technology & Business University (BTBU), Beijing, P.R. China
| | - Yousheng Wang
- Beijing Advanced Innovation Center For Food Nutrition And Human Health, Beijing Technology & Business University (BTBU), Beijing, P.R. China
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Biocontrol Activity of Aureubasidium pullulans and Candida orthopsilosis Isolated from Tectona grandis L. Phylloplane against Aspergillus sp. in Post-Harvested Citrus Fruit. SUSTAINABILITY 2021. [DOI: 10.3390/su13137479] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study aimed to isolate and identify moulds from rotten Citrus sinensis post-harvests and to investigate the activity of antagonist and biocontrol activity moulds that cause citrus fruit rotting. A total of 12 mould isolates were obtained. Following the pathogenicity test, two representative mould isolates were selected and identified based on the sequence analyses of internal transcribed spacer (ITS) regions of the rDNA. Methods used in this study include isolation of fungal postharvest diseases, pathogenicity assay, antagonism assay, growth curve analysis, in vitro biocontrol assay, and molecular phylogenetic analysis. Two isolates of fungal postharvest diseases were determined as the most destructive pathogens. The biocontrol assay showed that isolates of Y1 and Y10 were capable to reduce the growth of fungal isolates K6 and K9 and mitigate up to 100% of the damage of sweet citrus fruits after 7 days of incubation. The moulds were identified as K6 (Aspergillus flavus sensu lato) and K9 (Aspergillus niger sensu lato). Phylogenetic analysis showed that the Y10 yeast isolate was identified as Candida orthopsilosis, whereas the Y1 isolate had a close genetic relationship with Aureobasidium pullulans and possibly belongs to a new species. Further analysis is necessary to confirm this finding.
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Díaz MA, Pereyra MM, Picón-Montenegro E, Meinhardt F, Dib JR. Killer Yeasts for the Biological Control of Postharvest Fungal Crop Diseases. Microorganisms 2020; 8:microorganisms8111680. [PMID: 33138117 PMCID: PMC7693540 DOI: 10.3390/microorganisms8111680] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 10/25/2020] [Accepted: 10/27/2020] [Indexed: 01/14/2023] Open
Abstract
Every year and all over the world the fungal decay of fresh fruit and vegetables frequently generates substantial economic losses. Synthetic fungicides, traditionally used to efficiently combat the putrefactive agents, emerged, however, as the cause of environmental and human health issues. Given the need to seek for alternatives, several biological approaches were followed, among which those with killer yeasts stand out. Here, after the elaboration of the complex of problems, we explain the hitherto known yeast killer mechanisms and present the implementation of yeasts displaying such phenotype in biocontrol strategies for pre- or postharvest treatments to be aimed at combating postharvest fungal decay in numerous agricultural products.
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Affiliation(s)
- Mariana Andrea Díaz
- Planta Piloto de Procesos Industriales Microbiológicos–CONICET, Av. Belgrano y Pje. Caseros, Tucumán 4000, Argentina; (M.A.D.); (M.M.P.); (E.P.-M.)
| | - Martina María Pereyra
- Planta Piloto de Procesos Industriales Microbiológicos–CONICET, Av. Belgrano y Pje. Caseros, Tucumán 4000, Argentina; (M.A.D.); (M.M.P.); (E.P.-M.)
| | - Ernesto Picón-Montenegro
- Planta Piloto de Procesos Industriales Microbiológicos–CONICET, Av. Belgrano y Pje. Caseros, Tucumán 4000, Argentina; (M.A.D.); (M.M.P.); (E.P.-M.)
| | - Friedhelm Meinhardt
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms Universität Münster, Corrensstr. 3, 48149 Münster, Germany
- Correspondence: (F.M.); (J.R.D.); Tel.: +49-251-83-39819 (F.M.); +54-381-4344888 (J.R.D.)
| | - Julián Rafael Dib
- Planta Piloto de Procesos Industriales Microbiológicos–CONICET, Av. Belgrano y Pje. Caseros, Tucumán 4000, Argentina; (M.A.D.); (M.M.P.); (E.P.-M.)
- Instituto de Microbiología, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, Tucumán 4000, Argentina
- Correspondence: (F.M.); (J.R.D.); Tel.: +49-251-83-39819 (F.M.); +54-381-4344888 (J.R.D.)
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