51
|
Sajjad W, Rafiq M, Din G, Hasan F, Iqbal A, Zada S, Ali B, Hayat M, Irfan M, Kang S. Resurrection of inactive microbes and resistome present in the natural frozen world: Reality or myth? THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 735:139275. [PMID: 32480145 DOI: 10.1016/j.scitotenv.2020.139275] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/05/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
The present world faces a new threat of ancient microbes and resistomes that are locked in the cryosphere and now releasing upon thawing due to climate change and anthropogenic activities. The cryosphere act as the best preserving place for these microbes and resistomes that stay alive for millions of years. Current reviews extensively discussed whether the resurrection of microbes and resistomes existing in these pristine environments is true or just a hype. Release of these ancient microorganisms and naked DNA is of great concern for society as these microbes can either cause infections directly or they can interact with contemporary microorganisms and affect their fitness, survival, and mutation rate. Moreover, the contemporary microorganisms may uptake the unlocked naked DNA, which might transform non-pathogenic microorganisms into deadly antibiotic-resistant microbes. Additionally, the resurrection of glacial microorganisms can cause adverse effects on ecosystems downstream. The release of glacial pathogens and naked DNA is real and can lead to fatal outbreaks; therefore, we must prepare ourselves for the possible reemergence of diseases caused by these microbes. This study provides a scientific base for the adoption of actions by international cooperation to develop preventive measures.
Collapse
Affiliation(s)
- Wasim Sajjad
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Muhammad Rafiq
- Department of Microbiology, Faculty of Life Sciences and Informatics, Balochistan University of IT, Engineering and Management Sciences, Quetta, Pakistan
| | - Ghufranud Din
- Department of Microbiology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Fariha Hasan
- Department of Microbiology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Awais Iqbal
- School of Life Sciences, State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou, China
| | - Sahib Zada
- Department of Biology, College of Science, Shantou University, Shantou, China
| | - Barkat Ali
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Muhammad Hayat
- Institute of Microbial Technology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao Campus, China
| | - Muhammad Irfan
- College of Dentistry, Department of Oral Biology, University of Florida, Gainesville, FL. USA
| | - Shichang Kang
- State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China.
| |
Collapse
|
52
|
Unconventional Yeasts Are Tolerant to Common Antifungals, and Aureobasidium pullulans Has Low Baseline Sensitivity to Captan, Cyprodinil, and Difenoconazole. Antibiotics (Basel) 2020; 9:antibiotics9090602. [PMID: 32942551 PMCID: PMC7557980 DOI: 10.3390/antibiotics9090602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/09/2020] [Accepted: 09/11/2020] [Indexed: 01/16/2023] Open
Abstract
Many yeasts have demonstrated intrinsic insensitivity to certain antifungal agents. Unlike the fungicide resistance of medically relevant yeasts, which is highly undesirable, intrinsic insensitivity to fungicides in antagonistic yeasts intended for use as biocontrol agents may be of great value. Understanding how frequently tolerance exists in naturally occurring yeasts and their underlying molecular mechanisms is important for exploring the potential of biocontrol yeasts and fungicide combinations for plant protection. Here, yeasts were isolated from various environmental samples in the presence of different fungicides (or without fungicide as a control) and identified by sequencing the internal transcribed spacer (ITS) region or through matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry. Among 376 isolates, 47 taxa were identified, and Aureobasidium pullulans was the most frequently isolated yeast. The baseline sensitivity of this yeast was established for 30 isolates from different environmental samples in vitro to captan, cyprodinil, and difenoconazole. For these isolates, the baseline minimum inhibitory concentration (MIC50) values for all the fungicides were higher than the concentrations used for the control of plant pathogenic fungi. For some isolates, there was no growth inhibition at concentrations as high as 300 µg/mL for captan and 128 µg/mL for cyprodinil. This information provides insight into the presence of resistance among naturally occurring yeasts and allows the choice of strains for further mechanistic analyses and the assessment of A. pullulans for novel applications in combination with chemical agents and as part of integrated plant-protection strategies.
Collapse
|
53
|
Onetto CA, Schmidt SA, Roach MJ, Borneman AR. Comparative genome analysis proposes three new Aureobasidium species isolated from grape juice. FEMS Yeast Res 2020; 20:5902852. [DOI: 10.1093/femsyr/foaa052] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/04/2020] [Indexed: 12/24/2022] Open
Abstract
ABSTRACT
Aureobasidium pullulans is the most abundant and ubiquitous species within the genus and is also considered a core component of the grape juice microflora. So far, a small number of other Aureobasidium species have been reported, that in contrast to A. pullulans, appear far more constrained to specific habitats. It is unknown whether grape juice is a reservoir of novel Aureobasidium species, overlooked in the course of conventional morphological and meta-barcoding analyses. In this study, eight isolates from grape juice taxonomically classified as Aureobasidium through ITS sequencing were subjected to whole-genome phylogenetic, synteny and nucleotide identity analyses, which revealed three isolates to likely represent newly discovered Aureobasidium species. Analyses of ITS and metagenomic sequencing datasets show that these species can be present in grape juice samples from different locations and vintages. Functional annotation revealed the Aureobasidium isolates possess the genetic potential to support growth on the surface of plants and grapes. However, the loss of several genes associated with tolerance to diverse environmental stresses suggest a more constrained ecological range than A. pullulans.
Collapse
Affiliation(s)
- Cristobal A Onetto
- The Australian Wine Research Institute, Glen Osmond, PO Box 197, Adelaide, SA, 5064, Australia
| | - Simon A Schmidt
- The Australian Wine Research Institute, Glen Osmond, PO Box 197, Adelaide, SA, 5064, Australia
| | - Michael J Roach
- The Australian Wine Research Institute, Glen Osmond, PO Box 197, Adelaide, SA, 5064, Australia
| | - Anthony R Borneman
- The Australian Wine Research Institute, Glen Osmond, PO Box 197, Adelaide, SA, 5064, Australia
| |
Collapse
|
54
|
Onetto CA, Borneman AR, Schmidt SA. Investigating the effects of Aureobasidium pullulans on grape juice composition and fermentation. Food Microbiol 2020; 90:103451. [DOI: 10.1016/j.fm.2020.103451] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/15/2020] [Accepted: 01/31/2020] [Indexed: 10/25/2022]
|
55
|
Vidal A, Parada R, Mendoza L, Cotoras M. Endophytic Fungi Isolated from Plants Growing in Central Andean Precordillera of Chile with Antifungal Activity against Botrytis cinerea. J Fungi (Basel) 2020; 6:jof6030149. [PMID: 32858807 PMCID: PMC7560031 DOI: 10.3390/jof6030149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 08/07/2020] [Accepted: 08/12/2020] [Indexed: 12/26/2022] Open
Abstract
Botrytis cinerea is an important phytopathogenic fungus affecting the fruit production around the world. This fungus is controlled mainly by using synthetic fungicides, but many resistant isolates have been selected by the indiscriminate use of fungicides. Endophytic fungi or secondary metabolites obtained from them become an alternative method of control for this fungus. The aim of this work was to identify endophytic fungi with antifungal activity against the plant pathogenic fungus B. cinerea isolated from plants from Central Andean Precordillera of Chile. Three endophytic fungi (Ac1, Lc1 and Ec1) with antifungal activity against B. cinerea were isolated from native and endemic plants growing in Central Andean Precordillera of Chile. The isolates Lc1 (isolated from Lithraea caustica) and Ac1 (isolated from Acacia caven) were identified as Alternaria spp. and the isolate Ec1 (isolated from Echinopsis chiloensis) was identified as Aureobasidium spp. The isolated endophytic fungi would inhibit B. cinerea through the secretion of diffusible and volatile compounds affecting the mycelial growth, conidia germination and interestingly, it was also shown that the volatile compounds produced by the three isolated endophytic fungi suppressed the sporulation of B. cinerea.
Collapse
Affiliation(s)
| | | | - Leonora Mendoza
- Correspondence: (L.M.); (M.C.); Tel.: +56-2718-1062 (L.M.); +56-2718-1094 (M.C.)
| | - Milena Cotoras
- Correspondence: (L.M.); (M.C.); Tel.: +56-2718-1062 (L.M.); +56-2718-1094 (M.C.)
| |
Collapse
|
56
|
Kucharska K, Wachowska U, Czaplicki S. Wheat phyllosphere yeasts degrade propiconazole. BMC Microbiol 2020; 20:242. [PMID: 32758148 PMCID: PMC7409705 DOI: 10.1186/s12866-020-01885-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 06/29/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Yeasts, which are ubiquitous in agroecosystems, are known to degrade various xenobiotics. The aim of this study was to analyze the effect of fungicides on the abundance of natural yeast communities colonizing winter wheat leaves, to evaluate the sensitivity of yeast isolates to fungicides in vivo, and to select yeasts that degrade propiconazole. RESULTS Fungicides applied during the growing season generally did not affect the counts of endophytic yeasts colonizing wheat leaves. Propiconazole and a commercial mixture of flusilazole and carbendazim decreased the counts of epiphytic yeasts, but the size of the yeast community was restored after 10 days. Epoxiconazole and a commercial mixture of fluoxastrobin and prothioconazole clearly stimulated epiphyte growth. The predominant species isolated from leaves were Aureobasidium pullulans and Rhodotorula glutinis. In the disk diffusion test, 14 out of 75 yeast isolates were not sensitive to any of the tested fungicides. After 48 h of incubation in an aqueous solution of propiconazole, the Rhodotorula glutinis Rg 55 isolate degraded the fungicide in 75%. Isolates Rh. glutinis Rg 92 and Rg 55 minimized the phytotoxic effects of propiconazole under greenhouse conditions. The first isolate contributed to an increase in the dry matter content of wheat seedlings, whereas the other reduced the severity of chlorosis. CONCLUSION Not sensitivity of many yeast colonizing wheat leaves on the fungicides and the potential of isolate Rhodotorula glutinis Rg 55 to degrade of propiconazole was established. Yeast may partially eliminate the ecologically negative effect of fungicides.
Collapse
Affiliation(s)
- Katarzyna Kucharska
- Department of Entomology, Phytopathology and Molecular Diagnostics, Faculty of Environmental Management and Agriculture, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Urszula Wachowska
- Department of Entomology, Phytopathology and Molecular Diagnostics, Faculty of Environmental Management and Agriculture, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Sylwester Czaplicki
- Department of Food Plant Chemistry and Processing, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, pl. Cieszyński 1, 10-726 Olsztyn, Poland
| |
Collapse
|
57
|
Baldwin EL, Karki B, Johnson TJ, Zahler JD, Gibbons J, Gibbons WR. Enhancing Cellulase Production in Aureobasidium pullulans by Genome Shuffling. Ind Biotechnol (New Rochelle N Y) 2020. [DOI: 10.1089/ind.2018.0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Emily L. Baldwin
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD, USA
| | - Bishnu Karki
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD, USA
| | - Tylor J. Johnson
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD, USA
- Department of Microbiology, The University of Tennessee, Knoxville, TN, USA
| | - Jacob D. Zahler
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD, USA
| | - Jaimie Gibbons
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD, USA
| | - William R. Gibbons
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD, USA
| |
Collapse
|
58
|
Lee S, Suits M, Wituszynski D, Winston R, Martin J, Lee J. Residential urban stormwater runoff: A comprehensive profile of microbiome and antibiotic resistance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 723:138033. [PMID: 32392682 DOI: 10.1016/j.scitotenv.2020.138033] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/02/2020] [Accepted: 03/17/2020] [Indexed: 05/23/2023]
Abstract
Non-point stormwater runoff is a major contamination source of receiving waterbodies. Heightened incidence of waterborne disease outbreaks related to recreational use and source water contamination is associated with extreme rainfall events. Such extreme events are predicted to increase in some regions due to climate change. Consequently, municipal separate storm sewer systems (MS4s) conveying pathogens to receiving waters are a growing public health concern. In addition, the spread of antibiotic resistance genes (ARGs) and antibiotic resistant bacteria in various environmental matrices, including urban runoff, is an emerging threat. The resistome and microbiota profile of MS4 discharges has yet to be fully characterized. To address this knowledge gap, we first analyzed the relationship between rainfall depth and intensity and E. coli densities (fecal indicator) in stormwater from four MS4 outflows in Columbus, Ohio, USA during the spring and summer of 2017. Microbial source tracking (MST) was conducted to examine major fecal contamination sources in the study sewersheds. A subset of samples was analyzed for microbial and resistome profiles using a metagenomic approach. The results showed a significant positive relationship between outflow E. coli density and rainfall intensity. MST results indicate prevalent fecal contamination from ruminant populations in the study sites (91% positive among the samples tested). Protobacteria and Actinobacteria were two dominant bacteria at a phylum level. A diverse array of ARGs and potentially pathogenic bacteria (e.g. Salmonella enterica Typhimurium), fungi (e.g. Scedosporium apiospermum), and protists (e.g. Acanthamoeba palestinensis) were found in urban stormwater outflows that discharge into adjacent streams. The most prevalent ARGs among samples were β-lactam resistance genes and the most predominant virulence genes within bacterial community were related with Staphylococcus aureus. A comprehensive contamination profile indicates a need for sustainable strategies to manage urban stormwater runoff amid increasingly intense rainfall events to protect public and environmental health.
Collapse
Affiliation(s)
- Seungjun Lee
- College of Public Health, Division of Environmental Health Sciences, The Ohio State University, Columbus, OH 43210, USA.
| | - Michael Suits
- College of Public Health, Division of Environmental Health Sciences, The Ohio State University, Columbus, OH 43210, USA
| | - David Wituszynski
- Department of Food, Agricultural and Biological Engineering, OSU Sustainability Institute, The Ohio State University, Columbus, OH 43210, USA.
| | - Ryan Winston
- Department of Food, Agricultural and Biological Engineering, OSU Sustainability Institute, The Ohio State University, Columbus, OH 43210, USA; Department of Civil, Environmental, and Geodetic Engineering, The Ohio State University, Columbus, OH 43210, USA.
| | - Jay Martin
- Department of Food, Agricultural and Biological Engineering, OSU Sustainability Institute, The Ohio State University, Columbus, OH 43210, USA.
| | - Jiyoung Lee
- College of Public Health, Division of Environmental Health Sciences, The Ohio State University, Columbus, OH 43210, USA; Department of Food Science and Technology, The Ohio State University, Columbus, OH 43210, USA.
| |
Collapse
|
59
|
Ruiz-Moyano S, Hernández A, Galvan AI, Córdoba MG, Casquete R, Serradilla MJ, Martín A. Selection and application of antifungal VOCs-producing yeasts as biocontrol agents of grey mould in fruits. Food Microbiol 2020; 92:103556. [PMID: 32950150 DOI: 10.1016/j.fm.2020.103556] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 05/16/2020] [Accepted: 06/01/2020] [Indexed: 12/28/2022]
Abstract
Rotting caused by grey mould (Botrytis cinerea) is a concerning disease for numerous crops both pre- and postharvest stages. Application of antagonistic yeasts is a promising strategy for controlling grey mould incidence which could mitigate undesirable consequences of using synthetic fungicides. In this work, a screening for detection of yeasts isolated from figs producers of antifungal volatile organic compounds (VOCs) were performed by confrontation in double dishes systems. Eleven out of 34 yeasts confronted reduced B. cinerea growth parameter in vitro. This reduction was correlated (p ≤ 0.050) with the production of 10 volatile compounds: two acids (acetic acid and octanoic acid), 7 esters (Ethyl propionate, n-Propyl acetate, Isobutyl acetate, 2-methylbutyl acetate, furfuryl acetate, phenylmethyl acetate, 2-phenylethyl acetate) and one ketone (Heptan-2-one). In bases on in vitro assay, Hanseniaspora uvarum 793 was applied to in vivo assays with strawberries and cherries. The reduction of incidence of B. cinerea in strawberries at 7 °C and 25 °C was 54.9 and 72.1% after 6 and 3 days, respectively. The reduction of incidence of B. cinerea in cherries at 7 °C and 25 °C was 48.9 and 45.6% after 5 and 4 days, respectively. These results showed that VOCs produced by Hanseniaspora uvarum 793 are effective in the control of incidence of Botrytis cinerea in fruits, being a potential alternative to chemical fungicide.
Collapse
Affiliation(s)
- Santiago Ruiz-Moyano
- Nutrición y Bromatología, Escuela de Ingenierías Agrarias, Instituto Universitario de Recursos Agrarios (INURA), Universidad de Extremadura, Ctra. de Cáceres s/n, 06007, Badajoz, Spain
| | - Alejandro Hernández
- Nutrición y Bromatología, Escuela de Ingenierías Agrarias, Instituto Universitario de Recursos Agrarios (INURA), Universidad de Extremadura, Ctra. de Cáceres s/n, 06007, Badajoz, Spain.
| | - Ana I Galvan
- Área de Hortofruticultura, Centro de Investigaciones Finca La Orden-Valdesequera (CICYTEX), Autovía Madrid-Lisboa, s/n, 060187, Guadajira, Spain
| | - María G Córdoba
- Nutrición y Bromatología, Escuela de Ingenierías Agrarias, Instituto Universitario de Recursos Agrarios (INURA), Universidad de Extremadura, Ctra. de Cáceres s/n, 06007, Badajoz, Spain
| | - Rocio Casquete
- Nutrición y Bromatología, Escuela de Ingenierías Agrarias, Instituto Universitario de Recursos Agrarios (INURA), Universidad de Extremadura, Ctra. de Cáceres s/n, 06007, Badajoz, Spain
| | - Manuel J Serradilla
- Área de Vegetales, Instituto Tecnológico Agroalimentario de Extremadura (INTAEX), Centro de Investigaciones Científicas y Tecnológicas de Extremadura (CICYTEX), Avenida Adolfo Suárez s/n, 06007, Badajoz, Spain
| | - Alberto Martín
- Nutrición y Bromatología, Escuela de Ingenierías Agrarias, Instituto Universitario de Recursos Agrarios (INURA), Universidad de Extremadura, Ctra. de Cáceres s/n, 06007, Badajoz, Spain
| |
Collapse
|
60
|
Coleine C, Masonjones S, Sterflinger K, Onofri S, Selbmann L, Stajich JE. Peculiar genomic traits in the stress-adapted cryptoendolithic Antarctic fungus Friedmanniomyces endolithicus. Fungal Biol 2020; 124:458-467. [PMID: 32389308 DOI: 10.1016/j.funbio.2020.01.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/15/2020] [Accepted: 01/19/2020] [Indexed: 11/28/2022]
Abstract
Friedmanniomyces endolithicus is a highly melanized fungus endemic to the Antarctic, occurring exclusively in endolithic communities of the ice-free areas of the Victoria Land, including the McMurdo Dry Valleys, the coldest and most hyper-arid desert on Earth and accounted as the Martian analog on our planet. F. endolithicus is highly successful in these inhospitable environments, the most widespread and commonly isolated species from these peculiar niches, indicating a high degree of adaptation. The nature of its extremo tolerance has not been previously studied. To investigate this, we sequenced genome of F. endolithicus CCFEE 5311 to explore gene content and genomic patterns that could be attributed to its specialization. The predicted functional potential of the genes was assigned by similarity to InterPro and CAZy domains. The genome was compared to phylogenetically close relatives which are also melanized fungi occurring in extreme environments including Friedmanniomyces simplex, Baudoinia panamericana, Acidomyces acidophilus, Hortaea thailandica and Hortaea werneckii. We tested if shared genomic traits existed among these species and hyper-extremotolerant fungus F. endolithicus. We found that some characters for stress tolerance such as meristematic growth and cold tolerance are enriched in F. endolithicus that may be triggered by the exposure to Antarctic prohibitive conditions.
Collapse
Affiliation(s)
- Claudia Coleine
- Department of Ecological and Biological Sciences, University of Tuscia, Viterbo, Italy.
| | - Sawyer Masonjones
- Department of Microbiology and Plant Pathology, Institute for Integrative Genome Biology, University of California, Riverside, CA, USA.
| | - Katja Sterflinger
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria.
| | - Silvano Onofri
- Department of Ecological and Biological Sciences, University of Tuscia, Viterbo, Italy.
| | - Laura Selbmann
- Department of Ecological and Biological Sciences, University of Tuscia, Viterbo, Italy; Italian Antarctic National Museum (MNA), Mycological Section, Genoa, Italy.
| | - Jason E Stajich
- Department of Microbiology and Plant Pathology, Institute for Integrative Genome Biology, University of California, Riverside, CA, USA.
| |
Collapse
|
61
|
Temple TN, Thompson EC, Uppala S, Granatstein D, Johnson KB. Floral Colonization Dynamics and Specificity of Aureobasidium pullulans Strains Used to Suppress Fire Blight of Pome Fruit. PLANT DISEASE 2020; 104:121-128. [PMID: 31730414 DOI: 10.1094/pdis-09-18-1512-re] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Aureobasidium pullulans is used as a biocontrol agent for fire blight protection in organic apple and pear production. We assessed colonization of pome flowers by A. pullulans in orchards located near Corvallis, OR and Wenatchee, WA. Blossom Protect, a mix of A. pullulans strains CF10 and CF40, and its citrate-based companion, Buffer Protect, were sprayed at 70% bloom. Later in bloom, the population size of putative A. pullulans on flowers was estimated by dilution plating; plate scrapings of putative A. pullulans were then sampled and subjected to a PCR analysis. Sequenced PCR amplicons of the internal transcribed spacer region and the elongase gene confirmed the presence of A. pullulans, whereas a multiplex PCR with primers specific to CF10 and CF40 was used to determine the presence of the introduced strains. At Corvallis, a wet spring environment, A. pullulans, was recovered from most (>90%) Bartlett pear and Golden Delicious apple flowers sampled from experimental trees, regardless of whether the trees were treated with Blossom Protect. Nevertheless, population size estimates of A. pullulans on the flowers were correlated with the number of times Blossom Protect was sprayed on the trees. At Wenatchee, an arid spring environment, A. pullulans was detected on most flowers from trees treated with Blossom Protect, but only on a minority of flowers from nontreated controls. In both locations, the combined incidence of strains CF10 and CF40 on flowers averaged 89% on Blossom Protect-treated trees, but only 27% on adjacent, nontreated trees. During subsequent trials, the efficacy of Blossom Protect for fire blight control was compared with alternative yeast isolates, with each applied with Buffer Protect; local isolates of A. pullulans and Cryptococcus neoformans and a postharvest biocontrol strain of Cystofilobasidium infirmominiatum were used All yeast strains suppressed fire blight to a degree; however, in each of four trials, the level of suppression was highest with Blossom Protect, and it was significantly superior (P ≤ 0.05) to other yeast isolates in two of the trials. Because A. pullulans strains CF10 and CF40 were detected primarily on flowers on trees treated with Blossom Protect, and because they were detected much less frequently on nearby nontreated tress, we recommend treating every tree row with Blossom Protect at least once for organic fire blight suppression.
Collapse
Affiliation(s)
- T N Temple
- Oregon State University, Department of Botany and Plant Pathology, Corvallis, OR 97331
| | - E C Thompson
- Oregon State University, Department of Botany and Plant Pathology, Corvallis, OR 97331
| | - S Uppala
- Oregon State University, Department of Botany and Plant Pathology, Corvallis, OR 97331
| | - D Granatstein
- Washington State University, Tree Fruit Research and Extension Center, Wenatchee, WA 98801
| | - K B Johnson
- Oregon State University, Department of Botany and Plant Pathology, Corvallis, OR 97331
| |
Collapse
|
62
|
Velez P, Gasca-Pineda J, Riquelme M. Cultivable fungi from deep-sea oil reserves in the Gulf of Mexico: Genetic signatures in response to hydrocarbons. MARINE ENVIRONMENTAL RESEARCH 2020; 153:104816. [PMID: 31679790 DOI: 10.1016/j.marenvres.2019.104816] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 09/25/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
The estimation of oil spill effects on marine ecosystems is limited to the extent of our knowledge on the autochthonous biota. Fungi are involved in key ecological marine processes, representing a major component of post-spill communities. However, information on their functional capacities remains lacking. Herein we analyzed cultivable fungi from sediments in two oil-drilling regions of the Gulf of Mexico for their ability to tolerate and use hexadecane and 1-hexadecene as the sole carbon sources; and to evaluate gene expression profiles of key hydrocarbonoclastic taxa during utilization of these hydrocarbons. The isolated fungi showed differential sensitivity patterns towards the tested hydrocarbons under three different concentrations. Remarkably, six OTUs (Aureobasidium sp., Penicillium brevicompactum, Penicillium sp., Phialocephala sp., Cladosporium sp. 1 and 2) metabolized the tested alkane and alkene as the sole carbon sources, confirming that deep-sea fungal taxa are valuable genetic resources with potential use in bioremediation. RNA-seq results revealed distinctive gene expression profiles in the hydrocarbonoclastic fungus Penicillium sp. when using hexadecane and 1-hexadecene as the sole carbon sources, with up-regulation of genes involved in transmembrane transport, metabolism of six-carbons carbohydrates, and nitric oxide pathways.
Collapse
Affiliation(s)
- Patricia Velez
- Departamento de Microbiología, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, 22860, Mexico.
| | - Jaime Gasca-Pineda
- Departamento de Biología de la Conservación, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, 22860, Mexico
| | - Meritxell Riquelme
- Departamento de Microbiología, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, 22860, Mexico.
| |
Collapse
|
63
|
Jia SL, Ma Y, Chi Z, Liu GL, Hu Z, Chi ZM. Genome sequencing of a yeast-like fungal strain P6, a novel species of Aureobasidium spp.: insights into its taxonomy, evolution, and biotechnological potentials. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01531-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Abstract
Purpose
This study aimed to look insights into taxonomy, evolution, and biotechnological potentials of a yeast-like fungal strain P6 isolated from a mangrove ecosystem.
Methods
The genome sequencing for the yeast-like fungal strain P6 was conducted on a Hiseq sequencing platform, and the genomic characteristics and annotations were analyzed. The central metabolism and gluconate biosynthesis pathway were studied through the genome sequence data by using the GO, KOG, and KEGG databases. The secondary metabolite potentials were also evaluated.
Results
The whole genome size of the P6 strain was 25.41Mb and the G + C content of its genome was 50.69%. Totally, 6098 protein-coding genes and 264 non-coding RNA genes were predicted. The annotation results showed that the yeast-like fungal strain P6 had complete metabolic pathways of TCA cycle, EMP pathway, pentose phosphate pathway, glyoxylic acid cycle, and other central metabolic pathways. Furthermore, the inulinase activity associated with β-fructofuranosidase and high glucose oxidase activity in this strain have been demonstrated. It was found that this yeast-like fungal strain was located at root of most species of Aureobasidium spp. and at a separate cluster of all the phylogenetic trees. The P6 strain was predicted to contain three NRPS gene clusters, five type-I PKS gene clusters, and one type-I NRPS/PKS gene cluster via analysis at the antiSMASH Website. It may synthesize epichloenin A, fusaric acid, elsinochromes, and fusaridione A.
Conclusions
Based on its unique DNA sequence, taxonomic position in the phylogenetic tree and evolutional position, the yeast-like fungal strain P6 was identified as a novel species Aureobasidium hainanensis sp. nov. P6 isolate and had highly potential applications.
Collapse
|
64
|
Mitchison-Field LMY, Vargas-Muñiz JM, Stormo BM, Vogt EJD, Van Dierdonck S, Pelletier JF, Ehrlich C, Lew DJ, Field CM, Gladfelter AS. Unconventional Cell Division Cycles from Marine-Derived Yeasts. Curr Biol 2019; 29:3439-3456.e5. [PMID: 31607535 PMCID: PMC7076734 DOI: 10.1016/j.cub.2019.08.050] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/07/2019] [Accepted: 08/20/2019] [Indexed: 12/13/2022]
Abstract
Fungi have been found in every marine habitat that has been explored; however, the diversity and functions of fungi in the ocean are poorly understood. In this study, fungi were cultured from the marine environment in the vicinity of Woods Hole, MA, USA, including from plankton, sponge, and coral. Our sampling resulted in 35 unique species across 20 genera. We observed many isolates by time-lapse, differential interference contrast (DIC) microscopy and analyzed modes of growth and division. Several black yeasts displayed highly unconventional cell division cycles compared to those of traditional model yeast systems. Black yeasts have been found in habitats inhospitable to other life and are known for halotolerance, virulence, and stress resistance. We find that this group of yeasts also shows remarkable plasticity in terms of cell size control, modes of cell division, and cell polarity. Unexpected behaviors include division through a combination of fission and budding, production of multiple simultaneous buds, and cell division by sequential orthogonal septations. These marine-derived yeasts reveal alternative mechanisms for cell division cycles that seem likely to expand the repertoire of rules established from classic model system yeasts.
Collapse
Affiliation(s)
- Lorna M Y Mitchison-Field
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Marine Biological Laboratory, Woods Hole, MA 02354, USA
| | - José M Vargas-Muñiz
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Benjamin M Stormo
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Ellysa J D Vogt
- Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Sarah Van Dierdonck
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27708, USA
| | - James F Pelletier
- Marine Biological Laboratory, Woods Hole, MA 02354, USA; Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Christoph Ehrlich
- Marine Biological Laboratory, Woods Hole, MA 02354, USA; Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany
| | - Daniel J Lew
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27708, USA
| | - Christine M Field
- Marine Biological Laboratory, Woods Hole, MA 02354, USA; Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.
| | - Amy S Gladfelter
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Marine Biological Laboratory, Woods Hole, MA 02354, USA.
| |
Collapse
|
65
|
Xu X, Zhong A, Wang Y, Lin B, Li P, Ju W, Zhu X, Yu J, De Mandal S, Jin F. Molecular Identification of a Moricin Family Antimicrobial Peptide (Px-Mor) From Plutella xylostella With Activities Against the Opportunistic Human Pathogen Aureobasidium pullulans. Front Microbiol 2019; 10:2211. [PMID: 31681182 PMCID: PMC6797621 DOI: 10.3389/fmicb.2019.02211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 09/10/2019] [Indexed: 12/13/2022] Open
Abstract
Antimicrobial peptides (AMPs) represent the largest group of endogenous compounds and serves as a novel alternative to traditional antibiotics for the treatment of pathogenic microorganisms. Moricin is an important α-helical AMP plays a crucial role in insect humoral defense reactions. The present study was designed to identify and characterize novel AMP moricin (Px-Mor) from diamondback moth (Plutella xylostella) and tested its activity against bacterial and fungal infection including the opportunistic human pathogen Aureobasidium pullulans. Molecular cloning of Px-Mor using rapid amplification of cDNA ends revealed a 482 bp full length cDNA with 198 bp coding region. The deduced protein sequence contained 65 amino acids, and the mature peptides contained 42 amino acid residues with a molecular mass of 4.393 kDa. Expression analysis revealed that Px-Mor was expressed throughout the life cycle of P. xylostella with the highest level detectable in the fourth instar and prepupa stage. Tissue specific distribution showed that Px-Mor was highly expressed in fat body and hemocyte. In vitro, antimicrobial assays indicated that Px-Mor exhibited a broad antimicrobial spectrum against Gram positive bacteria (GPB), Gram negative bacteria (GNB) and fungi. Moreover, scanning electron microscopy and transmission electron microscopy (TEM) revealed that Px-Mor can cause obvious morphological alterations in A. pullulans, which demonstrated its powerful effect on the mycelia growth inhibition. Taken together, these results indicate that Px-Mor plays an important role in the immune responses of P. xylostella and can be further exploited as an antimicrobial agent against various diseases including for the treatment of A. pullulans infection.
Collapse
Affiliation(s)
- Xiaoxia Xu
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Anqiao Zhong
- Department of Respiratory Medicine, Yidu Central Hospital, Weifang, China
| | - Yansheng Wang
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical College, Guangzhou, China
| | - Boda Lin
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Peng Li
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Wenyan Ju
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Xiaojia Zhu
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Jing Yu
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Surajit De Mandal
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Fengliang Jin
- Department of Entomology, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou, China
| |
Collapse
|
66
|
Gostinčar C, Turk M, Zajc J, Gunde‐Cimerman N. Fifty Aureobasidium pullulans genomes reveal a recombining polyextremotolerant generalist. Environ Microbiol 2019; 21:3638-3652. [PMID: 31112354 PMCID: PMC6852026 DOI: 10.1111/1462-2920.14693] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 04/17/2019] [Accepted: 05/20/2019] [Indexed: 01/31/2023]
Abstract
The black yeast Aureobasidium pullulans is a textbook example of a generalistic and ubiquitous fungus thriving in a wide variety of environments. To investigate whether A. pullulans is a true generalist, or alternatively, whether part of its versatility can be attributed to intraspecific specialization masked by cryptic diversification undetectable by traditional phylogenetic analyses, we sequenced and analysed the genomes of 50 strains of A. pullulans from different habitats and geographic locations. No population structure was observed in the sequenced strains. Decay of linkage disequilibrium over shorter physical distances (<100 bp) than in many sexually reproducing fungi indicates a high level of recombination in the species. A homothallic mating locus was found in all of the sequenced genomes. Aureobasidium pullulans appears to have a homogeneous population genetics structure, which is best explained by good dispersal and high levels of recombination. This means that A. pullulans is a true generalist that can inhabit different habitats without substantial specialization to any of these habitats at the genomic level. Furthermore, in the future, the high level of A. pullulans recombination can be exploited for the identification of genomic loci that are involved in the many biotechnologically useful traits of this black yeast.
Collapse
Affiliation(s)
- Cene Gostinčar
- Department of Biology, Biotechnical FacultyUniversity of Ljubljana, Jamnikarjeva 101, SI‐1000LjubljanaSlovenia
- Lars Bolund Institute of Regenerative Medicine, BGI‐QingdaoQingdao 266555China
| | - Martina Turk
- Department of Biology, Biotechnical FacultyUniversity of Ljubljana, Jamnikarjeva 101, SI‐1000LjubljanaSlovenia
| | - Janja Zajc
- Department of Biology, Biotechnical FacultyUniversity of Ljubljana, Jamnikarjeva 101, SI‐1000LjubljanaSlovenia
- National Institute of BiologyVečna pot 111, SI‐1000LjubljanaSlovenia
| | - Nina Gunde‐Cimerman
- Department of Biology, Biotechnical FacultyUniversity of Ljubljana, Jamnikarjeva 101, SI‐1000LjubljanaSlovenia
| |
Collapse
|
67
|
Jiang H, Chen TJ, Chi Z, Hu Z, Liu GL, Sun Y, Zhang SH, Chi ZM. Macromolecular pullulan produced by Aureobasidium melanogenum 13-2 isolated from the Taklimakan desert and its crucial roles in resistance to the stress treatments. Int J Biol Macromol 2019; 135:429-436. [DOI: 10.1016/j.ijbiomac.2019.05.190] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/15/2019] [Accepted: 05/26/2019] [Indexed: 11/29/2022]
|
68
|
Baldwin EL, Karki B, Zahler JD, Rinehart M, Gibbons WR. Submerged vs. Solid‐State Conversion of Soybean Meal into a High Protein Feed UsingAureobasidium pullulans. J AM OIL CHEM SOC 2019. [DOI: 10.1002/aocs.12251] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Emily L. Baldwin
- Department of Biology and MicrobiologySouth Dakota State University Brookings SD 57007 USA
| | - Bishnu Karki
- Department of Biology and MicrobiologySouth Dakota State University Brookings SD 57007 USA
| | - Jacob D. Zahler
- Department of Biology and MicrobiologySouth Dakota State University Brookings SD 57007 USA
| | | | - William R. Gibbons
- Department of Biology and MicrobiologySouth Dakota State University Brookings SD 57007 USA
| |
Collapse
|
69
|
High pullulan biosynthesis from high concentration of glucose by a hyperosmotic resistant, yeast-like fungal strain isolated from a natural comb-honey. Food Chem 2019; 286:123-128. [DOI: 10.1016/j.foodchem.2019.01.206] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 01/14/2019] [Accepted: 01/31/2019] [Indexed: 11/24/2022]
|
70
|
Frau A, Kenny JG, Lenzi L, Campbell BJ, Ijaz UZ, Duckworth CA, Burkitt MD, Hall N, Anson J, Darby AC, Probert CSJ. DNA extraction and amplicon production strategies deeply inf luence the outcome of gut mycobiome studies. Sci Rep 2019; 9:9328. [PMID: 31249384 PMCID: PMC6597572 DOI: 10.1038/s41598-019-44974-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 05/28/2019] [Indexed: 12/28/2022] Open
Abstract
Microbial ecology studies are often performed through extraction of metagenomic DNA followed by amplification and sequencing of a marker. It is known that each step may bias the results. These biases have been explored for the study of bacterial communities, but rarely for fungi. Our aim was therefore to evaluate methods for the study of the gut mycobiome. We first evaluated DNA extraction methods in fungal cultures relevant to the gut. Afterwards, to assess how these methods would behave with an actual sample, stool from a donor was spiked with cells from the same cultures. We found that different extraction kits favour some species and bias against others. In terms of amplicon sequencing, we evaluated five primer sets, two for ITS2 and one for ITS1, 18S and 28S rRNA. Results showed that 18S rRNA outperformed the other markers: it was able to amplify all the species in the mock community and to discriminate among them. ITS primers showed both amplification and sequencing biases, the latter related to the variable length of the product. We identified several biases in the characterisation of the gut mycobiome and showed how crucial it is to be aware of these before drawing conclusions from the results of these studies.
Collapse
Affiliation(s)
- Alessandra Frau
- Gastroenterology Research Unit, Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Ashton Street, Liverpool, L69 3GE, UK
| | - John G Kenny
- Centre for Genomic Research (CGR), University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK.,Teagasc Food Research Centre, Moorepark, Cork, Ireland
| | - Luca Lenzi
- Centre for Genomic Research (CGR), University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK
| | - Barry J Campbell
- Gastroenterology Research Unit, Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Ashton Street, Liverpool, L69 3GE, UK
| | - Umer Z Ijaz
- School of Engineering, University of Glasgow, Oakfield Avenue, Glasgow, G12 8LT, UK
| | - Carrie A Duckworth
- Gastroenterology Research Unit, Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Ashton Street, Liverpool, L69 3GE, UK
| | - Michael D Burkitt
- Gastroenterology Research Unit, Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Ashton Street, Liverpool, L69 3GE, UK.,Division of Diabetes, Endocrinology and Gastroenterology, University of Manchester, Dover Street, Manchester, M13 9PT, UK
| | - Neil Hall
- Earlham Institute, Colney Ln, Norwich, NR4 7UZ, UK
| | - Jim Anson
- Liverpool Clinical Laboratories Directorate of Infection and Immunity, Royal Liverpool and Broadgreen University Hospitals NHS Trust, Prescot Street, Liverpool, L7 8XP, UK
| | - Alistair C Darby
- Centre for Genomic Research (CGR), University of Liverpool, Crown Street, Liverpool, L69 7ZB, UK
| | - Christopher S J Probert
- Gastroenterology Research Unit, Department of Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Ashton Street, Liverpool, L69 3GE, UK.
| |
Collapse
|
71
|
Feng J, Li T, Zhang X, Chen J, Zhao T, Zou X. Efficient production of polymalic acid from xylose mother liquor, an environmental waste from the xylitol industry, by a T-DNA-based mutant of Aureobasidium pullulans. Appl Microbiol Biotechnol 2019; 103:6519-6527. [DOI: 10.1007/s00253-019-09974-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 06/01/2019] [Accepted: 06/10/2019] [Indexed: 10/26/2022]
|
72
|
Plant Pathogenic Fungi Associated with Coraebus florentinus (Coleoptera: Buprestidae) Attacks in Declining Oak Forests. FORESTS 2019. [DOI: 10.3390/f10060488] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The black-banded oak borer, Coraebus florentinus, is an emerging pest of oak trees in the western Mediterranean region. Larvae of the insect are xylophagous and progressively excavate an annular gallery that interrupts sap flow, resulting in the death of the attacked branches. Until now, limited information has been available regarding the ecological interactions between C. florentinus and the main plant pathogenic fungi involved in the etiology of oak decline. Knowledge of these interactions is important in understanding their impact in natural ecosystems and developing appropriate management strategies. Therefore, in this study, we characterized the fungal communities occurring in the exoskeleton of adults and larvae of C. florentinus and associated with the necrotic wood tissues surrounding the branch galleries of declining oak trees. A total of 29 fungal species were identified based on DNA sequence data and morphological features, of which 14 were from symptomatic woody tissues, six from insect exoskeleton, and nine from both insects and symptomatic wood tissues. The most frequent fungal species, Cryphonectria naterciae (15.9% of isolates), Dothiorella iberica (11.3%), and Diplodia corticola (9.9%), were isolated from both insect and gallery systems. All three species are well-known oak pathogens and are reported here, for the first time, to be associated with C. florentinus. At the same time, 89.6% of the fungal taxa were isolated from one or two sites, highlighting the site-dependence of fungal community assemblages.
Collapse
|
73
|
Zhang Y, Feng J, Wang P, Xia J, Li X, Zou X. CRISPR/Cas9-mediated efficient genome editing via protoplast-based transformation in yeast-like fungus Aureobasidium pullulans. Gene 2019; 709:8-16. [PMID: 31132514 DOI: 10.1016/j.gene.2019.04.079] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 04/05/2019] [Accepted: 04/27/2019] [Indexed: 01/30/2023]
Abstract
Aureobasidium pullulans, a yeast-like fungus with strong environmental adaptability, remains a potential host for bio-production of different valuable metabolites. However, its potential application is limited by low-efficient genetic manipulation. In this study, CRISPR/Cas9-mediated genome editing via protoplast-based transformation system was developed. To test CRISPR/Cas9 mediated genomic mutagenesis, the orotidine 5-phosphate decarboxylase (umps) gene was used as a counter-selectable selection marker. By co-transforming of two plasmids harboring cas9 gene and a guide RNA targeting umps, respectively, the CRISPR/Cas9 system could significantly increase frequency of mutation in the targeting site of guide RNA. To further validate that CRISPR/Cas9 stimulated homologous recombination with donor DNA, a color reporter system of beta-glucuronidase (gus) gene was developed for calculating positive mutation rate. The results showed that positive mutation rate with CRISPR/Cas9 system was ~40% significantly higher than only with the donor DNA (~4%). Furthermore, the different posttranscriptional RNA processing schemes were analyzed by compared the effects of flanking gRNA with self-cleaving ribozymes or tRNA. The result demonstrated that gRNA processed by self-cleaving ribozymes achieves higher positive mutant rate. This study provided foundation for a simple and powerful genome editing tool for A. pullulans. Moreover, a counter-selectable selection marker (umps) and a color reporter system (gus) were being developed as genetic parts for strain engineering.
Collapse
Affiliation(s)
- Yuan Zhang
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Jun Feng
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Pan Wang
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Jun Xia
- College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, PR China
| | - Xiaorong Li
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
| | - Xiang Zou
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
| |
Collapse
|
74
|
Wang M, Danesi P, James TY, Al-Hatmi AMS, Najafzadeh MJ, Dolatabadi S, Ming C, Liou GY, Kang Y, de Hoog S. Comparative pathogenicity of opportunistic black yeasts in Aureobasidium. Mycoses 2019; 62:803-811. [PMID: 31107996 DOI: 10.1111/myc.12931] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/06/2019] [Accepted: 05/07/2019] [Indexed: 12/01/2022]
Abstract
Aureobasidium pullulans and A. melanogenum are black-yeast-like surface colonisers and are commonly encountered as contaminants in the hospital. The species are able to produce melanin which play a role in protection against environmental stress and irradiation. Aureobasidium melanogenum shows higher frequency in opportunistic infections compared to A. pullulans. Comparative pathogenicity of opportunistic black yeasts between Aureobasidium pullulans and A. melanogenum to explain the observed differences in frequency in infection. Degrees of melanisation and thermotolerance were measured, and virulence of strains from different sources was examined in Galleria mellonela and murine infection models. Aureobasidium melanogenum responds with increased melanisation to temperature stress and generally survives at 37°C, A. pullulans on average scored less on these parameters. In the murine model, differences between species were not significant, but the melanised A. melanogenum group showed the highest virulence. This result was not reproducible in Galleria mellonella larvae at 25°C. The A. melanogenum black group showed higher pathogenicity in murine model, indicating that the combination of melanisation and thermotolerance rather than species affiliation is instrumental. Galleria larvae did not survive very well at 37°C, and hence, this model is judged insufficient to detect the small virulence differences observed in Aureobasidium.
Collapse
Affiliation(s)
- Meizhu Wang
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education of Guizhou & Guizhou Talent Base for Microbiology and Human Health, Key Laboratory of Medical Microbiology and Parasitology of Education Department of Guizhou, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,Center of Expertise in Mycology, Radboud University Medical Center/CWZ, Nijmegen, The Netherlands.,Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
| | - Patrizia Danesi
- Laboratorio di Parassitologia, Istituto Zooprofilattico Sperimentale delle Venezie, Venice, Italy
| | - Timothy Y James
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan
| | - Abdullah M S Al-Hatmi
- Center of Expertise in Mycology, Radboud University Medical Center/CWZ, Nijmegen, The Netherlands.,Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands.,Ministry of Health, Directorate General of Health Services, Ibri, Oman
| | - Mohammad Javad Najafzadeh
- Department of Parasitology and Mycology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Somayeh Dolatabadi
- Faculty of Engineering, Sabzevar University of New Technology, Sabzevar, Iran
| | - Chunyan Ming
- Department of Clinical Laboratory Center, Nanchong Central Hospital, Nanchong, China
| | - Guey-Yuh Liou
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu, Taiwan
| | - Yingqian Kang
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education of Guizhou & Guizhou Talent Base for Microbiology and Human Health, Key Laboratory of Medical Microbiology and Parasitology of Education Department of Guizhou, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China.,Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
| | - Sybren de Hoog
- Center of Expertise in Mycology, Radboud University Medical Center/CWZ, Nijmegen, The Netherlands.,Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
| |
Collapse
|
75
|
Chen G, Zhu Y, Zhang G, Liu H, Wei Y, Wang P, Wang F, Xian M, Xiang H, Zhang H. Optimization and characterization of pullulan production by a newly isolated high-yielding strainAureobasidium melanogenum. Prep Biochem Biotechnol 2019; 49:557-566. [DOI: 10.1080/10826068.2019.1591988] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Guoqiang Chen
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P.R. China
- College of Life Science, Qingdao University, Qingdao, P.R. China
| | - Youshuang Zhu
- School of Biological Science, Jining Medical University, Jining, P.R. China
| | - Ge Zhang
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P.R. China
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, P. R. China
| | - Haobao Liu
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, P. R. China
| | - Yuxi Wei
- College of Life Science, Qingdao University, Qingdao, P.R. China
| | - Pinggui Wang
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P.R. China
- College of Life Science, Qingdao University, Qingdao, P.R. China
| | - Fan Wang
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P.R. China
| | - Mo Xian
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P.R. China
| | - Haiying Xiang
- Yunnan Academy of Tobacco Sciences, Kunming, P.R. China
| | - Haibo Zhang
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, P.R. China
| |
Collapse
|
76
|
Zajc J, Gostinčar C, Černoša A, Gunde-Cimerman N. Stress-Tolerant Yeasts: Opportunistic Pathogenicity Versus Biocontrol Potential. Genes (Basel) 2019; 10:genes10010042. [PMID: 30646593 PMCID: PMC6357073 DOI: 10.3390/genes10010042] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/03/2019] [Accepted: 01/09/2019] [Indexed: 01/26/2023] Open
Abstract
Stress-tolerant fungi that can thrive under various environmental extremes are highly desirable for their application to biological control, as an alternative to chemicals for pest management. However, in fungi, the mechanisms of stress tolerance might also have roles in mammal opportunism. We tested five species with high biocontrol potential in agriculture (Aureobasidium pullulans, Debayomyces hansenii, Meyerozyma guilliermondii, Metschnikowia fructicola, Rhodotorula mucilaginosa) and two species recognized as emerging opportunistic human pathogens (Exophiala dermatitidis, Aureobasidium melanogenum) for growth under oligotrophic conditions and at 37 °C, and for tolerance to oxidative stress, formation of biofilms, production of hydrolytic enzymes and siderophores, and use of hydrocarbons as sole carbon source. The results show large overlap between traits desirable for biocontrol and traits linked to opportunism (growth under oligotrophic conditions, production of siderophores, high oxidative stress tolerance, and specific enzyme activities). Based on existing knowledge and these data, we suggest that oligotrophism and thermotolerance together with siderophore production at 37 °C, urease activity, melanization, and biofilm production are the main traits that increase the potential for fungi to cause opportunistic infections in mammals. These traits should be carefully considered when assessing safety of potential biocontrol agents.
Collapse
Affiliation(s)
- Janja Zajc
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, SI-1000 Ljubljana, Slovenia.
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| | - Cene Gostinčar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
- Institut 'Jožef Stefan', Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
| | - Anja Černoša
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, SI-1000 Ljubljana, Slovenia.
| | - Nina Gunde-Cimerman
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| |
Collapse
|
77
|
Vero S, Garmendia G, Martínez-Silveira A, Cavello I, Wisniewski M. Yeast Activities Involved in Carbon and Nitrogen Cycles in Antarctica. SPRINGER POLAR SCIENCES 2019. [DOI: 10.1007/978-3-030-02786-5_3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
78
|
Pinto C, Custódio V, Nunes M, Songy A, Rabenoelina F, Courteaux B, Clément C, Gomes AC, Fontaine F. Understand the Potential Role of Aureobasidium pullulans, a Resident Microorganism From Grapevine, to Prevent the Infection Caused by Diplodia seriata. Front Microbiol 2018; 9:3047. [PMID: 30619138 PMCID: PMC6297368 DOI: 10.3389/fmicb.2018.03047] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 11/27/2018] [Indexed: 12/12/2022] Open
Abstract
Grapevine trunk diseases (GTDs) are one of the major concern amongst grapevine diseases, responsible for the decline of vineyards and for several economical losses. Since grapevine is naturally colonized by resident microorganisms such as Aureobasidium pullulans, the present challenge is to understand their biocontrol potential and how such microorganisms can be successfully integrated in the control of GTDs. In this context, the first priority consists to exploit the plant-beneficial-phytopathogen interactions in plant model systems, to identify the most prevalent equilibrium limiting expression of GTDs. In the current study, we deep characterized the interaction of a resident and abundant microorganism from grapevine - Aureobasidium pullulans strain Fito_F278 - against D. seriata F98.1, a Botryosphaeria dieback agent, and with plant (cv Chardonnay). Results revealed that A. pullulans strain Fito_F278 was able to reduce significantly the mycelium growth of D. seriata F98.1 at 33.41 ± 0.55%, under in vitro conditions, though this reduction is possibly dependent on a direct interaction between strain Fito_F278 and pathogen. Furthermore, strain Fito_F278 was able to promote an induction of some plant defense responses in cutting plants, 1 week after the D. seriata F98.1 infection. Results evidenced that strain Fito_F278 colonized efficiently grapevine at both epiphyte and endophyte level, could persist on plant roots for long-periods (up to 2 months after its inoculation) and grow at different pH and high salinity conditions. Moreover, a significant decrease of the microbial load from soil and rhizosphere was observed in plants treated with the strain Fito_F278, suggesting its competitivity potential in a microbial ecosystem. Altogether, the present study gives the first insights about the interaction of A. pullulans strain Fito_F278, a resident microorganism, with grapevine, its potential role against a Botryosphaeria dieback agent, and highlights its importance to toward more resilient grapevine.
Collapse
Affiliation(s)
- Cátia Pinto
- SFR Condorcet – FR CNRS 3417, Unité Résistance Induite et Bioprotection des Plantes (RIBP), Université de Reims Champagne-Ardenne, Reims, France
- Genomics Unit, Biocant – Biotechnology Innovation Center, Cantanhede, Portugal
| | - Valéria Custódio
- Genomics Unit, Biocant – Biotechnology Innovation Center, Cantanhede, Portugal
| | - Mariana Nunes
- Genomics Unit, Biocant – Biotechnology Innovation Center, Cantanhede, Portugal
| | - Aurélie Songy
- SFR Condorcet – FR CNRS 3417, Unité Résistance Induite et Bioprotection des Plantes (RIBP), Université de Reims Champagne-Ardenne, Reims, France
| | - Fanja Rabenoelina
- SFR Condorcet – FR CNRS 3417, Unité Résistance Induite et Bioprotection des Plantes (RIBP), Université de Reims Champagne-Ardenne, Reims, France
| | - Barbara Courteaux
- SFR Condorcet – FR CNRS 3417, Unité Résistance Induite et Bioprotection des Plantes (RIBP), Université de Reims Champagne-Ardenne, Reims, France
| | - Christophe Clément
- SFR Condorcet – FR CNRS 3417, Unité Résistance Induite et Bioprotection des Plantes (RIBP), Université de Reims Champagne-Ardenne, Reims, France
| | - Ana Catarina Gomes
- Genomics Unit, Biocant – Biotechnology Innovation Center, Cantanhede, Portugal
- Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Florence Fontaine
- SFR Condorcet – FR CNRS 3417, Unité Résistance Induite et Bioprotection des Plantes (RIBP), Université de Reims Champagne-Ardenne, Reims, France
| |
Collapse
|
79
|
Tabasum S, Noreen A, Maqsood MF, Umar H, Akram N, Nazli ZIH, Chatha SAS, Zia KM. A review on versatile applications of blends and composites of pullulan with natural and synthetic polymers. Int J Biol Macromol 2018; 120:603-632. [DOI: 10.1016/j.ijbiomac.2018.07.154] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 07/17/2018] [Accepted: 07/24/2018] [Indexed: 02/07/2023]
|
80
|
Diguță CF, Proca IG, Jurcoane Ș, Matei F. Molecular characterization by PCR-RFLP of indigenous fungal isolates from hypersaline stream water in România. Folia Microbiol (Praha) 2018; 64:407-414. [PMID: 30426303 DOI: 10.1007/s12223-018-0664-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 11/09/2018] [Indexed: 11/27/2022]
Abstract
This is the first exhaustive report on the fungal community biodiversity in hypersaline water in România. A total of 27 fungal strains (19 molds and eight yeast) have been isolated from Lopătari hypersaline water, Buzau County. Based on classical investigation, these strains have been identified as belonging to the genera Aureobasidium, Alternaria, Aspergillus, Penicillium, and Fusarium. The molecular characterization of fungal isolates at species level was performed using PCR-RFLP analysis of the 5.8S-ITS region. PCR products were digested with different combinations of endonucleases. The most frequently isolated species were Aspergillus niger (14.81% of all isolates), A. versicolor, (14.81%) and Penicillium crustosum (14.81%). In addition, ribosomal restriction patterns which exhibited profiles specific to Aureobasidium pullulans were derived, and to discriminate between Aureobasidium isolates, the elongase-encoding gene (ELO) was chosen as a genetic marker followed by digestion with endonuclease HhaI. Five yeast isolates displayed restriction patterns corresponding to Aureobasidium melanogenum (18.52%) and three isolates to Aureobasidium pullulans (11.11%). In addition, the RFLP types of Aureobasidium pullulans varieties with HhaI are clearly distinguished and could be applied to assess the intraspecific variability.
Collapse
Affiliation(s)
- Camelia Filofteia Diguță
- Faculty of Biotechnology, University of Agronomic Sciences and Veterinary Medicine, 59, Mărăşti Blv., Bucharest, Romania.
| | - Irinel Gabriel Proca
- Faculty of Biotechnology, University of Agronomic Sciences and Veterinary Medicine, 59, Mărăşti Blv., Bucharest, Romania
| | - Ștefana Jurcoane
- Faculty of Biotechnology, University of Agronomic Sciences and Veterinary Medicine, 59, Mărăşti Blv., Bucharest, Romania
| | - Florentina Matei
- Faculty of Biotechnology, University of Agronomic Sciences and Veterinary Medicine, 59, Mărăşti Blv., Bucharest, Romania
| |
Collapse
|
81
|
Abstract
The saprophytic yeast-like fungus Aureobasidium pullulans has been well documented for over 60 years in the microbiological literature. It is ubiquitous in distribution, being found in a variety of environments (plant surfaces, soil, water, rock surfaces and manmade surfaces), and with a worldwide distribution from cold to warm climates and wet/humid regions to arid ones. Isolates and strains of A. pullulans produce a wide range of natural products well documented in the international literature and which have been regarded as safe for biotechnological and environmental applications. Showing antagonistic activity against plant pathogens (especially post-harvest pathogens) is one of the major applications currently in agriculture of the fungus, with nutrient and space competition, production of volatile organic compounds, and production of hydrolytic enzymes and antimicrobial compounds (antibacterial and antifungal). The fungus also shows a positive role on mycotoxin biocontrol through various modes, with the most striking being that of binding and/or absorption. A. pullulans strains have been reported to produce very useful industrial enzymes, such as β-glucosidase, amylases, cellulases, lipases, proteases, xylanases and mannanases. Pullulan (poly-α-1,6-maltotriose biopolymer) is an A. pullulans trademark product with significant properties and biotechnological applications in the food, cosmetic and pharmaceutical industries. Poly (β-l-malic acid), or PMA, which is a natural biopolyester, and liamocins, a group of produced heavy oils and siderophores, are among other valuable compounds detected that are of possible biotechnological use. The fungus also shows a potential single-cell protein source capacity with high levels of nucleic acid components and essential amino acids, but this remains to be further explored. Last but not least, the fungus has shown very good biocontrol against aerial plant pathogens. All these properties are of major interest in the vitivinicultural sector and are thoroughly reviewed under this prism, concluding on the importance that A. pullulans may have if used at both vineyard and winery levels. This extensive array of properties provides excellent tools for the viticulturist/farmer as well as for the oenologist to combat problems in the field and create a high-quality wine.
Collapse
|
82
|
Cordero RJB, Robert V, Cardinali G, Arinze ES, Thon SM, Casadevall A. Impact of Yeast Pigmentation on Heat Capture and Latitudinal Distribution. Curr Biol 2018; 28:2657-2664.e3. [PMID: 30078567 PMCID: PMC6245944 DOI: 10.1016/j.cub.2018.06.034] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 05/09/2018] [Accepted: 06/15/2018] [Indexed: 01/25/2023]
Abstract
Pigmentation is a fundamental characteristic of living organisms that is used to absorb radiation energy and to regulate temperature. Since darker pigments absorb more radiation than lighter ones, they stream more heat, which can provide an adaptive advantage at higher latitudes and a disadvantage near the Tropics, because of the risk of overheating. This intuitive process of color-mediated thermoregulation, also known as the theory of thermal melanism (TTM), has been only tested in ectothermic animal models [1-8]. Here, we report an association between yeast pigmentation and their latitude of isolation, with dark-pigmented isolates being more frequent away from the Tropics. To measure the impact of microbial pigmentation in energy capture from radiation, we generated 20 pigmented variants of Cryptococcus neoformans and Candida spp. Infrared thermography revealed that dark-pigmented yeasts heated up faster and reached higher temperatures (up to 2-fold) than lighter ones following irradiation. Melanin-pigmented C. neoformans exhibited a growth advantage relative to non-melanized yeasts when incubated under the light at 4°C but increased thermal susceptibility at 25°C ambient temperatures. Our results extend the TTM to microbiology and suggest pigmentation as an ancient adaptation mechanism for gaining thermal energy from radiation. The contribution of microbial pigmentation in heat absorption is relevant to microbial ecology and for estimating global temperatures. The color variations available in yeasts provide new opportunities in chromatology to quantify radiative heat transfer and validate biophysical models of heat flow [9] that are not possible with plants or animals.
Collapse
Affiliation(s)
- Radames J B Cordero
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, 615 North Wolfe Street, Baltimore, MD 21205, USA
| | - Vincent Robert
- Westerdijk Fungal Biodiversity Institute, 8 Uppsalalaan, 3584CT Ultrecht, the Netherlands
| | - Gianluigi Cardinali
- Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy
| | - Ebuka S Arinze
- Department of Electrical and Computer Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
| | - Susanna M Thon
- Department of Electrical and Computer Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
| | - Arturo Casadevall
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, 615 North Wolfe Street, Baltimore, MD 21205, USA.
| |
Collapse
|
83
|
Pullusurfactans A–E, new biosurfactants produced by Aureobasidium pullulans A11211-4-57 from a fleabane, Erigeron annus (L.) pers. J Antibiot (Tokyo) 2018; 71:920-926. [DOI: 10.1038/s41429-018-0089-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/16/2018] [Accepted: 08/02/2018] [Indexed: 11/08/2022]
|
84
|
Simultaneous production of single cell oil and fumaric acid by a newly isolated yeast Aureobasidium pullulans var. aubasidani DH177. Bioprocess Biosyst Eng 2018; 41:1707-1716. [DOI: 10.1007/s00449-018-1994-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 07/29/2018] [Indexed: 01/24/2023]
|
85
|
Jiang H, Xue SJ, Li YF, Liu GL, Chi ZM, Hu Z, Chi Z. Efficient transformation of sucrose into high pullulan concentrations by Aureobasidium melanogenum TN1-2 isolated from a natural honey. Food Chem 2018; 257:29-35. [DOI: 10.1016/j.foodchem.2018.03.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 03/01/2018] [Accepted: 03/01/2018] [Indexed: 01/07/2023]
|
86
|
Efficient Production of Polymalic Acid by a Novel Isolated Aureobasidium pullulans Using Metabolic Intermediates and Inhibitors. Appl Biochem Biotechnol 2018; 187:612-627. [PMID: 30014335 DOI: 10.1007/s12010-018-2825-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/19/2018] [Indexed: 10/28/2022]
Abstract
Polymalic acid (PMA) is a linear anionic polyester composed of L-malic acid monomers, which have potential applications as drug carriers, surgical suture, and biodegradable plastics. In this study, a novel strain of Aureobasidium pullulans var. melanogenum GXZ-6 was isolated and identified according to the morphological observation and deoxyribonucleic acid internal-transcribed spacer sequence analysis, and the product of PMA was characterized by FT-IR, 13C-NMR, and 1H-NMR spectra. The PMA titer of GXZ-6 reached 62.56 ± 1.18 g L-1 with productivity of 0.35 g L-1 h-1 using optimized medium with addition of metabolic intermediates (citrate and malate) and inhibitor (malonate) by batch fermentation in a 10-L fermentor. Besides that the malate for PMA synthesis in GXZ-6 might mainly come from the glyoxylate cycle, based on results, citrate, malate, malonate, and maleate increased while succinate and fumarate inhibited the production of PMA, which was different from that of other A. pullulans. This study provided a potential strain and a simple metabolic control strategy for high-titer production of PMA and shared novel information on the biosynthesis pathway of PMA in A. pullulans.
Collapse
|
87
|
Wajda Ł, Wyderka M, Polak Z, Duda-Chodak A, Makarewicz M. Examination of novel Aureobasidium pullulans isolates dominating apple microflora and assessing their potential for apple juice spoilage. World J Microbiol Biotechnol 2018; 34:115. [PMID: 29998388 PMCID: PMC6096541 DOI: 10.1007/s11274-018-2497-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 07/07/2018] [Indexed: 11/26/2022]
Abstract
There is very little up to date information regarding apple microflora so in the current study we decided to address that issue and assess whether dominant fungi which reside in fruit might spoil apple juice. Microorganisms were isolated from apples of Koksa Górska harvested in the middle of October in 2016 and 2017. Identification of isolates was based on the sequencing of ribosomal DNA. Some isolates were characteristic for a particular year but in both years apple microflora was dominated by Aureobasidium pullulans. Based on phylogenetic analysis it was stated that only one isolate (LW81) was closely related to strains which are already described in available databases. All other isolates collected in the current study differed significantly from sequences stored in databases, tending to form a common cluster. It was possible to predict secondary structure of ITS2 region only for the isolate LW81, while we managed to establish the length and location of 5.8S gene in Rfam database for all sequences. A. pullulans is known exopolysaccharide producer so obtained microorganisms were tested for their ability to synthesise those substances on Czapek-Dox agar. The strain which proved to be the most significant exopolysaccharide producer (isolate LW14) was inoculated in the sterilised apple juice at three different initial cell number (100, 1000 and 10,000 cfu/ml) and subjected to pasteurisation. In all cases pasteurisation eliminated fungal growth effectively, therefore A. pullulans strains should not pose any risk to the quality of pasteurised apple juices.
Collapse
Affiliation(s)
- Łukasz Wajda
- Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7A str, 30-387 Krakow, Poland
| | - Magdalena Wyderka
- Department of Fermentation Technology and Technical Microbiology, Faculty of Food Technology, University of Agriculture in Krakow, ul. Balicka 122, 30-149 Krakow, Poland
| | - Zuzanna Polak
- Department of Fermentation Technology and Technical Microbiology, Faculty of Food Technology, University of Agriculture in Krakow, ul. Balicka 122, 30-149 Krakow, Poland
| | - Aleksandra Duda-Chodak
- Department of Fermentation Technology and Technical Microbiology, Faculty of Food Technology, University of Agriculture in Krakow, ul. Balicka 122, 30-149 Krakow, Poland
| | - Małgorzata Makarewicz
- Department of Fermentation Technology and Technical Microbiology, Faculty of Food Technology, University of Agriculture in Krakow, ul. Balicka 122, 30-149 Krakow, Poland
| |
Collapse
|
88
|
Navas-Suárez PE, Díaz-Delgado J, Matushima ER, Fávero CM, Sánchez Sarmiento AM, Sacristán C, Ewbank AC, Marques Joppert A, Barbanti Duarte JM, dos Santos-Cirqueira C, Cogliati B, Mesquita L, Maiorka PC, Catão-Dias JL. A retrospective pathology study of two Neotropical deer species (1995-2015), Brazil: Marsh deer (Blastocerus dichotomus) and brown brocket deer (Mazama gouazoubira). PLoS One 2018; 13:e0198670. [PMID: 29879222 PMCID: PMC5991706 DOI: 10.1371/journal.pone.0198670] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 05/23/2018] [Indexed: 11/18/2022] Open
Abstract
This retrospective study describes the biological and epidemiological aspects, gross and microscopical findings, and most likely causes of death (CD) in two species of Neotropical deer in Brazil. The animals were collected between 1995 and 2015 and represented 75 marsh deer (MD) and 136 brown brocket deer (BBD). Summarized, pneumonia was diagnosed microscopically in 48 MD and 52 BBD; 76 deer suffered trauma, involving dog attack (14 BBD) and vehicle-collision (14 BBD). Pulmonary edema (50 MD; 55 BBD) and congestion (57 MD; 78 BBD) were the most common findings for both species. Additionally, we diagnosed ruminal and myocardial mycosis in MD and BBD, respectively; ovarian dysgerminoma and pancreatic trematodiasis in BBD; and lesions suggestive of malignant catarrhal fever and orbiviral hemorrhagic disease in both species. The main CD in MD was: respiratory (41/75), alimentary, nutritional, trauma and euthanasia (3/75 each). Correspondingly, in BBD were: trauma (34/131), respiratory (30/131) and euthanasia (9/131). Respiratory disease was often defined by pulmonary edema and pneumonia. We provide evidence that respiratory disease, mainly pneumonia, is a critical pathological process in these Neotropical deer species. Although no etiological agents were identified, there is evidence of bacterial and viral involvement. Our results show trauma, mainly anthropogenic, as a common ailment in BBD. We propose to prioritize respiratory disease in future research focused on South American deer health aspects. We believe anthropogenic trauma may be a primary threat for populations of BBD.
Collapse
Affiliation(s)
- Pedro Enrique Navas-Suárez
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Josué Díaz-Delgado
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Eliana Reiko Matushima
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Cintia Maria Fávero
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Angélica Maria Sánchez Sarmiento
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Carlos Sacristán
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Ana Carolina Ewbank
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Adriana Marques Joppert
- Divisão Técnica de Medicina Veterinária e Manejo da Fauna Silvestre (DEPAVE-3), São Paulo, Brazil
| | - Jose Mauricio Barbanti Duarte
- Deer Research and Conservation Center (NUPECCE), Department of Animal Science, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | | | - Bruno Cogliati
- Laboratory of Morphological and Molecular Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Leonardo Mesquita
- Laboratory of Animal Models, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Paulo César Maiorka
- Laboratory of Animal Models, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - José Luiz Catão-Dias
- Laboratory of Wildlife Comparative Pathology - LAPCOM, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| |
Collapse
|
89
|
Nguyen MT, Thomas T. Diversity, host-specificity and stability of sponge-associated fungal communities of co-occurring sponges. PeerJ 2018; 6:e4965. [PMID: 29888140 PMCID: PMC5991299 DOI: 10.7717/peerj.4965] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 05/23/2018] [Indexed: 01/30/2023] Open
Abstract
Fungi play a critical role in a range of ecosystems; however, their interactions and functions in marine hosts, and particular sponges, is poorly understood. Here we assess the fungal community composition of three co-occurring sponges (Cymbastela concentrica, Scopalina sp., Tedania anhelans) and the surrounding seawater over two time points to help elucidate host-specificity, stability and potential core members, which may shed light into the ecological function of fungi in sponges. The results showed that ITS-amplicon-based community profiling likely provides a more realistic assessment of fungal diversity in sponges than cultivation-dependent approaches. The sponges studied here were found to contain phylogenetically diverse fungi (eight fungal classes were observed), including members of the family Togniniaceae and the genus Acrostalagmus, that have so far not been reported to be cultured from sponges. Fungal communities within any given sponge species were found to be highly variable compared to bacterial communities, and influenced in structure by the community of the surrounding seawater, especially considering temporal variation. Nevertheless, the sponge species studied here contained a few "variable/core" fungi that appeared in multiple biological replicates and were enriched in their relative abundance compared to seawater communities. These fungi were the same or highly similar to fungal species detected in sponges around the world, which suggests a prevalence of horizontal transmission where selectivity and enrichment of some fungi occur for those that can survive and/or exploit the sponge environment. Our current sparse knowledge about sponge-associated fungi thus indicate that fungal communities may perhaps not play as an important ecological role in the sponge holobiont compared to bacterial or archaeal symbionts.
Collapse
Affiliation(s)
- Mary T.H.D. Nguyen
- Centre for Marine Bio-Innovation and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Torsten Thomas
- Centre for Marine Bio-Innovation and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia
| |
Collapse
|
90
|
Yeast species diversity in apple juice for cider production evidenced by culture-based method. Folia Microbiol (Praha) 2018; 63:677-684. [DOI: 10.1007/s12223-018-0609-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/30/2018] [Indexed: 01/18/2023]
|
91
|
Yang J, Yang W, Feng J, Chen J, Jiang M, Zou X. Enhanced polymalic acid production from the glyoxylate shunt pathway under exogenous alcohol stress. J Biotechnol 2018; 275:24-30. [PMID: 29621553 DOI: 10.1016/j.jbiotec.2018.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 02/25/2018] [Accepted: 04/01/2018] [Indexed: 01/14/2023]
Abstract
Polymalic acid (PMA) is a water-soluble biopolymer produced by the yeast-like fungus Aureobasidium pullulans. In this study, the physiological response of A. pullulans against exogenous alcohols stress was investigated. Interestingly, ethanol stress was an effective inducer of enhanced PMA yield, although cell growth was slightly inhibited. The stress-responsive gene malate synthase (mls), which is involved in the glyoxylate shunt, was identified and was found to be regulated by exogenous ethanol stress. Therefore, an engineered strain, YJ-MLS, was constructed by overexpressing the endogenous mls gene, which increased the PMA titer by 16.2% compared with the wild-type strain. Following addition of 1% (v/v) of ethanol, a high PMA titer of 40.0 ± 0.38 g/L was obtained using batch fermentation with the mutant YJ-MLS in a 5-L fermentor, with a strongest PMA productivity of 0.56 g/L h. This study was the interesting report to show strengthening of the carbon metabolic flow from the glyoxylate shunt for PMA synthesis, and also provided a new sight for re-recognizing the regulatory behavior of alcohol stress in eukaryotic microbes.
Collapse
Affiliation(s)
- Jing Yang
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China
| | - Wenwen Yang
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China
| | - Jun Feng
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China
| | - Jie Chen
- Wuhan Sunhy Biology Co., Ltd, Wuhan 430074, PR China; School of Chemical Engineering& Pharmacy, Wuhan Institute of Technology, Wuhan 430205, PR China
| | - Min Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, PR China
| | - Xiang Zou
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China.
| |
Collapse
|
92
|
Chen TJ, Chi Z, Jiang H, Liu GL, Hu Z, Chi ZM. Cell wall integrity is required for pullulan biosynthesis and glycogen accumulation in Aureobasidium melanogenum P16. Biochim Biophys Acta Gen Subj 2018; 1862:1516-1526. [PMID: 29550432 DOI: 10.1016/j.bbagen.2018.03.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 03/11/2018] [Accepted: 03/13/2018] [Indexed: 11/18/2022]
Abstract
BACKGROUND Pullulan and glycogen have many applications and physiological functions. However, to date, it has been unknown where and how the pullulan is synthesized in the yeast cells and if cell wall structure of the producer can affect pullulan and glycogen biosynthesis. METHODS The genes related to cell wall integrity were cloned, characterized, deleted and complemented. The cell wall integrity, pullulan biosynthesis, glycogen accumulation and gene expression were examined. RESULTS In this study, the GT6 and GT7 genes encoding different α1,2 mannosyltransferases in Aureobasidium melanogenum P16 were cloned and characterized. The proteins deduced from both the GT6 and GT7 genes contained the conserved sequences YNMCHFWSNFEI and YSTCHFWSNFEI of a Ktr mannosyltransferase family. The removal of each gene and both the two genes caused the changes in colony and cell morphology and enhanced glycogen accumulation, leading to a reduced pullulan biosynthesis and the declined expression of many genes related to pullulan biosynthesis. The swollen cells of the disruptants were due to increased accumulation of glycogen, suggesting that uridine diphosphate glucose (UDP-glucose) was channeled to glycogen biosynthesis in the disruptants, rather than pullulan biosynthesis. Complementation of the GT6 and GT7 genes in the corresponding disruptants and growth of the disruptants in the presence of 0.6 M KCl made pullulan biosynthesis, glycogen accumulation, colony and cell morphology be restored. GENERAL SIGNIFICANCE This is the first report that the two α1,2 mannosyltransferases were required for colony and cell morphology, glycogen accumulation and pullulan biosynthesis in the pullulan producing yeast.
Collapse
Affiliation(s)
- Tie-Jun Chen
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China
| | - Zhe Chi
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, 266003 Qingdao, China
| | - Hong Jiang
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China
| | - Guang-Lei Liu
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, 266003 Qingdao, China
| | - Zhong Hu
- Department of Biology, Shantou University, Shantou 515063, China
| | - Zhen-Ming Chi
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, 266003 Qingdao, China.
| |
Collapse
|
93
|
Peeters LHM, Huinink HP, Voogt B, Adan OCG. Oil type and cross-linking influence growth of Aureobasidium melanogenum on vegetable oils as a single carbon source. Microbiologyopen 2018. [PMID: 29527827 PMCID: PMC6291786 DOI: 10.1002/mbo3.605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aureobasidium melanogenum is the main fungus found in a spontaneously formed biofilm on a oil‐treated wood. This dark colored biofilm functions as a protective coating. To better understand biofilm formation, in this study A. melanogenum was cultured on olive oil and raw linseed oil. Metabolic activity and oil conversion were measured. The results show that A. melanogenum is able to grow on linseed oil and olive oil as a single carbon source. The fungus produces the enzyme lipase to convert the oil into fatty acids and glycerol. Metabolic activity and oil conversion were equal on linseed oil and olive oil. The fungus was not able to grow on severe cross‐linked linseed oil, meaning that the degree of cross‐linking of the oil is important for growth of A. melanogenum. Dark coloring of the colony was seen on linseed oil, which might be a stress response on the presence of autoxidation products in linseed oil. The colony on olive oil showed delayed melanin production indicating an inhibitory effect of olive oil on melanin production.
Collapse
Affiliation(s)
- Loes H M Peeters
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Hendrik P Huinink
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Benjamin Voogt
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Olaf C G Adan
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| |
Collapse
|
94
|
Nasr S, Mohammadimehr M, Geranpayeh Vaghei M, Amoozegar MA, Shahzadeh Fazeli SA. Aureobasidium mangrovei sp. nov., an ascomycetous species recovered from Hara protected forests in the Persian Gulf, Iran. Antonie van Leeuwenhoek 2018; 111:1697-1705. [DOI: 10.1007/s10482-018-1059-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 02/28/2018] [Indexed: 11/25/2022]
|
95
|
Bonatsou S, Paramithiotis S, Panagou EZ. Evolution of Yeast Consortia during the Fermentation of Kalamata Natural Black Olives upon Two Initial Acidification Treatments. Front Microbiol 2018; 8:2673. [PMID: 29375534 PMCID: PMC5767579 DOI: 10.3389/fmicb.2017.02673] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 12/21/2017] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to elucidate the yeast consortia structure and dynamics during Greek-style processing of Kalamata natural black olives in different brine solutions. Olives were subjected to spontaneous fermentation in 7% (w/v) NaCl brine solution (control treatment) or brine acidified with (a) 0.5% (v/v) vinegar, and (b) 0.1% (v/v) lactic acid at the onset of fermentation. Changes in microbial counts, pH, acidity, organic acids, sugars, and alcohols were analyzed for a period of 187 days. Yeast consortia diversity was evaluated at days 4, 34, 90, 140, and 187 of fermentation. A total of 260 isolates were characterized at sub-species level by rep-PCR genomic fingerprinting with the oligo-nucleotide primer (GTG)5. The characterization of yeast isolates at species level was performed by sequencing of the D1/D2 domain of 26S rRNA gene. Results showed that yeasts dominated the process presenting a relatively broad range of biodiversity composed of 11 genera and 21 species. No lactic acid bacteria (LAB) or Enterobacteriaceae could be enumerated after 20 and 10 days of fermentation, respectively. The dominant yeast species at the beginning were Aureobasidium pullulans for control and vinegar acidification treatments, and Candida naeodendra for lactic acid treatment. Between 34 and 140 days the dominant species were Candida boidinii, Candida molendinolei and Saccharomyces cerevisiae. In the end of fermentation the dominant species in all processes were C. boidinii and C. molendinolei, followed by Pichia manshurica and S. cerevisiae in lactic acid acidification treatment, P. manshurica in vinegar acidification treatment, and Pichia membranifaciens in control fermentation.
Collapse
Affiliation(s)
- Stamatoula Bonatsou
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, Greece
| | - Spiros Paramithiotis
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, Greece
| | - Efstathios Z. Panagou
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, Greece
| |
Collapse
|
96
|
|
97
|
Lee MT, Lai LP, Lin WC, Ciou JY, Chang SC, Yu B, Lee TT. Improving Nutrition Utilization and Meat Quality of Broiler Chickens Through Solid-State Fermentation of Agricultural By-Products by Aureobasidium Pullulans. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2017. [DOI: 10.1590/1806-9061-2017-0495] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- MT Lee
- National Chung Hsing University, Taiwan
| | - LP Lai
- National Chung Hsing University, Taiwan
| | - WC Lin
- National Chung Hsing University, Taiwan
| | | | - SC Chang
- Livestock Research Institute, Taiwan
| | - B Yu
- National Chung Hsing University, Taiwan
| | - TT Lee
- National Chung Hsing University, Taiwan
| |
Collapse
|
98
|
Turk M, Gostinčar C. Glycerol metabolism genes in Aureobasidium pullulans and Aureobasidium subglaciale. Fungal Biol 2017; 122:63-73. [PMID: 29248115 DOI: 10.1016/j.funbio.2017.10.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 09/18/2017] [Accepted: 10/15/2017] [Indexed: 11/18/2022]
Abstract
Intracellular glycerol accumulation is one of the main fungal adaptations to osmotic and also cold stress. We investigated the management of glycerol metabolism in polyextremotolerant black yeasts Aureobasidium pullulans and Aureobasidium subglaciale. We show that increased salinity (5 % and 10 %; w/v), but not cold (10 °C) trigger intracellular glycerol accumulation. The transcriptional response of the genes involved in glycerol synthesis, degradation and import, to increased salinity, low temperature or a combination of both was analysed with real-time PCR. Each of the two species contains an NAD+-dependent glycerol-3-phosphate dehydrogenase, a glycerol-3-phosphate phosphatase, a mitochondrial glycerol-3-phosphate dehydrogenase, two copies of a glycerol kinase, and more than ten copies of major facilitator superfamily transporters similar to glycerol proton symporters. Similarly to glycerol accumulation itself, transcriptional response to hypersaline stress was larger compared to low temperature stress and was more consistent in A. pullulans compared to A. subglaciale, reflecting the different stress tolerance and ecological strategy of each species.
Collapse
Affiliation(s)
- Martina Turk
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| | - Cene Gostinčar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| |
Collapse
|
99
|
The current status of Aureobasidium pullulans in biotechnology. Folia Microbiol (Praha) 2017; 63:129-140. [DOI: 10.1007/s12223-017-0561-4] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 10/22/2017] [Indexed: 11/26/2022]
|
100
|
Humphries Z, Seifert KA, Hirooka Y, Visagie CM. A new family and genus in Dothideales for Aureobasidium-like species isolated from house dust. IMA Fungus 2017; 8:299-315. [PMID: 29242777 PMCID: PMC5729714 DOI: 10.5598/imafungus.2017.08.02.05] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 10/10/2017] [Indexed: 11/01/2022] Open
Abstract
An international survey of house dust collected from eleven countries using a modified dilution-to-extinction method yielded 7904 isolates. Of these, six strains morphologically resembled the asexual morphs of Aureobasidium and Hormonema (sexual morphs ?Sydowia), but were phylogenetically distinct. A 28S rDNA phylogeny resolved strains as a distinct clade in Dothideales with families Aureobasidiaceae and Dothideaceae their closest relatives. Further analyses based on the ITS rDNA region, β-tubulin, 28S rDNA, and RNA polymerase II second largest subunit confirmed the distinct status of this clade and divided strains among two consistent subclades. As a result, we introduce a new genus and two new species as Zalariaalba and Z. obscura, and a new family to accommodate them in Dothideales. Zalaria is a black yeast-like fungus, grows restrictedly and produces conidiogenous cells with holoblastic synchronous or percurrent conidiation. Zalaria microscopically closely resembles Hormonema by having only one to two loci per conidiogenous cell, but species of our new genus generally has more restricted growth. Comparing the two species, Z. obscura grows faster on lower water activity (aw) media and produces much darker colonies than Z. alba after 7 d. Their sexual states, if extant, are unknown.
Collapse
Affiliation(s)
- Zoë Humphries
- Biodiversity (Mycology), Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, Canada, K1A 0C6
| | - Keith A Seifert
- Biodiversity (Mycology), Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, Canada, K1A 0C6.,Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON, Canada, K1N 6N5
| | - Yuuri Hirooka
- Department of Clinical Plant Science, Faculty of Bioscience, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo, Japan
| | - Cobus M Visagie
- Biodiversity (Mycology), Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, Canada, K1A 0C6.,Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, ON, Canada, K1N 6N5.,Biosystematics Division, ARC-Plant Health and Protection, P/BagX134, Queenswood 0121, Pretoria, South Africa
| |
Collapse
|