Ecology of Mycotoxigenic Fusarium species on Cereal Seeds

1989 ◽  
Vol 52 (10) ◽  
pp. 737-742 ◽  
Author(s):  
JOHN T. MILLS
Keyword(s):  
Current Knowledge ◽  
Fusarium Species ◽  
Fungal Growth ◽  
Ecological Context ◽  
Ecological Studies ◽  
Mycotoxin Production ◽  
Ecological Information ◽  
Factors Influencing ◽  
And Storage

The occurrence and development of toxigenic Fusarium species on cereal and other seeds is examined in an ecological context. Current knowledge is reviewed of factors influencing fungal growth and mycotoxin development in field and storage environments by F. sporotrichioides, F. poae, F. semitectum, F. equiseti, F. graminearum, F. culmorum, F. crookwellense, F. moniliforme, F. subglutinans, and F. oxysporum. Most ecological studies have been concerned with F. graminearum and production of deoxynivalenol and zearalenone on cereals; much more ecological information is needed on the growth and mycotoxin production by other toxigenic Fusarium species.

scholarly journals Influence of Two Garlic-Derived Compounds, Propyl Propane Thiosulfonate (PTS) and Propyl Propane Thiosulfinate (PTSO), on Growth and Mycotoxin Production by Fusarium Species In Vitro and in Stored Cereals

Toxins ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 495 ◽  
Author(s):  
Kalliopi Mylona ◽  
Esther Garcia-Cela ◽  
Michael Sulyok ◽  
Angel Medina ◽  
Naresh Magan
Keyword(s):  
Water Activity ◽  
Fusarium Species ◽  
Fungal Growth ◽  
Inhibitory Effect ◽  
Effective Control ◽  
Mycotoxin Production ◽  
Potential Use ◽  
Stimulation Of

Two garlic-derived compounds, Propyl Propane Thiosulfonate (PTS) and Propyl Propane Thiosulfinate (PTSO), were examined for their efficacy against mycotoxigenic Fusarium species (F. graminearum, F. langsethiae, F. verticillioides). The objectives were to assess the inhibitory effect of these compounds on growth and mycotoxin production in vitro, and in situ in artificially inoculated wheat, oats and maize with one isolate of each respectively, at different water activity (aw) conditions when stored for up to 20 days at 25 °C. In vitro, 200 ppm of either PTS or PTSO reduced fungal growth by 50–100% and mycotoxin production by >90% depending on species, mycotoxin and aw conditions on milled wheat, oats and maize respectively. PTS was generally more effective than PTSO. Deoxynivalenol (DON) and zearalenone (ZEN) were decreased by 50% with 80 ppm PTSO. One-hundred ppm of PTS reduced DON and ZEN production in wheat stored at 0.93 aw for 20 days, although contamination was still above the legislative limits. Contrasting effects on T-2/HT-2 toxin contamination of oats was found depending on aw, with PTS stimulating production under marginal conditions (0.93 aw), but at 0.95 aw effective control was achieved with 100 ppm. Treatment of stored maize inoculated with F. verticilliodies resulted in a stimulation of total fumonsins in most treatments. The potential use of such compounds for mycotoxin control in stored commodities is discussed.

Antifungal Activity of Lactobacillus paracasei subsp. tolerans against Fusarium proliferatum and Fusarium graminearum in a Liquid Culture Setting

2008 ◽  
Vol 71 (11) ◽  
pp. 2213-2216 ◽  
Author(s):  
YOUSEF I. HASSAN ◽  
LLOYD B. BULLERMAN
Keyword(s):  
Antifungal Activity ◽  
Fusarium Species ◽  
Agar Plate ◽  
Fungal Growth ◽  
Low Ph ◽  
Fusarium Proliferatum ◽  
Lactobacillus Paracasei ◽  
Mycotoxin Production ◽  
Inhibition Of Growth ◽  
Sourdough Bread

Lactobacillus paracasei subsp. tolerans, isolated from a traditional sourdough bread culture and previously shown to have antifungal activity against Fusarium species, was tested for inhibition of growth of Fusarium proliferatum M 5991 and M 5689 and F. graminearum R 4053 in a liquid medium setting. This isolate completely inhibited the growth of F. proliferatum M 5689 and M 5991 and F. graminearum R 4053, whereas such growth was not inhibited in the control in a supernatant agar plate assay. When this isolate was tested using 2M medium (MRS–modified Myro media) known for supporting Fusarium growth and trichothecene production, it was found to inhibit fungal growth but promote mycotoxin production at the same time. The antifungal activity was determined to be the result of organic acids and low pH. The mechanism of the mycotoxin production promotion requires further investigation.

Inhibition of Fusarium Growth and Mycotoxin Production in Culture Medium and in Maize Kernels by Natural Phenolic Acids

2016 ◽  
Vol 79 (10) ◽  
pp. 1753-1758 ◽  
Author(s):  
ELENA FERRUZ ◽  
SUSANA LORAN ◽  
MARTA HERRERA ◽  
ISABEL GIMENEZ ◽  
NOEMI BERVIS ◽  
...  
Keyword(s):  
Phenolic Acids ◽  
Fusarium Species ◽  
Fungal Growth ◽  
Toxin Production ◽  
Inhibitory Effect ◽  
Fungal Species ◽  
Mycotoxin Production ◽  
Marked Inhibitory Effect ◽  
Total Inhibition ◽  
Maize Kernels

ABSTRACT The possible role of natural phenolic compounds in inhibiting fungal growth and toxin production has been of recent interest as an alternative strategy to the use of chemical fungicides for the maintenance of food safety. Fusarium is a worldwide fungal genus mainly associated with cereal crops. The most important Fusarium mycotoxins are trichothecenes, zearalenone, and fumonisins. This study was conducted to evaluate the potential of four natural phenolic acids (caffeic, ferulic, p-coumaric, and chlorogenic) for the control of mycelial growth and mycotoxin production by six toxigenic species of Fusarium. The addition of phenolic acids to corn meal agar had a marked inhibitory effect on the radial growth of all Fusarium species at levels of 2.5 to 10 mM in a dose-response pattern, causing total inhibition (100%) in all species except F. sporotrichioides and F. langsethiae. However, the effects of phenolic acids on mycotoxin production in maize kernels were less evident than the effects on growth. The fungal species differed in their responses to the phenolic acid treatments, and significant reductions in toxin concentrations were observed only for T-2 and HT-2 (90% reduction) and zearalenone (48 to 77% reduction). These results provide data that could be used for developing pre- and postharvest strategies for controlling Fusarium infection and subsequent toxin production in cereal grains.

scholarly journals Effect of Temperature during Drying and Storage of Dried Figs on Growth, Gene Expression and Aflatoxin Production

Toxins ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 134
Author(s):  
Ana Isabel Galván ◽  
Alicia Rodríguez ◽  
Alberto Martín ◽  
Manuel Joaquín Serradilla ◽  
Ana Martínez-Dorado ◽  
...  
Keyword(s):  
Gene Expression ◽  
Aflatoxin Production ◽  
Effect Of Temperature ◽  
Mycotoxin Production ◽  
Industrial Processing ◽  
Factors Associated ◽  
Different Temperatures ◽  
Major Producer ◽  
Main Factors ◽  
And Storage

Dried fig is susceptible to infection by Aspergillus flavus, the major producer of the carcinogenic mycotoxins. This fruit may be contaminated by the fungus throughout the entire chain production, especially during natural sun-drying, post-harvest, industrial processing, storage, and fruit retailing. Correct management of such critical stages is necessary to prevent mould growth and mycotoxin accumulation, with temperature being one of the main factors associated with these problems. The effect of different temperatures (5, 16, 25, 30, and 37 °C) related to dried-fig processing on growth, one of the regulatory genes of aflatoxin pathway (aflR) and mycotoxin production by A. flavus, was assessed. Firstly, growth and aflatoxin production of 11 A. flavus strains were checked before selecting two strains (M30 and M144) for in-depth studies. Findings showed that there were enormous differences in aflatoxin amounts and related-gene expression between the two selected strains. Based on the results, mild temperatures, and changes in temperature during drying and storage of dried figs should be avoided. Drying should be conducted at temperatures >30 °C and close to 37 °C, while industry processing, storage, and retailing of dried figs are advisable to perform at refrigeration temperatures (<10 °C) to avoid mycotoxin production.

Caligids-potential pathogens for marine finfish aquaculture in Mexico?

2017 ◽  
Vol 44 (3) ◽  
pp. 433-441
Author(s):  
Francisco Neptalí Morales-Serna ◽  
Juan Manuel Martínez-Brown ◽  
Rosa Maria Medina-Guerrero ◽  
Emma Josefina Fajer-Ávila
Keyword(s):  
Coastal Waters ◽  
Host Location ◽  
Current Knowledge ◽  
Control Strategies ◽  
Sea Lice ◽  
Ecological Studies ◽  
Parasitic Copepods ◽  
The Family ◽  
And Control ◽  
Finfish Aquaculture

Parasitic copepods of the family Caligidae, the so-called sea lice, may be deleterious to marine or brackish finfish aquaculture. To date, biological and ecological studies of sea lice have been mostly restricted to species from cold or temperate regions. In Mexico there are some records of sea lice species on marine fishes; however, the research regarding their biology and ecology has been scarce. It is possible that a high biodiversity of sea lice is distributed in coastal waters of Mexico; therefore, their significance as pathogenic parasites should increase. The purpose of this review is to outline the current knowledge of the life cycle, host location, ecology, effect on fish health, and control strategies of sea lice in order to establish supportive basis for natural resource management and control of parasites and diseases of marine fish cultured in Mexico.

scholarly journals Modelling Fungal Growth, Mycotoxin Production and Release in Grana Cheese

2020 ◽  
Vol 8 (1) ◽  
pp. 69 ◽  
Author(s):  
Marco Camardo Leggieri ◽  
Amedeo Pietri ◽  
Paola Battilani
Keyword(s):  
Predictive Models ◽  
Fungal Growth ◽  
Cyclopiazonic Acid ◽  
Fungal Species ◽  
Fungal Ecology ◽  
Influence Of Temperature ◽  
Mycotoxin Production ◽  
Roquefortine C ◽  
Grana Cheese

No information is available in the literature about the influence of temperature (T) on Penicillium and Aspergillus spp. growth and mycotoxin production on cheese rinds. The aim of this work was to: (i) study fungal ecology on cheese in terms of T requirements, focusing on the partitioning of mycotoxins between the rind and mycelium; and (ii) validate predictive models previously developed by in vitro trials. Grana cheese rind blocks were inoculated with A. versicolor, P. crustosum, P. nordicum, P. roqueforti, and P. verrucosum, incubated at different T regimes (10–30 °C, step 5 °C) and after 14 days the production of mycotoxins (ochratoxin A (OTA); sterigmatocystin (STC); roquefortine C (ROQ-C), mycophenolic acid (MPA), Pr toxin (PR-Tox), citrinin (CIT), cyclopiazonic acid (CPA)) was quantified. All the fungi grew optimally around 15–25 °C and produced the expected mycotoxins (except MPA, Pr-Tox, and CIT). The majority of the mycotoxins produced remained in the mycelium (~90%) in three out of five fungal species (P. crustosum, P. nordicum, and P. roqueforti); the opposite occurred for A. versicolor and P. verrucosum with 71% and 58% of STC and OTA detected in cheese rind, respectively. Available predictive models fitted fungal growth on the cheese rind well, but validation was not possible for mycotoxins because they were produced in a very narrow T range.

scholarly journals Potential Role and Involvement of Antioxidants and Other Secondary Metabolites of Wheat in the Infection Process and Resistance to Fusarium spp.

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2235
Author(s):  
Jana Chrpová ◽  
Matyáš Orsák ◽  
Petr Martinek ◽  
Jaromír Lachman ◽  
Martina Trávníčková
Keyword(s):  
Secondary Metabolites ◽  
Redox Regulation ◽  
Current Knowledge ◽  
Fusarium Species ◽  
Infection Process ◽  
Head Blight ◽  
Grain Color ◽  
Wheat Gene ◽  
New Varieties ◽  
Native Resistance

This article provides a summary of current knowledge about wheat metabolites that may affect resistance against Fusarium head blight (FHB). The mechanisms of resistance, the roles of secondary metabolites in wheat defense, and future directions for breeding are assessed. The soluble phenols play an important role in redox regulation in plant tissues and can act as antimicrobial compounds. The color of cereal hulls and grains is caused by such natural pigments as anthocyanins in the aleurone, endosperm, and pericarp layers of the grain. Phenolic acids, alkylresorcinols, and phytohormones actively participate in the defense system, whereas carotenoids show various effects against Fusarium species that are positively correlated with the levels of their mycotoxins. Pathogen infestation of vegetative tissues induces volatile organic compounds production, which can provide defensive functions to infested wheat. The efficient use of native resistance in the wheat gene pool, introgression of resistant alleles, and implementation of modern genotypic strategies to increase levels of native secondary metabolites with antifungal properties can enhance the FHB resistance of new varieties. Expanding the breeding interest in the use of forms with different grain color and plant organs can be a potential benefit for the creation of lines with increased resistance to various stresses.

Mycotoxin Production in Fusarium According to Contemporary Species Concepts

2021 ◽  
Vol 59 (1) ◽  
Author(s):  
Gary P. Munkvold ◽  
Robert H. Proctor ◽  
Antonio Moretti
Keyword(s):  
Fusarium Species ◽  
Pathogenic Fungi ◽  
Species Concepts ◽  
Classification Systems ◽  
Individual Species ◽  
Annual Review ◽  
Publication Date ◽  
Mycotoxin Production ◽  
Depth Of Knowledge ◽  
Genus Fusarium

Fusarium is one of the most important genera of plant-pathogenic fungi in the world and arguably the world's most important mycotoxin-producing genus. Fusarium species produce a staggering array of toxic metabolites that contribute to plant disease and mycotoxicoses in humans and other animals. A thorough understanding of the mycotoxin potential of individual species is crucial for assessing the toxicological risks associated with Fusarium diseases. There are thousands of reports of mycotoxin production by various species, and there have been numerous attempts to summarize them. These efforts have been complicated by competing classification systems based on morphology, sexual compatibility, and phylogenetic relationships. The current depth of knowledge of Fusarium genomes and mycotoxin biosynthetic pathways provides insights into how mycotoxin production is distributed among species and multispecies lineages (species complexes) in the genus as well as opportunities to clarify and predict mycotoxin risks connected with known and newly described species. Here, we summarize mycotoxin production in the genus Fusarium and how mycotoxin risk aligns with current phylogenetic species concepts. Expected final online publication date for the Annual Review of Phytopathology, Volume 59 is August 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

scholarly journals Species Composition and Toxigenic Potential of Fusarium Isolates Causing Fruit Rot of Sweet Pepper in China

Toxins ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 690 ◽  
Author(s):  
Jianhua Wang ◽  
Shuangxia Wang ◽  
Zhiyong Zhao ◽  
Shanhai Lin ◽  
François Van Hove ◽  
...  
Keyword(s):  
Fusarium Species ◽  
Fusaric Acid ◽  
Sweet Pepper ◽  
Fruit Rot ◽  
Limited Information ◽  
Liquid Chromatography Mass Spectrometry ◽  
Spectrometry Method ◽  
Mycotoxin Production ◽  
Mycotoxin Contamination ◽  
Pepper Fruit

Apart from causing serious yield losses, various kinds of mycotoxins may be accumulated in plant tissues infected by Fusarium strains. Fusarium mycotoxin contamination is one of the most important concerns in the food safety field nowadays. However, limited information on the causal agents, etiology, and mycotoxin production of this disease is available on pepper in China. This research was conducted to identify the Fusarium species causing pepper fruit rot and analyze their toxigenic potential in China. Forty-two Fusarium strains obtained from diseased pepper from six provinces were identified as F. equiseti (27 strains), F. solani (10 strains), F. fujikuroi (five strains). This is the first report of F. equiseti, F. solani and F. fujikuroi associated with pepper fruit rot in China, which revealed that the population structure of Fusarium species in this study was quite different from those surveyed in other countries, such as Canada and Belgium. The mycotoxin production capabilities were assessed using a well-established liquid chromatography mass spectrometry method. Out of the thirty-six target mycotoxins, fumonisins B1 and B2, fusaric acid, beauvericin, moniliformin, and nivalenol were detected in pepper tissues. Furthermore, some mycotoxins were found in non-colonized parts of sweet pepper fruit, implying migration from colonized to non-colonized parts of pepper tissues, which implied the risk of mycotoxin contamination in non-infected parts of food products.

scholarly journals Effects of waterlogging stress on plant-pathogen interaction between Fusarium poae and wheat/ barley

2019 ◽  
Vol 41 (1) ◽  
pp. 42629 ◽  
Author(s):  
Mauro Martinez ◽  
Agustín Francisco Arata ◽  
Laura Lázaro ◽  
Sebastian Alberto Stenglein ◽  
María Inés Dinolfo
Keyword(s):  
Yield Components ◽  
Grain Quality ◽  
Abiotic Factors ◽  
Fusarium Species ◽  
Fungal Growth ◽  
Waterlogging Stress ◽  
Fusarium Poae ◽  
Waterlogging Treatment ◽  
Favorable Conditions

Waterlogging stress is one of the abiotic factors which causes damage to crops affecting yield components and grain quality of wheat and barley. On the other hand, Fusarium poae is one of the most common Fusarium species isolated from wheat and barley. The aim of this study was to evaluate the effects of waterlogging and F. poae on disease parameters, yield components and grain quality of durum and bread wheat and barley. The experiment was carried out using pots under greenhouse conditions. Four treatments were applied: control/control (W0F0), control/F. poae (W0F1), waterlogging/control (W1F0) and waterlogging/F. poae (W1F1). The results showed that incidence, severity and FHB index of F. poae were higher in W0F1 compared to W1F1 suggesting that waterlogging treatment would be generating no favorable conditions for fungal growth. Therefore, yield components and grain composition and quality were significantly affected by the Fusarium presence and waterlogging treatment which could induce changes in parameters mainly related to the industrial quality of wheat and barley. These results highlight the behavior of wheat and barley under the combination of abiotic and biotic stress.

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