Characterization of Alternaria strains from Argentinean blueberry, tomato, walnut and wheat

Andersen, Birgitte; Nielsen, Kristian Fog; Pinto, Virginia Fernández; Patriarca, Andrea

doi:10.1016/j.ijfoodmicro.2014.11.029

Cited by 97 publications

(105 citation statements)

References 46 publications

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“…Toxicological data are limited to the above-mentioned major mycotoxins, and even these data are incomplete, with neither good bioavailability studies nor long-term clinical studies available [12]. Although little is known so far about their properties and toxicological mechanisms, bioavailability, and stability in the digestive tract, Alternaria toxins have been shown to have harmful effects in animals, including cytotoxicity, fetotoxicity, and teratogenicity.…”

Section: Toxicity Of Alternaria Mycotoxinsmentioning

confidence: 99%

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AlternariaMycotoxins in Food and Feed: An Overview

Escrivá

Oueslati

Font

et al. 2017

Journal of Food Quality

147

127

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Alternaria is one of the major mycotoxigenic fungal genera with more than 70 reported metabolites. Alternaria mycotoxins showed notably toxicity, such as mutagenicity, carcinogenicity, induction of DNA strand break, sphingolipid metabolism disruption, or inhibition of enzymes activity and photophosphorylation. This review reports on the toxicity, stability, metabolism, current analytical methods, and prevalence of Alternaria mycotoxins in food and feed through the most recent published research. Half of the publications were focused on fruits, vegetables, and derived products-mainly tomato and apples-while cereals and cereal byproducts represented 38%. The most studied compounds were alternariol, alternariol methyl ether, tentoxin, and tenuazonic acid, but altenuene, altertoxins (I, II, and III), and macrosporin have been gaining importance in recent years. Solid-liquid extraction (50%) with acetonitrile or ethyl acetate was the most common extraction methodology, followed by QuEChERS and dilutiondirect injection (both 14%). High-and ultraperformance liquid chromatography coupled with tandem mass spectrometry was the predominant determination technique (80%). The highest levels of alternariol and alternariol methyl ether were found in lentils, oilseeds, tomatoes, carrots, juices, wines, and cereals. Tenuazonic acid highest levels were detected in cereals followed by beer, while alternariol, alternariol methyl ether, tenuazonic acid, and tentoxin were found in legumes, nuts, and oilseeds.

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Section: Toxicity Of Alternaria Mycotoxinsmentioning

confidence: 99%

“…However, Alternaria spp. produce a variety of other metabolites for which no reports are available due to the lack of pure substances, of which only AME, TeA, AOH, TEN, and ALT are now available on the market [12]. Figure 1 shows the chemical structure of the main Alternaria mycotoxins.…”

Section: Toxicity Of Alternaria Mycotoxinsmentioning

confidence: 99%

AlternariaMycotoxins in Food and Feed: An Overview

Escrivá

Oueslati

Font

et al. 2017

Journal of Food Quality

147

127

View full text Add to dashboard Cite

show abstract

“…Pathogenic Alternaria fungi cause diseases of various crop plants and are present on all continents (Chase, 2005;Perello and Sisterna, 2006). They also infect ornamental plants and fruit trees and shrubs (Windham, 2008;Kakalikova et al, 2009;Pegg et al, 2014, Andersen et al, 2015.…”

Section: Department Of Plant Protecion Faculty Of Biotechnology and Hmentioning

confidence: 99%

Alternaria alternata – the main causal agent of disease symptoms in juniper, rose, yew and highbush blueberry in nurseries in southern Poland

Nadziakiewicz

Kurzawińska

Mazur

et al. 2018

Folia Horticulturae

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Symptoms of discoloration and necrosis of the leaves/needles and shoots of plants are an increasingly common phenomenon in nurseries. They necessitate the withdrawal of the affected plants from sale, which has significant economic consequences. In 2010-2011, observations were conducted of the health of shrubs in nurseries of the Małopolska province. Disease symptoms were mostly found in juniper (Juniperus horizontalis 'Wiltonii'), rose (ground-cover rose 'Star Profusion'), yew (Taxus × media 'Hillii') and highbush blueberry (Vaccinium corymbosum 'Patriot'). These species were selected for further study. The affected shrubs represented more than 46% of the population of a given species. Fragments of the diseased organs: the leaves or needles, the base of the shoots, and the roots, were collected from the borderline between healthy and diseased tissue, and used to isolate and identify the microorganisms colonizing the diseased parts. The affected organs were found to be inhabited to the largest extent by the fungus Alternaria alternata (Fr.) Keissl., which accounted for 19.7 to 47.5% of the isolates from the tested species of shrubs. There were also large populations of fungi of the genera: Botrytis (up to 9.82%), Cladosporium (up to 5.66%), Colletotrichum (up to 5.13%), Fusarium (up to 18.38%), Mortierella (up to 7.26%), Pestalotia (up to 5.36%), Rhizoctonia (up to 5.36%), Sclerotinia (up to 6.99%), and Trichoderma (up to 17.09%). The fungus A. alternata, being by far the dominant pathogen, was tested for its pathogenicity for the shoots of the chosen species of shrubs. The test was conducted for 14 days in a chamber with parameters so programmed that they reflected the natural conditions at the height of the growing season. The fungus A. alternata exhibited pathogenicity for all of the tested species of shrubs. Necrosis developed on all the inoculated fragments of shoots. The surface area of necrotic lesions was larger on the shoots of juniper and blueberry.

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“…ITD-G8 secreted most of the enzymes evaluated, demonstrating its ability to degrade different substrates and setting the stage for in depth studies in the biotechnology area; this species has only been studied for the production of secondary metabolites (Andersen et al 2015).…”

Section: Itd-g12mentioning

confidence: 99%

Enzymatic Potential of Native Fungal Strains of Agave Residues

et al. 2017

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Twelve strains of fungi from residues of Agave durangensis were isolated and identified by molecular techniques for evaluation of their hydrolytic enzyme production capability. A proportion (50%) of the fungal strains belonged to the Aspergillus genus and the other strains used belonged to Alternaria, Neurospora crassa, Mucor sp, Rhizopus sp., Botryosphaeria sp., and Scytalidium sp. The isolated strains were evaluated for their potential to produce extracellular enzymes using different substrates (cellulose, xylan, inulin, Agave fructans, starch, and tannic acid). It was observed that most of the tested strains were capable of simultaneously secreting cellulases, xylanases, inulinases, fructanases, and laccases. Botryosphaeria sp. ITD-G6 was selected for its evaluation in the production of inulinase, using different substrates. Showing high inulinase activities (5.22 U / mL for Agave waste, 4.37 U/ mL for inulin and 5.00 U / mL for Agave fructans).

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Characterization of Alternaria strains from Argentinean blueberry, tomato, walnut and wheat

Cited by 97 publications

References 46 publications

AlternariaMycotoxins in Food and Feed: An Overview

AlternariaMycotoxins in Food and Feed: An Overview

Alternaria alternata – the main causal agent of disease symptoms in juniper, rose, yew and highbush blueberry in nurseries in southern Poland

Enzymatic Potential of Native Fungal Strains of Agave Residues

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