Evaluation of potential biocontrol agent for aflatoxin in Argentinean peanuts

Zanón, María Silvina Alaniz; Chiotta, María Laura; Giaj-Merlera, G.; Barros, Germán; Chulze, Sofía Noemí

doi:10.1016/j.ijfoodmicro.2013.01.017

Cited by 57 publications

(33 citation statements)

References 30 publications

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“…Garcia, Ramos, Sanchis, and Marin (2012) also demonstrated that the extract of Equisetum arvense and a mixture 1:1 of Equisetum arvense and Stevia rebaudiana is effective against growth of A. flavus and subsequent production of aflatoxin under pre-harvest conditions. Alaniz Zanon, Chiotta, Giaj-Merlera, Barros, and Chulze (2013) also observed 71% reduction in AF contamination in soils and in groundnuts when an AF competitive exclusion strain of A. flavus AFCHG2 was applied to Argentinian groundnuts. Similarly, Weaver et al.…”

Section: Innovative Management Strategies Of Af Reductionmentioning

confidence: 69%

Innovative technologies to manage aflatoxins in foods and feeds and the profitability of application – A review

Udomkun¹,

et al. 2017

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Aflatoxins are mainly produced by certain strains of Aspergillus flavus, which are found in diverse agricultural crops. In many lower-income countries, aflatoxins pose serious public health issues since the occurrence of these toxins can be considerably common and even extreme. Aflatoxins can negatively affect health of livestock and poultry due to contaminated feeds. Additionally, they significantly limit the development of international trade as a result of strict regulation in high-value markets. Due to their high stability, aflatoxins are not only a problem during cropping, but also during storage, transport, processing, and handling steps. Consequently, innovative evidence-based technologies are urgently required to minimize aflatoxin exposure. Thus far, biological control has been developed as the most innovative potential technology of controlling aflatoxin contamination in crops, which uses competitive exclusion of toxigenic strains by non-toxigenic ones. This technology is commercially applied in groundnuts maize, cottonseed, and pistachios during pre-harvest stages. Some other effective technologies such as irradiation, ozone fumigation, chemical and biological control agents, and improved packaging materials can also minimize post-harvest aflatoxins contamination in agricultural products. However, integrated adoption of these pre- and post-harvest technologies is still required for sustainable solutions to reduce aflatoxins contamination, which enhances food security, alleviates malnutrition, and strengthens economic sustainability.

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Section: Innovative Management Strategies Of Af Reductionmentioning

confidence: 69%

Innovative technologies to manage aflatoxins in foods and feeds and the profitability of application – A review

Udomkun¹,

et al. 2017

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“…This form of competitive exclusion of toxigenic strains by non-aflatoxigenic biocontrol strains has been demonstrated under field conditions in cotton (Cotty, 1994), peanuts (Dorner, 2005; Alaniz Zanon et al, 2013) and maize (Abbas et al, 2006). …”

Section: Atoxigenic Strain and Genetic Variation In Aflatoxin Controlmentioning

confidence: 85%

Biodiversity of Aspergillus section Flavi in Europe in relation to the management of aflatoxin risk

2014

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Aflatoxins and the producing fungi Aspergillus section Flavi are widely known as the most serious and dangerous mycotoxin issue in agricultural products. In Europe, before the outbreak of aflatoxins on maize (2003–2004) due to new climatic conditions, their contamination was confined to imported foods. Little information is available on molecular biodiversity and population structure of Aspergillus section Flavi in Europe. Preliminary reports evidenced the massive presence of Aspergillus flavus L -morphotype as the predominant species in maize field, no evidence of the highly toxigenic S-morphotype and of other aflatoxigenic species are reported. The risk of a shift in traditional occurrence areas for aflatoxins is expected in the world and in particular in South East of Europe due to the increasing average temperatures. Biological control of aflatoxin risk in the field by atoxigenic strains of A. flavus starts to be widely used in Africa and USA. Studies are necessary on the variation of aflatoxin production in populations of A. flavus to characterize stable atoxigenic A. flavus strains. The aim of present article is to give an overview on biodiversity and genetic variation of Aspergillus section Flavi in Europe in relation to the management of aflatoxins risk in the field.

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“…Table 2 presents a summary of results from several laboratories showing aflatoxin concentrations after treatments with several different biocontrol A. flavus and of several different crops. In some studies the reported reduction in aflatoxin content in treated versus untreated fields is as much as 20-fold (Dorner et al, 2003; Dorner, 2009, 2010; Abbas et al, 2011; Zanon et al, 2013). These data are for experimental laboratory studies where treatments were presumably done under optimized and highly controlled conditions.…”

Section: Efficacy Of Biocontrol By Non-aflatoxigenic Isolates Of a Fmentioning

confidence: 99%

Non-aflatoxigenic Aspergillus flavus to prevent aflatoxin contamination in crops: advantages and limitations

2014

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Aspergillus flavus is a diverse assemblage of strains that include aflatoxin-producing and non-toxigenic strains with cosmopolitan distribution. The most promising strategy currently being used to reduce preharvest contamination of crops with aflatoxin is to introduce non-aflatoxin (biocontrol) A. flavus into the crop environment. Whether or not introduction of biocontrol strains into agricultural fields is enough to reduce aflatoxin contamination to levels required for acceptance of the contaminated food as fit for consumption is still unknown. There is no question that biocontrol strains are able to reduce the size of the populations of aflatoxin-producing strains but the available data suggests that at most only a four- to five-fold reduction in aflatoxin contamination is achieved. There are many challenges facing this strategy that are both short term and long term. First, the population biology of A. flavus is not well understood due in part to A. flavus’s diversity, its ability to form heterokaryotic reproductive forms, and its unknown ability to survive for prolonged periods after application. Second, biocontrol strains must be selected that are suitable for the environment, the type of crop, and the soil into which they will be introduced. Third, there is a need to guard against inadvertent introduction of A. flavus strains that could impose an additional burden on food safety and food quality, and fourth, with global warming and resultant changes in the soil nutrients and concomitant microbiome populations, the biocontrol strategy must be sufficiently flexible to adapt to such changes. Understanding genetic variation within strains of A. flavus is important for developing a robust biocontrol strategy and it is unlikely that a “one size fits all” strategy will work for preharvest aflatoxin reduction.

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Evaluation of potential biocontrol agent for aflatoxin in Argentinean peanuts

Cited by 57 publications

References 30 publications

Innovative technologies to manage aflatoxins in foods and feeds and the profitability of application – A review

Innovative technologies to manage aflatoxins in foods and feeds and the profitability of application – A review

Biodiversity of Aspergillus section Flavi in Europe in relation to the management of aflatoxin risk

Non-aflatoxigenic Aspergillus flavus to prevent aflatoxin contamination in crops: advantages and limitations

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