Promising Antifungal Effect of Rice (Oryza sativa L.), Oat (Avena sativa L.) and Wheat (Triticum aestivum L.) Extracts

The grains contamination is inevitable and many biotic and abiotic factors affect this. Many
species are toxigenic and among them the Aspergillus and Fusarium are also phytopathogenic,
causing diseases that are difficult to control in cereal crops (Dambolena et al., 2012; Lee et al.,
2007). The knowledge about natural resistence against specific fungal genus and its location
in the vegetable might be a strategic way to control the contamination problem (Armando et
al., 2013).

Some researchers have attempted to find these natural compounds products with
antifungal effects for proper that might be recovery from wastes as interesting possibility, for
economic and environment benefits (Pagnussatt et al., 2012b; Viuda-Martos et al., 2008).
Then, simple tools for identify this properties are very useful to technology development
preventing crops environment and human health damage (Zao et al., 2010; Del Río et al.,
2003).

Among the compounds naturally present in plants tissues, some inhibit the microbial activity,
such as alpha-amylase inhibitors which can alter fungal growth (Pagnussatt et al., 2012a;
Pagnussatt et al., 2011a; Figueira et al., 2003). Others proteic compounds are being related to
the expression of the biosynthesis regulatory gene, or even block the activity of the enzyme in
the microorganism or insects metabolism (Lee et al., 2007; Kadozawa et al., 2002).

The screening of these natural antifungal compounds is the first step to select a variety but
recovery them from cereal wastes (Velutti et al., 2004), allowing a sustainable agriculture and
promoting environmental quality is not a frequent evaluation. However, this would be a
promising alternative to limit the fungal contamination.

The antimicrobial activity can be determined by in vitro or application tests. In the screening
method, the crude compounds under study are applied directly on the product and provide
preliminary information about its defense potential. In other type the antimicrobial agent is
applied directly in a culture media and its effect is evaluated by hyphae inhibition or chemical
fungal constituent’s production (Del Río et al., 2003).

For full text: click here

(Author: Fernanda Arnhold Pagnussatt, Cristiana Costa Bretanha, Larine Kupski, Jaqueline Garda-Buffon, Eliana Badiale-Furlong

Published by Macrothink Institute)