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Int J Food Microbiol. 2015 Jul 16;205:98-104. doi: 10.1016/j.ijfoodmicro.2015.04.001. Epub 2015 Apr 8.

Efficacy of zinc compounds in controlling Fusarium head blight and deoxynivalenol formation in wheat (Triticum aestivum L.).

Author information

1
Laboratory of Mycotoxicology and Food Contaminants, Food Science and Technology Department, Center of Agricultural Sciences, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil. Electronic address: geovanasavi@gmail.com.
2
Laboratory of Mycotoxicology and Food Contaminants, Food Science and Technology Department, Center of Agricultural Sciences, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil.
3
Plant Science Department, Center of Agricultural Sciences, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil.

Abstract

The efficiency of zinc compounds (zinc sulfate, ZnSO4 and zinc oxide, ZnO in regular and nanosize, respectively) on wheat plants was evaluated against growth of Fusarium graminearum and DON formation. In addition, any possible effects on the grain microstructures were observed by scanning electron microscopy (SEM), and the remaining residue of Zn on wheat plants was analyzed. The plants were inoculated with F. graminearum and treated with Zn compounds (100mM) onto spikelets at the anthesis stage. When wheat plants reached maturation, grains were harvested and evaluated for Fusarium (number of colonies, CFU/g), DON formation, and SEM observation, followed by determination of possible remaining Zn residue. The groups treated with ZnSO4 and ZnO-NP showed a reduction in number of CFU of F. graminearum when compared to the control. Similarly for DON formation, i.e. the toxin was reduced to non-detected levels in the treated group. ZnO-NP efficiently reduced F. graminearum and DON formation in the grains at low concentration. Zn remained within the international recommended level for consumption and the treatment did not cause any damage to wheat grains. New strategies of control using Zn compounds in addition to conventional treatments could increase the efficiency against FBH and DON formation.

KEYWORDS:

Control; DON; Fusarium head blight; Wheat; Zinc; Zinc oxide (PubChem CID: 14806); Zinc sulfate (PubChem CID: 24424)

[Indexed for MEDLINE]

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