Evaluation of Mycotoxin Production and Phytopathogenicity of the Entomopathogenic Fungi Fusarium caatingaense and F. pernambucanum from Brazil

Fusarium incarnatum - equiseti species complex (FIESC) is considered as one of the richest insecticolous species. Fusarium species synthesize toxic secondary metabolites that are not fully understood. Mycotoxin production and pathogenicity on germinating seeds, seedlings, and leaves must be carefull...

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Bibliographic Details
Published in:Current microbiology 2021-04, Vol.78 (4), p.1218-1226
Main Authors: de H. C. Maciel, Marília, do Amaral, Ana Cláudia T., da Silva, Túlio Diego, Bezerra, Jadson D. P., de Souza-Motta, Cristina M., da Costa, Antonio Félix, Tiago, Patricia Vieira, de Oliveira, Neiva Tinti
Format: Article
Language:English
Subjects:
Beans
Beauvericin
Biological control
Biomedical and Life Sciences
Biotechnology
Brazil
Cereals
Corn
Crop diseases
Deoxynivalenol
Entomopathogenic fungi
French beans
Fungi
Fusarium
Inoculum
Insects
Life Sciences
Metabolites
Microbiology
Mycotoxins
Pathogenicity
Pathogens
Pest control
Pests
Phaseolus lunatus
Phaseolus vulgaris
Secondary metabolites
Seedlings
Seeds
Spraying
Toxins
Vegetables
Vigna unguiculata
Virulence
Zea mays
Zearalenone
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Summary:Fusarium incarnatum - equiseti species complex (FIESC) is considered as one of the richest insecticolous species. Fusarium species synthesize toxic secondary metabolites that are not fully understood. Mycotoxin production and pathogenicity on germinating seeds, seedlings, and leaves must be carefully studied for the use of Fusarium species in the biological control of insect pests. In this study, we evaluated the mycotoxin production and phytopathogenic potential of entomopathogenic strains of Fusarium sulawesiensis (1), F. pernambucanum (3), and F. caatingaense (23). The phytopathogenicity tests of F. caatingaense (URM 6776, URM 6777, URM 6778, URM 6779, and URM 6782) were performed during the development of bean ( Phaseolus vulgaris , Vigna unguiculata , and Phaseolus lunatus ), and corn ( Zea mays ) seedlings, using four treatments (soil infestation with the inoculum, spraying on leaves, root dip, and negative control). The mycotoxins, monoacetyl-deoxynivalenols (AcDON), deoxynivalenol (DON), beauvericin (BEA), fusarenone-X (FUS), T-2 toxin (T2), diacetoxyscirpenol (DAS), and zearalenone (ZEA), were detected in the study; BEA (detected in 25 strains) and FUS (detected in 21 strains) were found to be predominant. None of the strains showed any ability to cause disease or virulence in beans and corn. The FIESC strains showed a highly variable production of mycotoxins without the potential to be used as phytopathogenic agents for the cultures tested.
ISSN:0343-8651
1432-0991
DOI:10.1007/s00284-021-02387-y