Does sorghum phenolic extract have antifungal effect?

This study aimed to evaluate the antifungal effect of SC319 sorghum phenolic extract (SPE) on the Aspergillus , Fusarium , Penicillium , Stenocarpella , Colletotrichum , and Macrophomina genera. SPE was extracted by 20% ethanol and used in four assays: (1) against Fusarium verticillioides in solid (...

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Bibliographic Details
Published in:	Brazilian journal of microbiology Vol. 55; no. 2; pp. 1829 - 1839
Main Authors:	da Conceição, Renata Regina Pereira, Queiroz, Valéria Aparecida Vieira, Simeone, Maria Lúcia Ferreira, da Silva Araújo, Dagma Dionísia, do Carmo, Paulo Henrique Fonseca, de Menezes, Cícero Beserra, Figueiredo, José Edson Fontes, de Resende Stoianoff, Maria Aparecida
Format:	Journal Article
Language:	English
Published:	Cham Springer International Publishing 01-06-2024
Subjects:	Biomedical and Life Sciences Food Microbiology Life Sciences Medical Microbiology Microbial Ecology Microbial Genetics and Genomics Microbiology Mycology Soil and Agricultural Microbiology - Research Paper (L.) Moench Toxigenic fungi Biofungicide Minimum inhibitory concentration Sorghum bicolor (L.) Moench
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Summary:	This study aimed to evaluate the antifungal effect of SC319 sorghum phenolic extract (SPE) on the Aspergillus , Fusarium , Penicillium , Stenocarpella , Colletotrichum , and Macrophomina genera. SPE was extracted by 20% ethanol and used in four assays: (1) against Fusarium verticillioides in solid (PDA) and liquid (PD) potato dextrose media; (2) Minimum Inhibitory Concentration (MIC) assay with 16 fungi isolates; (3) Conidial Germination Rate (CGR) with 14 fungi isolates and (4) Growth Curve (GC) with 11 fungi isolates. There was no reduction in the mycelial growth (colony diameter and dry weight) and in the number of Fusarium verticillioides spores in assay 1 (PDA and PD). The colony's dry weight was almost six times higher in the presence than in the absence of SPE. All SPE samples presented MIC (assay 1) above the maximum concentration tested (5000 µg.mL −1 ) for the 16 isolates. Also, there was no inhibitory effect of SPE on conidia germination rate (CGR). Oppositely, in GC assay, the control had a higher CFU count than the samples with SPE in 24 h. This result suggests that SPE can delay the fungal growth in the first hours of incubation, which is an important finding that may help reduce the severity of fungal diseases in plants. However, further studies are needed to confirm these results, including sorghum genotypes with different profiles of phenolic compounds. Although the SC319 SPE was not effective as an antifungal agent, it may have potential as a growth promoter of beneficial fungi in the food and pharmaceutical industries.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1517-8382 1678-4405 1678-4405
DOI:	10.1007/s42770-024-01327-9