Meyerozyma guilliermondii SQUCC-33Y suppresses postharvest fruit rot of strawberry caused by Alternaria alternata

Strawberry fruits are vulnerable to infection by a broad range of fungal pathogens before and after harvest. In this study, Alternaria spp. strains associated with fruit rot of strawberry were isolated and characterized and the potential of the antagonistic yeast Meyerozyma guilliermondii strain SQU...

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Bibliographic Details
Published in:Australasian plant pathology 2021, Vol.50 (3), p.349-352
Main Authors: Al-Rahbi, B. A. A., Al-Sadi, A. M., Al-Mahmooli, I. H., Al-Maawali, S. S., Al-Mahruqi, N. M. T., Velazhahan, R.
Format: Article
Language:English
Subjects:
Agriculture
Alternaria
Alternaria alternata
Biomedical and Life Sciences
Ecology
Entomology
Fruit rot
Fruits
Fungi
Gene sequencing
Life Sciences
Meyerozyma guilliermondii
Pathogenicity
Pathogens
Plant Pathology
Plant Sciences
Research Note
rRNA
Signs and symptoms
Strawberries
Virulence
Yeast
Yeasts
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Summary:Strawberry fruits are vulnerable to infection by a broad range of fungal pathogens before and after harvest. In this study, Alternaria spp. strains associated with fruit rot of strawberry were isolated and characterized and the potential of the antagonistic yeast Meyerozyma guilliermondii strain SQUCC-33Y for the control of fruit rot of strawberry was evaluated. A total of seven isolates of Alternaria (STR2-STR8) were isolated from strawberry fruits showing symptoms of rot. On the basis of internal transcribed spacer (ITS) ribosomal RNA (rRNA) sequences, these fungal isolates were identified as Alternaria alternata . Pathogenicity tests revealed that most of the strains of A. alternata were pathogenic to strawberry. The measurement of disease severity on strawberry fruits revealed significant differences in the virulence between A. alternata strains. M. guilliermondii restricted the growth of all the strains of A. alternata in dual culture assay. Postharvest treatment of strawberry fruits with M. guilliermondii significantly reduced the fruit rot lesion size caused by A. alternata . This antagonistic yeast has the potential for use as a biofungicide for the control of A. alternata -induced postharvest fruit rot of strawberry.
ISSN:0815-3191
1448-6032
DOI:10.1007/s13313-021-00779-z