Biological control of potato common scab by Bacillus amyloliquefaciens Ba01

Potato common scab, which is caused by soil-borne Streptomyces species, is a severe plant disease that results in a significant reduction in the economic value of potatoes worldwide. Due to the lack of efficacious pesticides, crop rotations, and resistant potato cultivars against the disease, we inv...

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Bibliographic Details
Published in:PloS one 2018-04, Vol.13 (4), p.e0196520-e0196520
Main Authors: Lin, Chih, Tsai, Chia-Hsin, Chen, Pi-Yu, Wu, Chia-Yen, Chang, Ya-Lin, Yang, Yu-Liang, Chen, Ying-Lien
Format: Article
Language:English
Subjects:
Agricultural biotechnology
Agricultural economics
Bacillus
Bacillus amyloliquefaciens
Biological control
Biological pest control
Biology and Life Sciences
Biosynthesis
Control
Crop rotation
Cultivars
Disease
Disease control
Diseases and pests
Genomes
Iturin A
Mass spectrometry
Mass spectroscopy
Maximum likelihood method
Medicine and Health Sciences
Metabolites
Methods
Mitochondrial DNA
Pesticides
Phylogenetics
Plant diseases
Plant pathology
Potato common scab
Potatoes
Research and Analysis Methods
Scab
Scabies
Secondary metabolites
Species
Sporulation
Streptomyces
Surfactin
Tubers
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Summary:Potato common scab, which is caused by soil-borne Streptomyces species, is a severe plant disease that results in a significant reduction in the economic value of potatoes worldwide. Due to the lack of efficacious pesticides, crop rotations, and resistant potato cultivars against the disease, we investigated whether biological control can serve as an alternative approach. In this study, multiple Bacillus species were isolated from healthy potato tubers, and Bacillus amyloliquefaciens Ba01 was chosen for further analyses based on its potency against the potato common scab pathogen Streptomyces scabies. Ba01 inhibited the growth and sporulation of S. scabies and secreted secondary metabolites such as surfactin, iturin A, and fengycin with potential activity against S. scabies as determined by imaging mass spectrometry. In pot assays, the disease severity of potato common scab decreased from 55.6 ± 11.1% (inoculated with S. scabies only) to 4.2 ± 1.4% (inoculated with S. scabies and Ba01). In the field trial, the disease severity of potato common scab was reduced from 14.4 ± 2.9% (naturally occurring) to 5.6 ± 1.1% after Ba01 treatment, representing evidence that Bacillus species control potato common scab in nature.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0196520