Fire Blight of Apple, Caused by <i>Erwinia amylovora</i>, a New Disease in Korea

Myung, I.-S.; Lee, J.-Y.; Yun, M.-J.; Lee, Y.-H.; Lee, Y.-K.; Park, D.-H.; Oh, Chang‐Sik

doi:10.1094/pdis-01-16-0024-pdn

Cited by 53 publications

(23 citation statements)

References 4 publications

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“…Other studies performed with the reference strain B. velezensis FZB42 associated the antagonistic activity against Erwinia amylovora , the causal agent of fire blight on apples, pears, and some other members of the family Rosaceae ( Myung et al, 2016 ), with the production of difficidin and bacilysin ( Chen et al, 2009b ). The results obtained herein indicated that two clusters found in the genome of CMRP 4490 genome showed 100% similarity to the database MiBiG of the synthesis of these molecules, with potential against bacterial diseases not explored yet.…”

Section: Discussionmentioning

confidence: 99%

Genomic Insights Into the Antifungal Activity and Plant Growth-Promoting Ability in Bacillus velezensis CMRP 4490

et al. 2021

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The main objective of this study was to evaluate Bacillus velezensis strain CMRP 4490 regarding its ability to inhibit soil-borne plant pathogens and to increase plant growth. The study included evaluation of in vitro antifungal control, sequencing the bacterial genome, mining genes responsible for the synthesis of secondary metabolites, root colonization ability, and greenhouse studies for the assessment of plant growth–promoting ability. The strain was obtained from soil samples in the north of Paraná in Brazil and was classified as a B. velezensis, which is considered a promising biological control agent. In vitro assay showed that B. velezensis CMRP 4490 presented antagonistic activity against Sclerotinia sclerotiorum, Macrophomina phaseolina, Botrytis cinerea, and Rhizoctonia solani with a mycelial growth inhibition of approximately 60%, without any significant difference among them. To well understand this strain and to validate its effect on growth-promoting rhizobacteria, it was decided to explore its genetic content through genome sequencing, in vitro, and greenhouse studies. The genome of CMRP 4490 was estimated at 3,996,396 bp with a GC content of 46.4% and presents 4,042 coding DNA sequences. Biosynthetic gene clusters related to the synthesis of molecules with antifungal activity were found in the genome. Genes linked to the regulation/formation of biofilms, motility, and important properties for rhizospheric colonization were also found in the genome. Application of CMRP 4490 as a coating film on soybean increased from 55.5 to 64% on germination rates when compared to the control; no differences were observed among treatments for the maize germination. The results indicated that B. velezensis CMRP 4490 could be a potential biocontrol agent with plant growth–promoting ability.

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Section: Discussionmentioning

confidence: 99%

Genomic Insights Into the Antifungal Activity and Plant Growth-Promoting Ability in Bacillus velezensis CMRP 4490

et al. 2021

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“…This disease also spread globally to New Zealand (1919), Europe (1950s) andthe Middle East (1988), most probably through the transport of fire blight-infected plant materials (van der Zwet et al, 2012). Currently, fire blight has been reported in at least 50 countries worldwide (Myung et al, 2016;Rhouma et al, 2014;Soukainen et al, 2015;van der Zwet et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Comparative genomics of Spiraeoideae‐infecting Erwinia amylovora strains provides novel insight to genetic diversity and identifies the genetic basis of a low‐virulence strain

Zeng

Cui

Wang

et al. 2018

Molecular Plant Pathology

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Summary Erwinia amylovora is the causal agent of fire blight, one of the most devastating diseases of apple and pear. Erwinia amylovora is thought to have originated in North America and has now spread to at least 50 countries worldwide. An understanding of the diversity of the pathogen population and the transmission to different geographical regions is important for the future mitigation of this disease. In this research, we performed an expanded comparative genomic study of the Spiraeoideae‐infecting (SI) E. amylovora population in North America and Europe. We discovered that, although still highly homogeneous, the genetic diversity of 30 E. amylovora genomes examined was about 30 times higher than previously determined. These isolates belong to four distinct clades, three of which display geographical clustering and one of which contains strains from various geographical locations (‘Widely Prevalent’ clade). Furthermore, we revealed that strains from the Widely Prevalent clade displayed a higher level of recombination with strains from a clade strictly from the eastern USA, which suggests that the Widely Prevalent clade probably originated from the eastern USA before it spread to other locations. Finally, we detected variations in virulence in the SI E. amylovora strains on immature pear, and identified the genetic basis of one of the low‐virulence strains as being caused by a single nucleotide polymorphism in hfq, a gene encoding an important virulence regulator. Our results provide insights into the population structure, distribution and evolution of SI E. amylovora in North America and Europe.

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“…Since E. amylovora was first discovered in 1780 in the United States, it has been reported globally in Europe, North America, the Middle East and central Asia, and New Zealand ( Van der Zwet et al, 2012 ). In 2015, this disease was reported in apple and pear orchards in South Korea ( Myung et al, 2016 ; Park et al, 2016 ). In the case of E. pyrifoliae , it was first reported in pear orchards in South Korea in 1995 ( Kim et al, 1999 ).…”

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confidence: 99%

Characterization of the Lytic Bacteriophage phiEaP-8 Effective against Both Erwinia amylovora and Erwinia pyrifoliae Causing Severe Diseases in Apple and Pear

et al. 2018

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Fire Blight of Apple, Caused by Erwinia amylovora, a New Disease in Korea

Cited by 53 publications

References 4 publications

Genomic Insights Into the Antifungal Activity and Plant Growth-Promoting Ability in Bacillus velezensis CMRP 4490

Genomic Insights Into the Antifungal Activity and Plant Growth-Promoting Ability in Bacillus velezensis CMRP 4490

Comparative genomics of Spiraeoideae‐infecting Erwinia amylovora strains provides novel insight to genetic diversity and identifies the genetic basis of a low‐virulence strain

Characterization of the Lytic Bacteriophage phiEaP-8 Effective against Both Erwinia amylovora and Erwinia pyrifoliae Causing Severe Diseases in Apple and Pear

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