Bacillus amyloliquefaciens subsp. plantarum strain D747 to control the kiwifruit bacterial canker disease

2022 ◽  
pp. 95-102
Author(s):  
E. Biondi ◽  
D. Schiavi ◽  
S. Perez Fuentealba ◽  
N. Kuzmanovic ◽  
P. Minardi ◽  
...  
Keyword(s):  
Bacillus Amyloliquefaciens ◽  
Bacterial Canker ◽  
Canker Disease

scholarly journals Comparative Genomics and Phylogenetic Analyses Suggest Several Novel Species within the Genus Clavibacter, Including Nonpathogenic Tomato-Associated Strains

2020 ◽  
Vol 86 (6) ◽  
Author(s):  
Ebrahim Osdaghi ◽  
Touraj Rahimi ◽  
S. Mohsen Taghavi ◽  
Maryam Ansari ◽  
Sadegh Zarei ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Comparative Genomics ◽  
Plant Pathogens ◽  
Phylogenetic Analyses ◽  
Taxonomic Status ◽  
Sensu Stricto ◽  
Bacterial Canker ◽  
Agricultural Crops ◽  
Content Type ◽  
Canker Disease

ABSTRACT Members of the genus Clavibacter are economically important bacterial plant pathogens infecting a set of diverse agricultural crops (e.g., alfalfa, corn, potato, tomato, and wheat). Tomato-associated Clavibacter sp. strains account for a great portion of the genetic diversity of the genus, and C. michiganensis sensu stricto (formerly C. michiganensis subsp. michiganensis), causing bacterial canker disease, is considered one of the most destructive seed-borne agents for the crop worldwide. However, current taxonomic descriptions of the genus do not reflect the existing diversity of the strains, resulting in unsatisfactory results in quarantine surveys for the pathogens. In this study, we used all the available genome sequences of Clavibacter sp. strains, including the type strains of newly described subspecies, to provide precise insight into the diversity of tomato-associated members of the genus and further clarify the taxonomic status of the strains using genotypic and phenotypic features. The results of phylogenetic analyses revealed the existence of nine hypothetical new species among the investigated strains. None of the three new subspecies (i.e., C. michiganensis subsp. californiensis, C. michiganensis subsp. chilensis, and C. michiganensis subsp. phaseoli) is included within the tomato-pathogenic C. michiganensis sensu stricto lineage. Although comparative genomics revealed the lack of chp and tomA pathogenicity determinant gene clusters in the nonpathogenic strains, a number of pathogenicity-related genes were noted to be present in all the strains regardless of their pathogenicity characteristics. Altogether, our results indicate a need for a formal taxonomic reconsideration of tomato-associated Clavibacter sp. strains to facilitate differentiation of the lineages in quarantine inspections. IMPORTANCE Clavibacter spp. are economically important bacterial plant pathogens infecting a set of diverse agricultural crops, such as alfalfa, corn, pepper, potato, tomato, and wheat. A number of plant-pathogenic members of the genus (e.g., C. michiganensis sensu stricto and C. sepedonicus, infecting tomato and potato plants, respectively) are included in the A2 (high-risk) list of quarantine pathogens by the European and Mediterranean Plant Protection Organization (EPPO). Although tomato-associated members of Clavibacter spp. account for a significant portion of the genetic diversity in the genus, only the strains belonging to C. michiganensis sensu stricto (formerly C. michiganensis subsp. michiganensis) cause bacterial canker disease of tomato and are subjected to the quarantine inspections. Hence, discrimination between the pathogenic and nonpathogenic Clavibacter sp. strains associated with tomato seeds and transplants plays a pivotal role in the accurate detection and cost-efficient management of the disease. On the other hand, detailed information on the genetic contents of different lineages of the genus would lead to the development of genome-informed specific detection techniques. In this study, we have provided an overview of the phylogenetic and genomic differences between the pathogenic and nonpathogenic tomato-associated Clavibacter sp. strains. We also noted that the taxonomic status of newly introduced subspecies of C. michiganensis (i.e., C. michiganensis subsp. californiensis, C. michiganensis subsp. chilensis, and C. michiganensis subsp. phaseoli) should be reconsidered.

scholarly journals Systematic Analysis and Functional Validation of Citrus Pectin Acetylesterases (CsPAEs) Reveals that CsPAE2 Negatively Regulates Citrus Bacterial Canker Development

2020 ◽  
Vol 21 (24) ◽  
pp. 9429
Author(s):  
Qiang Li ◽  
Jia Fu ◽  
Xiujuan Qin ◽  
Wen Yang ◽  
Jingjing Qi ◽  
...  
Keyword(s):  
Susceptible Variety ◽  
Resistant Variety ◽  
Potential Candidate ◽  
Bacterial Canker ◽  
Citrus Pectin ◽  
Systematic Analysis ◽  
Canker Disease ◽  
Potential Candidate Gene ◽  
Citrus Bacterial Canker ◽  
Canker Development

The present study was designed to serve as a comprehensive analysis of Citrus sinensis (C. sinensis) pectin acetylesterases (CsPAEs), and to assess the roles of these PAEs involved in the development of citrus bacterial canker (CBC) caused by Xanthomonas citri subsp. citri (Xcc) infection. A total of six CsPAEs were identified in the genome of C. sinensis, with these genes being unevenly distributed across chromosomes 3, 6, and 9, and the unassembled scaffolds. A subset of CsPAEs were found to be involved in responses to Xcc infection. In particular, CsPAE2 was identified to be associated with such infections, as it was upregulated in CBC-susceptible variety Wanjincheng and inversely in CBC-resistant variety Calamondin. Transgenic citrus plants overexpressing CsPAE2 were found to be more susceptible to CBC, whereas the silencing of this gene was sufficient to confer CBC resistance. Together, these findings provide evolutionary insights into and functional information about the CsPAE family. This study also suggests that CsPAE2 is a potential candidate gene that negatively contributes to bacterial canker disease and can be used to breed CBC-resistant citrus plants.

Effect of calcium and nitrogen nutrition on bacterial canker disease of tomato

1988 ◽  
Vol 112 (1) ◽  
pp. 113-120 ◽  
Author(s):  
S. Z. Berry ◽  
G. G. Madumadu ◽  
M. Rafique Uddin
Keyword(s):  
Nitrogen Nutrition ◽  
Bacterial Canker ◽  
Canker Disease

scholarly journals Clavibacter michiganensis subsp. capsici subsp. nov., causing bacterial canker disease in pepper

2016 ◽  
Vol 66 (10) ◽  
pp. 4065-4070 ◽  
Author(s):  
Eom-Ji Oh ◽  
Chungyun Bae ◽  
Han-Beoyl Lee ◽  
In Sun Hwang ◽  
Hyok-In Lee ◽  
...  
Keyword(s):  
Bacterial Canker ◽  
Clavibacter Michiganensis ◽  
Canker Disease ◽  
Clavibacter Michiganensis Subsp

scholarly journals Relationships between kiwifruit bacterial canker disease and kiwifruit productivity

2014 ◽  
Vol 67 ◽  
pp. 34-40 ◽  
Author(s):  
K.J. Froud ◽  
N. Cogger ◽  
R.M. Beresford
Keyword(s):  
Pseudomonas Syringae ◽  
Significant Relationship ◽  
Regression Models ◽  
Virulent Strain ◽  
Bacterial Canker ◽  
Infection Status ◽  
Linear Regression Models ◽  
Canker Disease ◽  
Productivity Data ◽  
The Relationship

Bacterial canker disease caused by a virulent strain of Pseudomonas syringae pv actinidiae (PsaV) has affected kiwifruit vines in New Zealand since 2010 This study investigated the association of PsaV with productivity within Hayward and Hort16A varieties PsaV infection status and date of diagnosis for 3309 infected orchards were provided by Kiwifruit Vine Health while Zespri provided productivity data Linear regression models were constructed to determine the relationship between production and PsaV infection in Hayward and Hort16A orchards Results showed a significant relationship between the numbers of weeks PsaV was detected in Hort16A orchards and a reduction in productivity This was likely due to the removal of Hort16A vines or productive areas of canopy in response to the presence of severe symptoms within an orchard A similar significant relationship was also found in Hayward orchards although the reduction in productivity was smaller and took longer to develop than in Hort16A

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