Genetic and phenotypic characterization of Xanthomonas axonopodis pv. maculifoliigardeniae causing bacterial leaf spot of Ixora in Taiwan

2020 ◽  
Vol 168 (7-8) ◽  
pp. 478-489
Author(s):  
Ying‐Ru Lin ◽  
Shin Lee ◽  
Chih‐Hung Lu ◽  
Chia‐Ching Chu
Keyword(s):  
Leaf Spot ◽  
Phenotypic Characterization ◽  
Bacterial Leaf Spot ◽  
Xanthomonas Axonopodis

scholarly journals Genotypic and Phenotypic Characterization of Lettuce Bacterial Pathogen Xanthomonas hortorum pv. vitians Populations Collected in Quebec, Canada

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2386
Author(s):  
Pierre-Olivier Hébert ◽  
Martin Laforest ◽  
Dong Xu ◽  
Marie Ciotola ◽  
Mélanie Cadieux ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Genome Wide Association Study ◽  
De Novo ◽  
Association Studies ◽  
Genome Wide Association ◽  
Phenotypic Characterization ◽  
Genome Wide Association Studies ◽  
Bacterial Leaf Spot ◽  
Eastern Canada ◽  
Genome Wide

Bacterial leaf spot of lettuce, caused by Xanthomonas hortorum pv. vitians, is an economically important disease worldwide. For instance, it caused around 4 million CAD in losses in only a few months during the winter of 1992 in Florida. Because only one pesticide is registered to control this disease in Canada, the development of lettuce cultivars tolerant to bacterial leaf spot remains the most promising approach to reduce the incidence and severity of the disease in lettuce fields. The lack of information about the genetic diversity of the pathogen, however, impairs breeding programs, especially when disease resistance is tested on newly developed lettuce germplasm lines. To evaluate the diversity of X. hortorum pv. vitians, a multilocus sequence analysis was performed on 694 isolates collected in Eastern Canada through the summers of 2014 to 2017 and two isolates in 1996 and 2007. All isolates tested were clustered into five phylogroups. Six pathotypes were identified following pathogenicity tests conducted in greenhouses, but when phylogroups were compared with pathotypes, no correlation could be drawn. However, in vitro production of xanthan and xanthomonadins was investigated, and isolates with higher production of xanthomonadins were generally causing less severe symptoms on the tolerant cultivar Little Gem. Whole-genome sequencing was undertaken for 95 isolates belonging to the pathotypes identified, and de novo assembly made with reads unmapped to the reference strain’s genome sequence resulted in 694 contigs ranging from 128 to 120,795 bp. Variant calling was performed prior to genome-wide association studies computed with single-nucleotide polymorphisms (SNPs), copy-number variants and gaps. Polymorphisms with significant p-values were only found on the cultivar Little Gem. Our results allowed molecular identification of isolates likely to cause bacterial leaf spot of lettuce, using two SNPs identified through genome-wide association study.

scholarly journals Bacterial leaf spot of Guazuma ulmifolia (Lam.) caused by Xanthomonas axonopodis

2009 ◽  
Vol 35 (2) ◽  
pp. 146-147
Author(s):  
Marli de Fátima Stradioto Papa ◽  
Suzete Aparecida Lanza Destéfano ◽  
Lucas Mateus Rivero Rodrigues ◽  
Mariana Ferreira ◽  
Júlio Rodrigues Neto
Keyword(s):  
Leaf Spot ◽  
Bacterial Leaf Spot ◽  
Xanthomonas Axonopodis ◽  
Guazuma Ulmifolia

scholarly journals First Report of Bacterial Leaf Spot Caused by Xanthomonas axonopodis Infecting Fragrant Sumac in Tennessee

Plant Disease ◽  
2016 ◽  
Vol 100 (9) ◽  
pp. 1946
Author(s):  
F. Baysal-Gurel ◽  
T. Simmons ◽  
M. N. Kabir ◽  
P. Liyanapathiranage
Keyword(s):  
Leaf Spot ◽  
Bacterial Leaf Spot ◽  
Xanthomonas Axonopodis ◽  
First Report

scholarly journals Characterization of Xanthomonas campestris pv. viticola causing bacterial leaf spot of grapes in Maharashtra, India

2019 ◽  
Vol 40 (6) ◽  
pp. 1145-1150
Author(s):  
A.K. Kamble ◽  
◽  
S.D. Sawant ◽  
I.S. Sawant ◽  
S.B. Ghule ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Xanthomonas Campestris ◽  
Bacterial Leaf Spot

scholarly journals First Report of Xanthomonas axonopodis pv. begoniae Causing Bacterial Leaf Spot on Rieger Begonias in Taiwan

Plant Disease ◽  
2019 ◽  
Vol 103 (11) ◽  
pp. 2940-2940
Author(s):  
F.-Y. Lin ◽  
Z.-Q. Fang ◽  
S. Lee ◽  
Y.-H. Wang ◽  
Y.-R. Lin ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Bacterial Leaf Spot ◽  
Xanthomonas Axonopodis ◽  
First Report
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