Bacterial Spot of Cowpea

Gardner, M. W.; Kendrick, J. B.

doi:10.1126/science.57.1470.275

Cited by 28 publications

(51 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Starch utilisation has historically provided a point of variation for the differentiation of populations of BLS since the early description of X. campestris pv. vesicatoria (Doidge 1921;Gardner and Kendrick 1921). Variable starch utilisation has been noted amongst isolates of X. euvesicatoria (Bouzar et al 1996), suggesting some variation in this trait is not unusual and supporting the findings above of unreliable biochemical tests.…”

Section: Discussionsupporting

confidence: 61%

Identification of Xanthomonas species associated with bacterial leaf spot of tomato, capsicum and chilli crops in eastern Australia

Roach

Mann

Gambley³

et al. 2017

Eur J Plant Pathol

View full text Add to dashboard Cite

Several species of Xanthomonas cause bacterial leaf spot, a disease that affects solanaceous crops worldwide. The diversity of 64 Australian isolates of Xanthomonas spp. associated with bacterial leaf spot in tomato, capsicum and chilli crops in eastern Australia was determined using multi-locus sequence analysis of atpD, dnaK, efp and gyrB genes, species-specific PCR assays and biochemical analyses. At least five species of Xanthomonas associated with bacterial leaf spot were identified in Australian tomato, capsicum and chilli crops and their pathogenicity assessed. Phylogenetic and biochemical analyses identified X. euvesicatoria, X. perforans and X. vesicatoria as the most frequently recovered pathogenic species. Non-pathogenic and weakly pathogenic species were also identified. The suitability of the identification methods used and the implications of the detection of these species will be discussed.Keywords amylolytic . pectolytic . Solanaceae . disease management IntroductionBacterial leaf spot (BLS) is a disease of solanaceous crops that occurs worldwide, especially in warm and humid climates (Jones et al. 2014). Several species of Xanthomonas are reported to cause BLS of tomato (Solanum lycopersicum), capsicum and chilli (Capsicum annuum) . The symptoms of BLS are small, brown, angular, water-soaked lesions on leaves, stems and fruit, and result in defoliation and direct fruit damage. Severe infection may result in extensive damage to crops with significant yield losses (Pernezny et al. 2003). Species reported to cause BLS all produce similar symptoms on their hosts, making precise diagnosis difficult from visual symptoms alone. The impact of pathological convergence and importance of phylogenetic testing in the case of BLS are further highlighted by Hajri et al. (2009). The causal bacteria are spread by wind and water, and may survive in crop residues, weeds and volunteer plants (Jones et al. 1986). A link between field disease and seed contamination has Eur J Plant Pathol (2018) 150:595-608

show abstract

Section: Discussionsupporting

confidence: 61%

Identification of Xanthomonas species associated with bacterial leaf spot of tomato, capsicum and chilli crops in eastern Australia

Roach

Mann

Gambley³

et al. 2017

Eur J Plant Pathol

View full text Add to dashboard Cite

show abstract

“…Ethel M. Doidge (Doidge, 1921) originally identified the causal agent in South Africa as Bacterium vesicatorium. In the same year, Gardner and Kendrick (1921) identified a similar organism in the United States, naming it Bacterium exitiosum. When they became aware of Doidge's work, they deferred to her taxonomy and adopted B. vesicatorium as the name of the causal agent (Gardner & Kendrick, 1921).…”

Section: Introductionmentioning

confidence: 99%

“…In the same year, Gardner and Kendrick (1921) identified a similar organism in the United States, naming it Bacterium exitiosum. When they became aware of Doidge's work, they deferred to her taxonomy and adopted B. vesicatorium as the name of the causal agent (Gardner & Kendrick, 1921). However, they noted one difference between the two strains : the bacterium isolated by Doidge was feebly amylolytic, whereas their strains were strongly amylolytic.…”

Section: Introductionmentioning

confidence: 99%

Systematic analysis of xanthomonads (Xanthomonas spp.) associated with pepper and tomato lesions.

Jones¹,

Bouzar²,

Stall³

et al. 2000

International Journal of Systematic and Evolutionary Microbiology

131

View full text Add to dashboard Cite

The taxonomy and evolutionary relationships among members of the genus Xanthomonas associated with tomato and pepper have been a matter of considerable controversy since their original description in 1921. These bacteria, which are a major affliction of tomato and pepper crops in warm and humid regions, were originally described as a single species, but subsequent research has shown the existence of at least two genetic groups differentiated by physiological, biochemical and pathological characteristics. This work synthesizes the findings from several approaches, including pathogenicity tests, enzymic activity, restriction fragment analysis of the entire genome, DNA-DNA hybridization and RNA sequence comparisons based on a 2097 base sequence comprising the 16S rRNA gene, the intergenic spacer located between the 16S and 23S rRNA genes and a small region of the 23S rRNA gene. Within the group of xanthomonads pathogenic on pepper and tomato four distinct phenotypic groups exist, of which three form distinct genomic species. These include Xanthomonas axonopodis pv. vesicatoria (A and C group), Xanthomonas vesicatoria (B group) and Xanthomonas gardneri (D group). On the basis of phenotypic and genotypic differences between A-and C-group strains, the C strains should be considered as a subspecies within Xanthomonas axonopodis pv. vesicatoria.

show abstract

“…Bacterial spot of Lycopersicon esculentum was first reported in South Africa and the US (Doidge, 1921;Gardner & Kendrick, 1921), and was first described on Capsicum annuum in Florida (Gardner & Kendrick 1923). The disease has since been observed in areas of all continents where Lycopersicon esculentum and Capsicum annuum are cultivated.…”

Section: Introductionmentioning

confidence: 99%

“…Group D strains, originally identified in the former Yugoslavia ( Sutic, 1957) and including identical strains from Costa Rica, maintained species status as X. gardneri (Jones et al, 2004). A new species, X. euvesicatoria, was proposed to distinguish the weakly amylolytic group A strains originally isolated in South Africa (Doidge, 1921) from the starch-degrading group C strains originally isolated in the US (Gardner & Kendrick, 1921) which were designated as X. perforans. The bacterial spot pathogens currently fall into four validly described species (X. vesicatoria, X. euvesicatoria, X. perforans and X. gardneri) and X. axonopodis pv.…”

Section: Introductionmentioning

confidence: 99%

PM 7/110 (1) Xanthomonas spp. (Xanthomonas euvesicatoria, Xanthomonas gardneri, Xanthomonas perforans, Xanthomonas vesicatoria) causing bacterial spot of tomato and sweet pepper

2013

EPPO Bulletin

View full text Add to dashboard Cite

Bacterial Spot of Cowpea

Cited by 28 publications

References 0 publications

Identification of Xanthomonas species associated with bacterial leaf spot of tomato, capsicum and chilli crops in eastern Australia

Identification of Xanthomonas species associated with bacterial leaf spot of tomato, capsicum and chilli crops in eastern Australia

Systematic analysis of xanthomonads (Xanthomonas spp.) associated with pepper and tomato lesions.

PM 7/110 (1) Xanthomonas spp. (Xanthomonas euvesicatoria, Xanthomonas gardneri, Xanthomonas perforans, Xanthomonas vesicatoria) causing bacterial spot of tomato and sweet pepper

Contact Info

Product

Resources

About