Abstract
Pantoea ananatis has been identified as a cause of center rot of onion. In the field, onion leaves can become infected with P. ananatis and lead to leaf blight. Infected bulbs often are detected only after harvest; however, it has not been demonstrated experimentally that leaf infection by P. ananatis can lead to bulb infection. In this study, onion leaf infection by P. ananatis leading to bulb infection was investigated. Of 18 strains of P. ananatis isolated from symptomatic onion bulbs grown in New York, 14 were pathogenic in bulb and leaf tissue. Pathogenic strains of P. ananatis caused nonmacerated, yellow-brown coloration in fleshy bulb scales following inoculation of bulbs and incubation for 2 days at 28°C. Subepidermal inoculation of onion leaves with pathogenic strains of P. ananatis resulted in gray-white foliar lesions that extended acropetally and basipetally from the points of inoculation. In all, 16% of leaf lesions extended to the onion neck and 11% continued into the bulbs, which developed nonmacerated, yellow-brown scales. Bacteria recovered from the leading edges of lesions had microbiological and molecular characteristics of P. ananatis. This is the first experimental evidence that infection of onion leaves by P. ananatis can lead to bulb infection.
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Claims 6
Claim · model-written summary
Fourteen of 18 P. ananatis strains from onion bulbs were pathogenic in bulb and leaf tissue.
- Taxon
- onion
Allium cepae0 - Interactor
- P. ananatisPantoea ananatise0pathogen
- Outcome
- pathogenic in bulb and leaf tissuee0
- Value
- 14e0
- Setting
- New Yorke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of 18 strains of P. ananatis isolated from symptomatic onion bulbs grown in New York, 14 were pathogenic in bulb and leaf tissue”
Claim · model-written summary
Pathogenic P. ananatis strains caused nonmacerated yellow-brown coloration in inoculated bulb scales.
- Taxon
- OnionAllium cepat0
- Treatment
- inoculation of bulbse0
- Interactor
- P. ananatisPantoea ananatise0pathogen
- Outcome
- nonmacerated, yellow-brown coloration in fleshy bulb scalese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenic strains of P. ananatis caused nonmacerated, yellow-brown coloration in fleshy bulb scales following inoculation of bulbs and incubation for 2 days at 28°C”
t0“Onion Leaves”
Claim · model-written summary
Subepidermal leaf inoculation caused gray-white lesions extending in both directions from inoculation points.
- Taxon
- onionAllium cepae0
- Treatment
- Subepidermal inoculation of onion leaves with pathogenic strains of P. ananatise0
- Interactor
- P. ananatisPantoea ananatise0pathogen
- Outcome
- gray-white foliar lesionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Subepidermal inoculation of onion leaves with pathogenic strains of P. ananatis resulted in gray-white foliar lesions that extended acropetally and basipetally from the points of inoculation”
Claim · model-written summary
Sixteen percent of onion leaf lesions extended to the neck.
- Taxon
- onionAllium cepae0
- Outcome
- leaf lesions extended to the onion necke0
- Value
- 16%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“16% of leaf lesions extended to the onion neck”
Claim · model-written summary
Eleven percent of onion leaf lesions continued into bulbs, which developed yellow-brown scales.
- Taxon
- OnionAllium cepat0
- Outcome
- continued into the bulbse0
- Value
- 11%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“11% continued into the bulbs, which developed nonmacerated, yellow-brown scales”
t0“Onion Leaves”
Claim · model-written summary
Bacteria at lesion leading edges had P. ananatis characteristics.
- Taxon
- OnionAllium cepat0
- Interactor
- P. ananatisPantoea ananatise0pathogen
- Outcome
- microbiological and molecular characteristics of P. ananatise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacteria recovered from the leading edges of lesions had microbiological and molecular characteristics of P. ananatis”
t0“Onion Leaves”
The same questions in other papers
inoculation · disease · Allium cepa (onion)Positive and negative results
26 papers in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
45 papers more in this group
See all 49 papers →inoculation · Pantoea ananatis · Allium cepa (onion)Results agree
2 papers in the same direction as this paper
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.