Abstract
Abstract The pathogenicity to tobacco of a large set of Phytophthora parasitica isolates has been assessed using several procedures: root inoculation of young plants, leaf inoculation on detached disks and stem inoculation of decapitated plants, with or without healing. Analysing various aspects of the plantpathogen interaction with this array of tests led to the discrimination between three groups of isolates. In the isolates from hosts other than tobacco, none was truly pathogenic to tobacco, and all but one produced parasiticein, a proteinaceous elicitor of the elicitin family which induces a hypersensitive‐like response in tobacco. Isolates producing parasiticein in vitro induced necrotic fleks on the leaves upon inoculation of roots orof, freshly wounded stems. Most tobacco isolates, including all the highly virulent ones, were characterized by a lack of elicitin production. However, those collected in Australia and Zimbabwe differed in that they exhibited reduced virulence, induced leaf, necrotic flecks and produced parasiticein. The incidence of elicitin production on virulence and the significance of two types of tobacco‐pathogenic strains for tobacco pathology are discussed.
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Claims 9
Claim · model-written summary
Host assays discriminated three groups of Phytophthora isolates.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Interactor
- Phytophthora parasitica
Phytophthora nicotianaet0pathogen - Outcome
- discrimination between three groups of isolatese0
- Value
- three groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysing various aspects of the plantpathogen interaction with this array of tests led to the discrimination between three groups of isolates.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
Claim · model-written summary
No isolate from hosts other than tobacco was truly pathogenic to tobacco.
- Taxon
- tobaccoNicotiana tabacume0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- none was truly pathogenic to tobaccoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the isolates from hosts other than tobacco, none was truly pathogenic to tobacco, and all but one produced parasiticein, a proteinaceous elicitor of the elicitin family which induces a hypersensitive‐like response in tobacco.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
Claim · model-written summary
All but one non-tobacco isolate produced parasiticein.
- Taxon
- tobaccoNicotiana tabacume0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- all but one produced parasiticeine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the isolates from hosts other than tobacco, none was truly pathogenic to tobacco, and all but one produced parasiticein, a proteinaceous elicitor of the elicitin family which induces a hypersensitive‐like response in tobacco.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
Claim · model-written summary
Parasiticein induces a hypersensitive-like tobacco response.
- Taxon
- tobaccoNicotiana tabacume0
- Gene
- parasiticeine0
- Outcome
- hypersensitive‐like responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“parasiticein, a proteinaceous elicitor of the elicitin family which induces a hypersensitive‐like response in tobacco.”
Claim · model-written summary
Parasiticein-producing isolates caused leaf necrotic flecks after root or stem inoculation.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- inoculation of roots orof, freshly wounded stemse0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- necrotic fleks on the leavese0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates producing parasiticein in vitro induced necrotic fleks on the leaves upon inoculation of roots orof, freshly wounded stems.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
Claim · model-written summary
Most tobacco isolates, including highly virulent isolates, lacked elicitin production.
- Taxon
- tobaccoNicotiana tabacume0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- lack of elicitin productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most tobacco isolates, including all the highly virulent ones, were characterized by a lack of elicitin production.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
Claim · model-written summary
Australian and Zimbabwean tobacco isolates showed reduced virulence.
- Taxon
- tobaccoNicotiana tabacumt0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- virulencee0
- Direction
- reducede0
- Setting
- Australia and Zimbabwee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those collected in Australia and Zimbabwe differed in that they exhibited reduced virulence, induced leaf, necrotic flecks and produced parasiticein.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
Claim · model-written summary
Australian and Zimbabwean tobacco isolates induced leaf necrotic flecks.
- Taxon
- tobaccoNicotiana tabacumt0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- leaf, necrotic fleckse0
- Setting
- Australia and Zimbabwee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those collected in Australia and Zimbabwe differed in that they exhibited reduced virulence, induced leaf, necrotic flecks and produced parasiticein.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
Claim · model-written summary
Australian and Zimbabwean tobacco isolates produced parasiticein.
- Taxon
- tobaccoNicotiana tabacumt0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- produced parasiticeine0
- Setting
- Australia and Zimbabwee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those collected in Australia and Zimbabwe differed in that they exhibited reduced virulence, induced leaf, necrotic flecks and produced parasiticein.”
t0“Diversity in Pathogenicity to Tobacco and in Elicitin Production among Isolates of Phytophthora parasitica”
The same questions in other papers
inoculation · Phytophthora nicotianae · Nicotiana tabacum (tobacco)Positive and negative results
8 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →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.