Abstract
Abstract The phenomena of induced resistance and induced susceptibility were investigated in the pea‐ Pseudomonas syringae pv. pisi system, using two pea cultivars, Early Onward and Hurst Green Shaft, and races 1 and 2 of the pathogen. Preliminary treatment with heat‐killed bacteria induced resistance in peas to infection by P. s. pv. pisi; the resistance induced was dependent on the time interval between the preliminary and challenge inoculations. The mechanism of induced resistance appears to vary between the cultivars. Similarly, both races of the pathogen appear to have different resistance‐inducing efficiencies. Resistance in cvs Early Onward and Hurst Green Shaft to the compatible bacterium could not be induced by preliminary inoculation with live cells of an incompatible race. Heat‐killed cells of the races failed to induce the hypersensitive reaction in cultivars that normally show this response when challenged with live avirulent bacteria. Preliminary inoculation with live race 1 cells failed to induce susceptibility in cv. Early Onward to live race 2 cells, irrespective of the challenge inoculation interval. On cv. Hurst Green Shaft, however, preliminary inoculation with live race 2 cells induced limited susceptibility to live race 1 cells. Preliminary treatment with sterile distilled water followed by challenge of the same leaves 24 h later with a compatible race induced a moderate resistance response in both cultivars.
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Claims 9
Claim · model-written summary
Preliminary treatment of pea with heat-killed bacteria induced resistance to infection by P. s. pv. pisi.
- Taxon
- peas
Lathyrus oleraceuse0 - Treatment
- Preliminary treatment with heat-killed bacteriae0
- Interactor
- P. s. pv. pisie0pathogen
- Outcome
- resistancee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary treatment with heat-killed bacteria induced resistance in peas to infection by P. s. pv. pisi”
Claim · model-written summary
The resistance induced in pea depended on the time interval between the preliminary and challenge inoculations.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- time interval between the preliminary and challenge inoculationse0
- Outcome
- resistance inducede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary treatment with heat-killed bacteria induced resistance in peas to infection by P. s. pv. pisi; the resistance induced was dependent on the time interval between the preliminary and challenge inoculations”
Claim · model-written summary
The mechanism of induced resistance appears to vary between the pea cultivars.
- Taxon
- PeaLathyrus oleraceust0
- Material
- cultivarse0
- Outcome
- mechanism of induced resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mechanism of induced resistance appears to vary between the cultivars”
t0“Susceptibility in Pea to Races”
Claim · model-written summary
The two races of the pathogen appear to differ in resistance-inducing efficiency in pea.
- Taxon
- PeaLathyrus oleraceust0
- Interactor
- pathogene0pathogen
- Outcome
- resistance-inducing efficienciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both races of the pathogen appear to have different resistance-inducing efficiencies”
t0“Susceptibility in Pea to Races”
Claim · model-written summary
Resistance in cvs Early Onward and Hurst Green Shaft to the compatible bacterium could not be induced by preliminary inoculation with live cells of an incompatible race.
- Taxon
- PeaLathyrus oleraceust0
- Material
- Early Onward and Hurst Green Shafte0
- Treatment
- preliminary inoculation with live cells of an incompatible racee0
- Interactor
- compatible bacteriume0pathogen
- Outcome
- Resistancee0
- Direction
- could not be inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance in cvs Early Onward and Hurst Green Shaft to the compatible bacterium could not be induced by preliminary inoculation with live cells of an incompatible race”
t0“Susceptibility in Pea to Races”
Claim · model-written summary
Heat-killed cells of the races failed to induce the hypersensitive reaction in cultivars that normally show it when challenged with live avirulent bacteria.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- Heat-killed cells of the racese0
- Outcome
- hypersensitive reactione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat-killed cells of the races failed to induce the hypersensitive reaction in cultivars that normally show this response when challenged with live avirulent bacteria”
t0“Susceptibility in Pea to Races”
Claim · model-written summary
Preliminary inoculation with live race 1 cells failed to induce susceptibility in cv. Early Onward to live race 2 cells, irrespective of the challenge inoculation interval.
- Taxon
- PeaLathyrus oleraceust0
- Material
- cv. Early Onwarde0
- Treatment
- Preliminary inoculation with live race 1 cellse0
- Interactor
- race 2 cellse0pathogen
- Second interactor
- race 1 cellse0pathogen
- Outcome
- susceptibilitye0
- Direction
- failed to inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary inoculation with live race 1 cells failed to induce susceptibility in cv. Early Onward to live race 2 cells, irrespective of the challenge inoculation interval”
t0“Susceptibility in Pea to Races”
Claim · model-written summary
On cv. Hurst Green Shaft, preliminary inoculation with live race 2 cells induced limited susceptibility to live race 1 cells.
- Taxon
- PeaLathyrus oleraceust0
- Material
- cv. Hurst Green Shafte0
- Treatment
- preliminary inoculation with live race 2 cellse0
- Interactor
- race 1 cellse0pathogen
- Second interactor
- race 2 cellse0pathogen
- Outcome
- susceptibilitye0
- Direction
- inducede0
- Qualifier
- limitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On cv. Hurst Green Shaft, however, preliminary inoculation with live race 2 cells induced limited susceptibility to live race 1 cells”
t0“Susceptibility in Pea to Races”
Claim · model-written summary
Preliminary treatment with sterile distilled water followed 24 h later by challenge with a compatible race induced a moderate resistance response in both cultivars.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- Preliminary treatment with sterile distilled watere0
- Outcome
- resistance responsee0
- Direction
- inducede0
- Qualifier
- moderatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary treatment with sterile distilled water followed by challenge of the same leaves 24 h later with a compatible race induced a moderate resistance response in both cultivars”
t0“Susceptibility in Pea to Races”
The same questions in other papers
heat · disease · Lathyrus oleraceus (pea)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
3 papers more in this group
See all 7 papers →inoculation · disease · Lathyrus oleraceus (pea)Positive and negative results
17 papers in the same direction as this paper · 24 in the opposite direction
- negative
- negative
- negative
38 papers more in this group
See all 42 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.