Abstract
Abstract The phenomena of induced resistance and induced susceptibility were investigated in the pea‐ Pseudomonas syringae pv. pisi system, using two pea cultivgars, 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
Heat-killed bacteria induced pea resistance to P. s. pv. pisi infection.
- Taxon
- peas
Lathyrus oleraceuse0 - Treatment
- heat‐killed bacteriae0
- Interactor
- P. s. pv. pisie0pathogen
- Outcome
- resistance in peas to infectione0
- Direction
- inducede0
Not reportedComparator
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
Induced resistance depended on the time between preliminary and challenge inoculations.
- Taxon
- PeaLathyrus oleraceust0
- 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
t0“Pea”
e0“the resistance induced was dependent on the time interval between the preliminary and challenge inoculations”
Claim · model-written summary
The induced resistance mechanism appeared to vary between pea cultivars.
- Taxon
- PeaLathyrus oleraceust0
- Material
- cultivarse0
- Outcome
- mechanism of induced resistancee0
- Direction
- varye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea”
e0“The mechanism of induced resistance appears to vary between the cultivars”
Claim · model-written summary
The two pathogen races appeared to differ in resistance-inducing efficiency.
- Taxon
- PeaLathyrus oleraceust0
- Interactor
- Pseudomonas syringae pv. pisi
Pseudomonas syringae pv. pisie1pathogen - Outcome
- resistance‐inducing efficienciese0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea”
e0“both races of the pathogen appear to have different resistance‐inducing efficiencies”
e1“Pseudomonas syringae pv. pisi”
Claim · model-written summary
Live incompatible race cells failed to induce resistance in Early Onward and Hurst Green Shaft to compatible bacteria.
- Taxon
- PeaLathyrus oleraceust0
- Material
- Early Onward and Hurst Green Shafte0
- Treatment
- preliminary inoculation with live cells of an incompatible racee0
- Interactor
- Pseudomonas syringae pv. pisiPseudomonas syringae pv. pisie1pathogen
- Outcome
- Resistance in cvs Early Onward and Hurst Green Shafte0
- Direction
- could not be inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea”
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”
e1“Pseudomonas syringae pv. pisi”
Claim · model-written summary
Heat-killed race cells failed to induce the hypersensitive reaction.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- Heat‐killed cells of the racese0
- Interactor
- Pseudomonas syringae pv. pisiPseudomonas syringae pv. pisie1pathogen
- Outcome
- hypersensitive reactione0
- Direction
- failed to inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea”
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”
e1“Pseudomonas syringae pv. pisi”
Claim · model-written summary
Live race 1 cells did not induce Early Onward susceptibility to race 2.
- Taxon
- PeaLathyrus oleraceust0
- Material
- Early Onwarde0
- Treatment
- live race 1 cellse0
- Interactor
- Pseudomonas syringae pv. pisiPseudomonas syringae pv. pisie1pathogen
- Outcome
- susceptibility in cv. Early Onwarde0
- Direction
- failed to inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea”
e0“Preliminary inoculation with live race 1 cells failed to induce susceptibility in cv. Early Onward to live race 2 cells”
e1“Pseudomonas syringae pv. pisi”
Claim · model-written summary
Live race 2 cells induced limited susceptibility in Hurst Green Shaft to race 1.
- Taxon
- PeaLathyrus oleraceust0
- Material
- Hurst Green Shafte1
- Treatment
- live race 2 cellse0
- Interactor
- Pseudomonas syringae pv. pisiPseudomonas syringae pv. pisie2pathogen
- Outcome
- limited susceptibilitye0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea”
e0“preliminary inoculation with live race 2 cells induced limited susceptibility to live race 1 cells”
e1“On cv. Hurst Green Shaft”
e2“Pseudomonas syringae pv. pisi”
Claim · model-written summary
Sterile water pretreatment induced moderate resistance in both cultivars after compatible race challenge.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- sterile distilled watere0
- Interactor
- Pseudomonas syringae pv. pisiPseudomonas syringae pv. pisie1pathogen
- Outcome
- moderate resistance responsee0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea”
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”
e1“Pseudomonas syringae pv. pisi”
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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.