Abstract
Inoculation of first expanded leaves of pea seedlings with an avirulent strain of Pseudomonas syringae pv. pisi , or treatment with sprays of a benzothiadiazole (20 or 100 μ g a.i. mL −1 ), decreased the susceptibility of subsequent leaves 7 or 14 days later to challenge inoculation with Mycosphaerella pinodes . Inoculation of first leaves with a virulent strain of P. syringae pv. pisi or with M. pinodes did not decrease the susceptibility of plants to M. pinodes . Treatments effective in decreasing susceptibility to M. pinodes were similarly active against Uromyces viciae‐fabae and virulent P. syringae pv. pisi . Effective treatments also enhanced the activities of the enzymes β‐1,3‐glucanase and chitinase in untreated upper leaves 6 days later. Ineffective treatments for decreased susceptibility had no effect on the activity of the enzymes. None of the treatments enhanced peroxidase activities. The results are discussed in relation to the reported signalling effects of the benzothiadiazole and in relation to a suggested high activity of the avirulent P. syringae pv. pisi strain and inactivity of M. pinodes in enhancing natural signalling.
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Claims 7
Claim · model-written summary
An avirulent Pseudomonas syringae pv. pisi strain applied to first leaves decreased susceptibility of later pea leaves to Mycosphaerella pinodes.
- Taxon
- pea
Lathyrus oleraceust0 - Treatment
- avirulent strain of Pseudomonas syringae pv. pisie1
- Interactor
- Mycosphaerella pinodes
Didymella pinodese2pathogen - Second interactor
- Pseudomonas syringae pv. pisi
Pseudomonas syringae pv. pisie1other - Outcome
- susceptibility of subsequent leavese2
- Direction
- decreasede2
- Qualifier
- 7 or 14 days latere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Inoculation of first expanded leaves of pea seedlings with an avirulent strain of Pseudomonas syringae pv. pisi”
e2“decreased the susceptibility of subsequent leaves 7 or 14 days later to challenge inoculation with Mycosphaerella pinodes”
t0“systemic disease resistance in pea”
Claim · model-written summary
Sprays of a benzothiadiazole decreased susceptibility of later pea leaves to Mycosphaerella pinodes.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- sprays of a benzothiadiazolee3
- Interactor
- Mycosphaerella pinodesDidymella pinodese2pathogen
- Outcome
- susceptibility of subsequent leavese2
- Direction
- decreasede2
- Qualifier
- 7 or 14 days latere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“treatment with sprays of a benzothiadiazole”
e2“decreased the susceptibility of subsequent leaves 7 or 14 days later to challenge inoculation with Mycosphaerella pinodes”
t0“systemic disease resistance in pea”
Claim · model-written summary
Inoculation of first leaves with a virulent P. syringae pv. pisi strain or with M. pinodes did not decrease susceptibility of pea plants to M. pinodes.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- virulent strain of P. syringae pv. pisie4
- Interactor
- M. pinodesDidymella pinodese4pathogen
- Outcome
- susceptibility of plants to M. pinodese4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Inoculation of first leaves with a virulent strain of P. syringae pv. pisi or with M. pinodes did not decrease the susceptibility of plants to M. pinodes”
t0“systemic disease resistance in pea”
Claim · model-written summary
Treatments effective against M. pinodes were similarly active against Uromyces viciae‐fabae and virulent P. syringae pv. pisi.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- Treatments effective in decreasing susceptibility to M. pinodese5
- Interactor
- Uromyces viciae‐fabaee5pathogen
- Second interactor
- P. syringae pv. pisiPseudomonas syringae pv. pisie5pathogen
- Outcome
- similarly active againste5
- Direction
- decreaseinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Treatments effective in decreasing susceptibility to M. pinodes were similarly active against Uromyces viciae‐fabae and virulent P. syringae pv. pisi”
t0“systemic disease resistance in pea”
Claim · model-written summary
Effective treatments enhanced activities of β‑1,3‑glucanase and chitinase in untreated upper leaves 6 days later.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- upper leavese7
- Treatment
- Effective treatmentse7
- Gene
- β‑1,3‑glucanase and chitinasee7
- Outcome
- activities of the enzymese7
- Direction
- enhancede7
- Comparator
- Ineffective treatmentse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Effective treatments also enhanced the activities of the enzymes β‑1,3‑glucanase and chitinase in untreated upper leaves 6 days later”
e6“Ineffective treatments for decreased susceptibility had no effect on the activity of the enzymes”
t0“systemic disease resistance in pea”
Claim · model-written summary
Ineffective treatments had no effect on enzyme activity.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- Ineffective treatmentse6
- Outcome
- the activity of the enzymese6
- Direction
- no_changeinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Ineffective treatments for decreased susceptibility had no effect on the activity of the enzymes”
t0“systemic disease resistance in pea”
Claim · model-written summary
None of the treatments enhanced peroxidase activities.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- None of the treatmentse6
- Outcome
- peroxidase activitiese6
- Direction
- no_changeinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“None of the treatments enhanced peroxidase activities”
t0“systemic disease resistance in pea”
The same questions in other papers
application · Didymella pinodes · Lathyrus oleraceus (pea)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.