Abstract
A single spray of 100mM solutions of K2HPO4, KH2PO4, Na4P2O7 and Na3,PO4 on the upper surface of the first true leaf of cucumber plants 2h before inoculation with a conidial suspension of Sphaerotheca fuliginea, induced systemic protection to powdery mildew in leaves 2 and 3. Application of Na2HPO4 had little or no effect. A mixture of KH2PO4 and Na2HPO4 which was sprayed on leaf 1 however, markedly induced systemic resistance on leaves 2 and 3. Spraying K2HPO4 on leaf 1 at the same concentration at 96, 48 and 2h before inoculation induced 74,76 and 96%, respectively, of systemic protection in the number of powdery mildew pustules per plant as compared to plants sprayed with water. Consistently, inductions with K2HPO4 or KH2PO4 were the most effective for systemic protection. One spray of K2HPO4 on leaf 1, two or four days before inoculation also stimulated plant growth, regardless of inoculation. The possible dual use of phosphate salts as foliar fertilizers and as agents for induced resistance is considered.
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Claims 11
Claim · model-written summary
A single spray of 100mM K2HPO4 on the first true leaf of cucumber 2h before inoculation with Sphaerotheca fuliginea induced systemic protection against powdery mildew in leaves 2 and 3.
- Taxon
- cucumber
Cucumis sativuse1 - Organ / stage
- leaves 2 and 3e3
- Treatment
- K2HPO4e0
- Interactor
- Sphaerotheca fuliginea
Podosphaera fuligineae2pathogen - Outcome
- systemic protection to powdery mildewe3
- Direction
- inducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single spray of 100mM solutions of K2HPO4, KH2PO4, Na4P2O7 and Na3,PO4”
e1“cucumber plants”
e2“Sphaerotheca fuliginea”
e3“induced systemic protection to powdery mildew in leaves 2 and 3”
Claim · model-written summary
A single spray of 100mM KH2PO4 on the first true leaf of cucumber 2h before inoculation with Sphaerotheca fuliginea induced systemic protection against powdery mildew in leaves 2 and 3.
- Taxon
- cucumberCucumis sativuse1
- Organ / stage
- leaves 2 and 3e3
- Treatment
- KH2PO4e0
- Interactor
- Sphaerotheca fuligineaPodosphaera fuligineae2pathogen
- Outcome
- systemic protection to powdery mildewe3
- Direction
- inducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single spray of 100mM solutions of K2HPO4, KH2PO4, Na4P2O7 and Na3,PO4”
e1“cucumber plants”
e2“Sphaerotheca fuliginea”
e3“induced systemic protection to powdery mildew in leaves 2 and 3”
Claim · model-written summary
A single spray of 100mM Na4P2O7 on the first true leaf of cucumber 2h before inoculation with Sphaerotheca fuliginea induced systemic protection against powdery mildew in leaves 2 and 3.
- Taxon
- cucumberCucumis sativuse1
- Organ / stage
- leaves 2 and 3e3
- Treatment
- Na4P2O7e0
- Interactor
- Sphaerotheca fuligineaPodosphaera fuligineae2pathogen
- Outcome
- systemic protection to powdery mildewe3
- Direction
- inducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single spray of 100mM solutions of K2HPO4, KH2PO4, Na4P2O7 and Na3,PO4”
e1“cucumber plants”
e2“Sphaerotheca fuliginea”
e3“induced systemic protection to powdery mildew in leaves 2 and 3”
Claim · model-written summary
A single spray of 100mM Na3,PO4 on the first true leaf of cucumber 2h before inoculation with Sphaerotheca fuliginea induced systemic protection against powdery mildew in leaves 2 and 3.
- Taxon
- cucumberCucumis sativuse1
- Organ / stage
- leaves 2 and 3e3
- Treatment
- Na3,PO4e0
- Interactor
- Sphaerotheca fuligineaPodosphaera fuligineae2pathogen
- Outcome
- systemic protection to powdery mildewe3
- Direction
- inducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single spray of 100mM solutions of K2HPO4, KH2PO4, Na4P2O7 and Na3,PO4”
e1“cucumber plants”
e2“Sphaerotheca fuliginea”
e3“induced systemic protection to powdery mildew in leaves 2 and 3”
Claim · model-written summary
Application of Na2HPO4 had little or no effect on systemic protection against powdery mildew.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Na2HPO4e0
- Interactor
- Sphaerotheca fuligineaPodosphaera fuligineae2pathogen
- Outcome
- systemic protection to powdery mildewe3
- Direction
- little or no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Na2HPO4 had little or no effect”
e1“cucumber plants”
e2“Sphaerotheca fuliginea”
e3“induced systemic protection to powdery mildew in leaves 2 and 3”
Claim · model-written summary
A mixture of KH2PO4 and Na2HPO4 sprayed on leaf 1 markedly induced systemic resistance on leaves 2 and 3.
- Taxon
- cucumberCucumis sativuse1
- Organ / stage
- leaves 2 and 3e0
- Treatment
- mixture of KH2PO4 and Na2HPO4e0
- Outcome
- systemic resistancee0
- Direction
- markedly inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A mixture of KH2PO4 and Na2HPO4 which was sprayed on leaf 1 however, markedly induced systemic resistance on leaves 2 and 3”
e1“cucumber plants”
Claim · model-written summary
Spraying K2HPO4 on leaf 1 96h before inoculation induced 74% of systemic protection in the number of powdery mildew pustules per plant compared with water-sprayed plants.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Spraying K2HPO4e0
- Outcome
- systemic protection in the number of powdery mildew pustules per plante0
- Direction
- inducede0
- Value
- 74e0
- Qualifier
- 96e0
- Comparator
- plants sprayed with watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying K2HPO4 on leaf 1 at the same concentration at 96, 48 and 2h before inoculation induced 74,76 and 96%, respectively, of systemic protection in the number of powdery mildew pustules per plant as compared to plants sprayed with water”
e1“cucumber plants”
Claim · model-written summary
Spraying K2HPO4 on leaf 1 48h before inoculation induced 76% of systemic protection in the number of powdery mildew pustules per plant compared with water-sprayed plants.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Spraying K2HPO4e0
- Outcome
- systemic protection in the number of powdery mildew pustules per plante0
- Direction
- inducede0
- Value
- 76e0
- Qualifier
- 48e0
- Comparator
- plants sprayed with watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying K2HPO4 on leaf 1 at the same concentration at 96, 48 and 2h before inoculation induced 74,76 and 96%, respectively, of systemic protection in the number of powdery mildew pustules per plant as compared to plants sprayed with water”
e1“cucumber plants”
Claim · model-written summary
Spraying K2HPO4 on leaf 1 2h before inoculation induced 96% of systemic protection in the number of powdery mildew pustules per plant compared with water-sprayed plants.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Spraying K2HPO4e0
- Outcome
- systemic protection in the number of powdery mildew pustules per plante0
- Direction
- inducede0
- Value
- 96%e0
- Qualifier
- 2he0
- Comparator
- plants sprayed with watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying K2HPO4 on leaf 1 at the same concentration at 96, 48 and 2h before inoculation induced 74,76 and 96%, respectively, of systemic protection in the number of powdery mildew pustules per plant as compared to plants sprayed with water”
e1“cucumber plants”
Claim · model-written summary
Inductions with K2HPO4 or KH2PO4 were the most effective for systemic protection.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- inductions with K2HPO4 or KH2PO4e0
- Outcome
- systemic protectione0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Consistently, inductions with K2HPO4 or KH2PO4 were the most effective for systemic protection”
e1“cucumber plants”
Claim · model-written summary
One spray of K2HPO4 on leaf 1, two or four days before inoculation, also stimulated plant growth regardless of inoculation.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- One spray of K2HPO4 on leaf 1e0
- Outcome
- plant growthe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One spray of K2HPO4 on leaf 1, two or four days before inoculation also stimulated plant growth, regardless of inoculation”
e1“cucumber plants”
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