Abstract
Sunflower plants were inoculated with a virulent isolate of Sclerotinia sclerotiorum and with the same isolate nutritionally conditioned to produce small amounts of oxalic acid. The preconditioned isolate behaved as hypovirulent. Tomato plants were inoculated with four S. sclerotiorum isolates of increasing virulence. A close correlation among disease severity, accumulation of oxalic acid, decrease in pH and inhibition of polyphenoloxidase in both infected host tissues was demonstrated. Oxalic acid production as an important factor of virulence in S. sclerotiorum is emphasized and its effect on the phenolic metabolism of the host via inhibition of polyphenoloxidase is suggested.
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Claims 5
Claim · model-written summary
The nutritionally preconditioned Sclerotinia isolate was hypovirulent on sunflower.
- Taxon
- Sunflower
Helianthus annuuse0 - Treatment
- nutritionally conditionede0
- Interactor
- Sclerotinia sclerotiorum
Sclerotinia sclerotiorume0pathogen - Outcome
- hypovirulente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunflower plants were inoculated with a virulent isolate of Sclerotinia sclerotiorum and with the same isolate nutritionally conditioned to produce small amounts of oxalic acid. The preconditioned isolate behaved as hypovirulent.”
Claim · model-written summary
In infected sunflower and tomato tissue, disease severity correlated closely with oxalic acid accumulation.
- Interactor
- S. sclerotiorumSclerotinia sclerotiorume0pathogen
- Compound
- oxalic acide0
- Outcome
- disease severitye0
Not reportedTaxonDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato plants were inoculated with four S. sclerotiorum isolates of increasing virulence. A close correlation among disease severity, accumulation of oxalic acid, decrease in pH and inhibition of polyphenoloxidase in both infected host tissues was demonstrated.”
Claim · model-written summary
In infected host tissue, disease severity correlated closely with a decrease in pH.
Not reportedTaxonInteractor
Verbatim
e0“A close correlation among disease severity, accumulation of oxalic acid, decrease in pH and inhibition of polyphenoloxidase in both infected host tissues was demonstrated.”
Claim · model-written summary
In infected host tissue, disease severity correlated closely with inhibited polyphenoloxidase.
Not reportedTaxon
Verbatim
e0“A close correlation among disease severity, accumulation of oxalic acid, decrease in pH and inhibition of polyphenoloxidase in both infected host tissues was demonstrated.”
Claim · model-written summary
The authors suggest oxalic acid affects host phenolic metabolism through inhibition of polyphenoloxidase.
Not reportedTaxon
Verbatim
e0“its effect on the phenolic metabolism of the host via inhibition of polyphenoloxidase is suggested.”