Abstract
SUMMARY Filtrate extracts from liquid cultures of B. fabae and extracts from spreading chocolate spot lesions contained at least two heat‐stable, light‐labile phytotoxic compounds. Lesions similar in appearance to those of chocolate spot developed after injection of fractions containing these compounds into healthy bean leaves. Of 15 plant species injected with an extract from lesions, Vicia faba appeared to be the most susceptible to damage. Evidence is presented to support the hypothesis that under conditions of low humidity the concentrations of toxic compounds in an infected leaf become high enough to kill healthy cells surrounding infected tissue. The dead tissue then dries out preventing further fungal growth and lesion spread. In saturated air, however, the toxic compounds diffuse throughout the lamina and become too dilute to kill uninfected tissue. Tissue does not become desiccated and the fungus continues to spread.
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Claims 5
Claim · model-written summary
Culture filtrates and lesions contained at least two phytotoxic compounds.
- Taxon
- field beant0
- Interactor
- B. fabae
Botrytis fabaee0pathogen - Outcome
- at least two heat‐stable, light‐labile phytotoxic compoundse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Filtrate extracts from liquid cultures of B. fabae and extracts from spreading chocolate spot lesions contained at least two heat‐stable, light‐labile phytotoxic compounds.”
t0“field bean leaves”
Claim · model-written summary
Injecting toxin fractions produced chocolate spot like lesions in healthy bean leaves.
- Taxon
- beane0
- Treatment
- injection of fractions containing these compoundse0
- Outcome
- Lesions similar in appearance to those of chocolate spote0
Not reportedComparatorDirection
Verbatim
e0“Lesions similar in appearance to those of chocolate spot developed after injection of fractions containing these compounds into healthy bean leaves.”
t0“field bean leaves”
Claim · model-written summary
Vicia faba was the most susceptible of 15 injected species.
- Taxon
- Vicia faba
Vicia fabae0 - Treatment
- extract from lesionse0
- Outcome
- susceptible to damagee0
- Direction
- most susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of 15 plant species injected with an extract from lesions, Vicia faba appeared to be the most susceptible to damage.”
Claim · model-written summary
At low humidity, toxin concentrations can kill adjacent healthy cells, and desiccation prevents fungal spread.
Verbatim
e0“under conditions of low humidity the concentrations of toxic compounds in an infected leaf become high enough to kill healthy cells surrounding infected tissue. The dead tissue then dries out preventing further fungal growth and lesion spread.”
t0“field bean leaves”
Claim · model-written summary
In saturated air, toxin dilution prevents death and desiccation, allowing fungal spread.
Verbatim
e0“In saturated air, however, the toxic compounds diffuse throughout the lamina and become too dilute to kill uninfected tissue. Tissue does not become desiccated and the fungus continues to spread.”
t0“field bean leaves”
The same questions in other papers
application · disease · Phaseolus vulgaris (common bean)Positive and negative results
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See all 35 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.