Abstract
SUMMARY Two isolates of Rhizoctonia solani which differed in their pathogenicity toward lettuce and cauliflower seedlings were obtained. Each was highly pathogenic toward one host and almost non‐pathogenic to the other. Mineral nutrition of the host, illumination and temperature had little effect on pathogenicity, although very different types of plants were produced. A resistance that developed rapidly with age depended on adequate nutrition and active growth of the seedlings. The nutrition of the fungus, its vigour, and the quantity of inoculum were important in establishing infection, but did not affect the pathogenicity to resistant hosts. High relative humidity reduced the resistance of cauliflower seedlings to the lettuce isolate and also increased the pathogenicity of the lettuce isolate to this host. Pathogenicity depended mainly on intrinsic properties of the host and isolate, and environmental factors were rarely of more than secondary importance in determining whether or not an isolate would attack a particular host plant.
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Claims 5
Claim · model-written summary
Seedling phenotype differed greatly despite little pathogenicity effect.
- Taxon
- lettuce and cauliflower seedlings
Brassica oleracea var. botrytis
Lactuca sativat0 - Outcome
- very different types of plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“although very different types of plants were produced.”
t0“lettuce and cauliflower seedlings”
Claim · model-written summary
Age-related seedling resistance depended on adequate nutrition and active growth.
Verbatim
e0“A resistance that developed rapidly with age depended on adequate nutrition and active growth of the seedlings.”
Claim · model-written summary
High relative humidity lowered cauliflower resistance to the lettuce isolate.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Treatment
- High relative humiditye0
- Interactor
- lettuce isolatee0pathogen
- Outcome
- resistance of cauliflower seedlingse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High relative humidity reduced the resistance of cauliflower seedlings to the lettuce isolate”
Claim · model-written summary
High relative humidity increased lettuce isolate pathogenicity to cauliflower.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Treatment
- High relative humiditye0
- Interactor
- lettuce isolatee0pathogen
- Outcome
- pathogenicity of the lettuce isolatee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High relative humidity reduced the resistance of cauliflower seedlings to the lettuce isolate and also increased the pathogenicity of the lettuce isolate to this host.”
Claim · model-written summary
Environmental factors were generally secondary in determining host attack.
Verbatim
e0“environmental factors were rarely of more than secondary importance in determining whether or not an isolate would attack a particular host plant.”
The same questions in other papers
humidity · disease · Brassica oleracea (wild cabbage)Positive and negative results
1 in the opposite direction
- 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.