Abstract
Abstract The spore‐germination fluid of Alternaria solani was examined for factors which are important in the early stages of infection and probably explain the selectivity of A. solani to tomato and potato as host plants. The following activities of the spore‐germination fluid were found: 1. Host‐selective toxicity at low concentrations. 2. Infection promotion and enhancement of A. solani infections on host plants when spore‐germination fluid was added to the inoculum. 3. An induction of susceptibility which enabled a non‐pathogenic A. alternata isolate to cause necrotic spots on the leaves of the host plants of A. solani when its inoculum contained spore‐germination fluid of A. solani. Properties 1 and 2 seemed to, be attributed to alternaric acid. This phytotoxin was detectable in effective concentrations in the spore‐germination fluid. A factor, responsible for the susceptibility‐induction for A. alternata on the host plants of A. solani was characterized as a water‐soluble fraction of the spore‐germination fluid which was free of alternaric acid and not toxic.
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Claims 6
Claim · model-written summary
Alternaria solani spore fluid had host-selective toxicity at low concentration.
- Taxon
- tomato and potato
Solanum lycopersicum
Solanum tuberosume0e1 - Outcome
- Host‐selective toxicitye0
- Qualifier
- low concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Host‐selective toxicity at low concentrations”
t0“Alternaria solani Infections”
e1“selectivity of A. solani to tomato and potato as host plants”
Claim · model-written summary
Adding spore fluid to inoculum promoted Alternaria solani infections on hosts.
- Taxon
- tomato and potatoSolanum lycopersicumSolanum tuberosume0e1
- Treatment
- spore‐germination fluid was added to the inoculume0
- Interactor
- A. solani
Alternaria solanie0pathogen - Outcome
- A. solani infections on host plantse0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Infection promotion and enhancement of A. solani infections on host plants when spore‐germination fluid was added to the inoculum”
e1“selectivity of A. solani to tomato and potato as host plants”
Claim · model-written summary
Spore fluid enabled a nonpathogenic A. alternata isolate to cause host leaf necrosis.
- Taxon
- tomato and potatoSolanum lycopersicumSolanum tuberosume0e1
- Treatment
- spore‐germination fluid of A. solanie0
- Interactor
- A. alternata
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Alternaria alternatae0pathogen - Second interactor
- A. solaniAlternaria solanie0pathogen
- Outcome
- necrotic spots on the leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“enabled a non‐pathogenic A. alternata isolate to cause necrotic spots on the leaves of the host plants of A. solani when its inoculum contained spore‐germination fluid of A. solani”
e1“selectivity of A. solani to tomato and potato as host plants”
Claim · model-written summary
Alternaric acid appeared to account for host selective toxicity and infection promotion.
- Taxon
- tomato and potatoSolanum lycopersicumSolanum tuberosume0e1
- Compound
- alternaric acide0
- Outcome
- Properties 1 and 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Properties 1 and 2 seemed to, be attributed to alternaric acid”
e1“selectivity of A. solani to tomato and potato as host plants”
Claim · model-written summary
Alternaric acid was detectable at effective concentrations in the spore fluid.
- Taxon
- tomato and potatoSolanum lycopersicumSolanum tuberosume0e1
- Outcome
- This phytotoxin was detectable in effective concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This phytotoxin was detectable in effective concentrations in the spore‐germination fluid”
t0“Alternaric Acid”
e1“selectivity of A. solani to tomato and potato as host plants”
Claim · model-written summary
The A. alternata susceptibility factor was a water soluble, non-toxic fluid fraction without alternaric acid.
- Taxon
- tomato and potatoSolanum lycopersicumSolanum tuberosume0e1
- Interactor
- A. alternataAlternaria alternatae0pathogen
- Outcome
- water‐soluble fraction of the spore‐germination fluid which was free of alternaric acid and not toxice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A factor, responsible for the susceptibility‐induction for A. alternata on the host plants of A. solani was characterized as a water‐soluble fraction of the spore‐germination fluid which was free of alternaric acid and not toxic”
e1“selectivity of A. solani to tomato and potato as host plants”
The same questions in other papers
inoculation · Alternaria solani · Solanum tuberosum (potato)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
inoculation · Alternaria solani · Solanum lycopersicum (tomato)Positive and negative results
4 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 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.