Abstract
The structure of a metabolite, C10H10O5 (I), obtained as a weakly toxic substance from the culture filtrate of Alternaria kikuchiana, was determined as 3,6,8-trihydroxy-3-methyl-3,4- dihydroisocoumarin (Ia). Though three tautomeric forms—lactol form (Ia), keto form (Ib) and enol form (Ic) were possible for (I), it was found that the compound (I) existed as the lactol form (Ia) both in a crystalline state and in acetone, chloroform and methanol solutions. This metabolite gave weak necrotic symptom to pear leaves, but stimulated the root elongation of rice and radish seedlings (ca. 20~30%) at 5 ppm and also showed synergistic activity with gibberellin A3 on the stem elongation of rice seedlings (ca. 30%).
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Claims 4
Claim · model-written summary
The metabolite gave a weak necrotic symptom on pear leaves.
- Taxon
- pear
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communise0 - Organ / stage
- leavese0
- Treatment
- This metabolitee0
- Interactor
- Alternaria kikuchianaAlternaria kikuchianat0pathogen
- Outcome
- necrotic symptome0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“This metabolite gave weak necrotic symptom to pear leaves”
t0“Alternaria kikuchiana”
Claim · model-written summary
The Alternaria kikuchiana metabolite at 5 ppm stimulated root elongation of rice seedlings by about 20~30%.
- Taxon
- rice
Oryza sativae1 - Organ / stage
- seedlingse1
- Treatment
- This metabolitee0
- Interactor
- Alternaria kikuchianaAlternaria kikuchianat0pathogen
- Outcome
- root elongatione1
- Direction
- stimulatede1
- Value
- ca. 20~30%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This metabolite”
e1“stimulated the root elongation of rice and radish seedlings (ca. 20~30%) at 5 ppm”
t0“Alternaria kikuchiana”
Claim · model-written summary
The Alternaria kikuchiana metabolite at 5 ppm stimulated root elongation of radish seedlings by about 20~30%.
- Taxon
- radish
Raphanus sativuse1 - Organ / stage
- seedlingse1
- Treatment
- This metabolitee0
- Interactor
- Alternaria kikuchianaAlternaria kikuchianat0pathogen
- Outcome
- root elongatione1
- Direction
- stimulatede1
- Value
- ca. 20~30%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This metabolite”
e1“stimulated the root elongation of rice and radish seedlings (ca. 20~30%) at 5 ppm”
t0“Alternaria kikuchiana”
Claim · model-written summary
The metabolite acted synergistically with gibberellin A3 on stem elongation of rice seedlings (ca. 30%).
- Taxon
- riceOryza sativae0
- Organ / stage
- seedlingse0
- Treatment
- gibberellin A3e0
- Outcome
- stem elongatione0
- Direction
- synergistice0
- Value
- ca. 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“also showed synergistic activity with gibberellin A3 on the stem elongation of rice seedlings (ca. 30%)”
The same questions in other papers
metabolite · Alternaria kikuchiana · Pyrus communis (pear)Results agree
1 paper in the same direction as this paper
- negative
gibberellin A3 · growth · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.