Abstract
Vernolepin (5 to 50 micrograms per milliliter), a novel sesquiterpenoid dilactone obtained from Vernonia hymenolepis, inhibits extension growth (from 20 to 80 percent) of wheat coleoptile sections. Inhibited tissues appear normal and their respiration is unaffected. If the inhibited sections are washed and subsequently treated with indole-3-acetic acid, the tissues respond to the auxin, but the degree of elongation is determined by the length of prior treatment with vernolepin. Administered simultaneously, increasing concentrations of auxin will significantly reduce the inhibitory effect of vernolepin, but there is no evidence for a competitive interaction between the two substances.
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Claims 6
Claim · model-written summary
Vernolepin inhibited wheat coleoptile extension by 20 to 80 percent.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- coleoptile sectionse0
- Treatment
- Vernolepin (5 to 50 micrograms per milliliter)e0
- Outcome
- extension growthe0
- Direction
- inhibitse0
- Value
- 20 to 80 percente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vernolepin (5 to 50 micrograms per milliliter), a novel sesquiterpenoid dilactone obtained from Vernonia hymenolepis, inhibits extension growth (from 20 to 80 percent) of wheat coleoptile sections.”
Claim · model-written summary
Vernolepin-inhibited wheat tissues appeared normal.
- Outcome
- Inhibited tissues appear normale0
Not reportedTaxon
Verbatim
t0“Plant Growth Inhibitor”
e0“Inhibited tissues appear normal”
Claim · model-written summary
Respiration of vernolepin-inhibited wheat tissues was unaffected.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Vernolepin (5 to 50 micrograms per milliliter)e0
- Outcome
- respiratione1
- Direction
- unaffectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vernolepin (5 to 50 micrograms per milliliter), a novel sesquiterpenoid dilactone obtained from Vernonia hymenolepis, inhibits extension growth (from 20 to 80 percent) of wheat coleoptile sections.”
e1“their respiration is unaffected”
Claim · model-written summary
After washing and auxin treatment, inhibited wheat sections responded, with elongation depending on prior vernolepin duration.
- Treatment
- indole-3-acetic acide0
- Outcome
- respond to the auxine0
- Qualifier
- length of prior treatment with vernolepine0
Not reportedTaxonComparatorDirection
Verbatim
e0“If the inhibited sections are washed and subsequently treated with indole-3-acetic acid, the tissues respond to the auxin, but the degree of elongation is determined by the length of prior treatment with vernolepin.”
t0“Plant Growth Inhibitor”
Claim · model-written summary
Increasing simultaneous auxin concentrations significantly reduced vernolepin inhibition.
- Treatment
- increasing concentrations of auxine0
- Outcome
- inhibitory effect of vernolepine0
- Direction
- reducee0
Not reportedTaxonComparator
Verbatim
e0“Administered simultaneously, increasing concentrations of auxin will significantly reduce the inhibitory effect of vernolepin”
Claim · model-written summary
There was no evidence of competitive interaction between auxin and vernolepin.
- Outcome
- no evidence for a competitive interactione0
Not reportedTaxon
Verbatim
e0“there is no evidence for a competitive interaction between the two substances”
The same questions in other papers
indole-3-acetic acid · physiology: hormones · Triticum aestivum (wheat)Positive and negative results
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- no effect
- positive
- positive
class · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results
14 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
14 papers more in this group
See all 18 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.