Abstract
Interveinal strips (10 x 1.5 mm) excised from growing tobacco (Nicotiana tabacum L. cv Xanthi) leaves curled >300[deg] when incubated for 20 h in 5 to 500 [mu]M [alpha]-naphthalene acetic acid or 50 to 500 [mu]M indole-3-acetic acid. Epinasty was not induced without auxin or by the auxin analog [beta]-naphthalene acetic acid, and less substantial epinasty was induced in midrib and vein segments. Auxin treatment increased the length of both surfaces of strips. Curvature resulted from greater growth on the adaxial side. Epinastic sensitivity of strips to auxin appeared first in the distal third of young leaves (blade 4.5-6.0 cm). In older leaves (8-10 and 12-14 cm), the interveinal tissues throughout were sensitive, whereas in leaves 16- to 18-cm long, sensitivity was reduced in the distal two-thirds. Amino-oxyacetic acid (AOA), an ethylene biosynthesis inhibitor, partially inhibited epinasty at 100 [mu]M. However, a poor correlation between inhibition of ethylene biosynthesis by AOA and its inhibition of curvature and the inability of ethylene to produce epinasty or to reverse the effects of AOA suggests that auxin-induced epinasty is not caused by auxin-induced ethylene production.
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Claims 15
Claim · model-written summary
Auxin incubation curled tobacco interveinal strips by more than 300 degrees.
- Taxon
- tobacco
Nicotiana tabacume0 - Material
- Nicotiana tabacum L. cv Xanthie0
- Organ / stage
- Interveinal stripse0
- Treatment
- 5 to 500 [mu]M [alpha]-naphthalene acetic acide0
- Outcome
- curlede0
- Direction
- curlede0
- Value
- >300[deg]e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interveinal strips (10 x 1.5 mm) excised from growing tobacco (Nicotiana tabacum L. cv Xanthi) leaves curled >300[deg] when incubated for 20 h in 5 to 500 [mu]M [alpha]-naphthalene acetic acid or 50 to 500 [mu]M indole-3-acetic acid.”
Claim · model-written summary
Indole-3-acetic acid also curled interveinal strips more than 300 degrees.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- 50 to 500 [mu]M indole-3-acetic acide0
- Outcome
- curlede0
- Direction
- curlede0
- Value
- >300[deg]e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interveinal strips (10 x 1.5 mm) excised from growing tobacco (Nicotiana tabacum L. cv Xanthi) leaves curled >300[deg] when incubated for 20 h in 5 to 500 [mu]M [alpha]-naphthalene acetic acid or 50 to 500 [mu]M indole-3-acetic acid.”
Claim · model-written summary
Without auxin, epinasty was not induced.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- without auxine0
- Outcome
- Epinasty was not inducede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Epinasty was not induced without auxin or by the auxin analog [beta]-naphthalene acetic acid”
t0“Tobacco”
Claim · model-written summary
The auxin analog beta-naphthalene acetic acid did not induce epinasty.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- [beta]-naphthalene acetic acide0
- Outcome
- Epinasty was not inducede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Epinasty was not induced without auxin or by the auxin analog [beta]-naphthalene acetic acid”
t0“Tobacco”
Claim · model-written summary
Midrib segments showed less substantial epinasty.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- midribe0
- Outcome
- less substantial epinastye0
- Direction
- less substantiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less substantial epinasty was induced in midrib and vein segments”
t0“Tobacco”
Claim · model-written summary
Vein segments showed less substantial epinasty.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- vein segmentse0
- Outcome
- less substantial epinastye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less substantial epinasty was induced in midrib and vein segments”
t0“Tobacco”
Claim · model-written summary
Auxin increased length on both strip surfaces.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- Auxin treatmente0
- Outcome
- length of both surfaces of stripse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Auxin treatment increased the length of both surfaces of strips.”
t0“Tobacco”
Claim · model-written summary
Greater adaxial growth produced strip curvature.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- adaxial sidee0
- Outcome
- Curvaturee0
- Qualifier
- greater growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Curvature resulted from greater growth on the adaxial side.”
t0“Tobacco”
Claim · model-written summary
Auxin sensitivity appeared first in distal young leaf tissue.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- distal third of young leavese0
- Outcome
- Epinastic sensitivitye0
- Value
- 4.5-6.0 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Epinastic sensitivity of strips to auxin appeared first in the distal third of young leaves (blade 4.5-6.0 cm).”
t0“Tobacco”
Claim · model-written summary
All interveinal tissues of older leaves were auxin sensitive.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- interveinal tissuese0
- Outcome
- sensitivee0
- Qualifier
- older leaves (8-10 and 12-14 cm)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In older leaves (8-10 and 12-14 cm), the interveinal tissues throughout were sensitive”
t0“Tobacco”
Claim · model-written summary
Sensitivity was reduced in distal tissue of 16- to 18-cm leaves.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- distal two-thirdse0
- Outcome
- sensitivitye0
- Direction
- reducede0
- Qualifier
- leaves 16- to 18-cm longe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in leaves 16- to 18-cm long, sensitivity was reduced in the distal two-thirds”
t0“Tobacco”
Claim · model-written summary
AOA partially inhibited epinasty at 100 micromolar.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- Amino-oxyacetic acide0
- Outcome
- epinastye0
- Direction
- partially inhibitede0
- Value
- 100 [mu]Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amino-oxyacetic acid (AOA), an ethylene biosynthesis inhibitor, partially inhibited epinasty at 100 [mu]M.”
t0“Tobacco”
Claim · model-written summary
AOA inhibition of ethylene biosynthesis correlated poorly with its inhibition of curvature.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- AOAe0
- Outcome
- inhibition of curvaturee0
- Qualifier
- poor correlatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a poor correlation between inhibition of ethylene biosynthesis by AOA and its inhibition of curvature”
t0“Tobacco”
Claim · model-written summary
Ethylene could not produce epinasty or reverse AOA effects.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- ethylenee0
- Outcome
- inability of ethylene to produce epinasty or to reverse the effects of AOAe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inability of ethylene to produce epinasty or to reverse the effects of AOA”
t0“Tobacco”
Claim · model-written summary
Authors infer that auxin-induced epinasty is not caused by induced ethylene production.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- auxin-induced epinastye0
- Qualifier
- not caused by auxin-induced ethylene productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“auxin-induced epinasty is not caused by auxin-induced ethylene production”
t0“Tobacco”
The same questions in other papers
ethene · physiology: hormones · Nicotiana tabacum (tobacco)Results differ
3 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
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See all 8 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.