Abstract
We have re-examined the role of ethylene during rooting of mung bean cuttings. Cuttings were treated for 5 days with a low or a high concentration of NAA (naphthaleneacetic acid). During this 5 days period, we also applied STS (silverthiosulfate, an inhibitor of ethylene action) or ACC (1-aminocyclo-propane-l-carboxylic acid, a direct precursor of ethylene). At high NAA concentration, STS promoted and ACC inhibited rooting, respectively. At low NAA concentration, the effects were opposite, STS being inhibitory and ACC promotive. AVG (aminoethoxyvinylglycine, an inhibitor of ethylene synthesis) gave similar results as STS. Together, these data suggest supraoptimal and suboptimal ethylene levels in the tissue at high and low NAA concentration, respectively. We also examined whether the effect of ethylene varied during the successive phases of the rooting process. Thus, we gave 24 h pulses with either STS or ACC during the rooting treatment. During the first two days (0–48 h), ACC-pulses were promotive and STS-pulses inhibitory. Later on (48–168 h), the ACC-pulses were inhibitory and the STS-pulses promotive. Whether this effect was observed or not was dependent on the NAA concentration. These data indicate that ethylene promotes or inhibits rooting depending on the stage in the rooting process. When ACC was added only during the initial period, rooting was increased at all NAA concentrations in a NAA dose-response curve and the optimal NAA concentration remained the same. This suggests that ethylene renders more cells responsive to NAA.
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Claims 12
Claim · model-written summary
STS promoted rooting at high NAA concentration.
- Taxon
- mung bean
.jpg?width=60)
Vigna radiatat0 - Treatment
- STSe1
- Outcome
- rootinge1
- Direction
- promotede1
- Qualifier
- high NAA concentratione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“mung bean cuttings”
e1“At high NAA concentration, STS promoted and ACC inhibited rooting, respectively”
Claim · model-written summary
ACC inhibited rooting at high NAA concentration.
- Taxon
- mung beanVigna radiatat0
- Treatment
- ACCe1
- Outcome
- rootinge1
- Direction
- inhibitede1
- Qualifier
- high NAA concentratione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e1“At high NAA concentration, STS promoted and ACC inhibited rooting, respectively”
Claim · model-written summary
STS was inhibitory to rooting at low NAA concentration.
- Taxon
- mung beanVigna radiatat0
- Treatment
- STSe2
- Outcome
- rootinge2
- Direction
- inhibitorye2
- Qualifier
- low NAA concentratione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e2“At high NAA concentration, STS promoted and ACC inhibited rooting, respectively. At low NAA concentration, the effects were opposite, STS being inhibitory and ACC promotive”
Claim · model-written summary
ACC promoted rooting at low NAA concentration.
- Taxon
- mung beanVigna radiatat0
- Treatment
- ACCe2
- Outcome
- rootinge2
- Direction
- promotivee2
- Qualifier
- low NAA concentratione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e2“At high NAA concentration, STS promoted and ACC inhibited rooting, respectively. At low NAA concentration, the effects were opposite, STS being inhibitory and ACC promotive”
Claim · model-written summary
AVG gave rooting results similar to STS.
- Taxon
- mung beanVigna radiatat0
- Treatment
- AVGe5
- Outcome
- rootinge5
- Direction
- similar resultse5
- Comparator
- STSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e5“At high NAA concentration, STS promoted and ACC inhibited rooting, respectively. At low NAA concentration, the effects were opposite, STS being inhibitory and ACC promotive. AVG (aminoethoxyvinylglycine, an inhibitor of ethylene synthesis) gave similar results as STS”
Claim · model-written summary
ACC pulses in the first two days promoted rooting.
- Taxon
- mung beanVigna radiatat0
- Treatment
- ACC-pulsese6
- Outcome
- rootinge6
- Direction
- promotivee6
- Qualifier
- during the first two days (0–48 h)e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e6“Thus, we gave 24 h pulses with either STS or ACC during the rooting treatment. During the first two days (0–48 h), ACC-pulses were promotive and STS-pulses inhibitory”
Claim · model-written summary
STS pulses in the first two days inhibited rooting.
- Taxon
- mung beanVigna radiatat0
- Treatment
- STS-pulsese6
- Outcome
- rootinge6
- Direction
- inhibitorye6
- Qualifier
- during the first two days (0–48 h)e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e6“Thus, we gave 24 h pulses with either STS or ACC during the rooting treatment. During the first two days (0–48 h), ACC-pulses were promotive and STS-pulses inhibitory”
Claim · model-written summary
ACC pulses after 48 h inhibited rooting.
- Taxon
- mung beanVigna radiatat0
- Treatment
- ACC-pulsese7
- Outcome
- rootinge6
- Direction
- inhibitorye7
- Qualifier
- Later on (48–168 h)e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e6“Thus, we gave 24 h pulses with either STS or ACC during the rooting treatment”
e7“Later on (48–168 h), the ACC-pulses were inhibitory and the STS-pulses promotive”
Claim · model-written summary
STS pulses after 48 h promoted rooting.
- Taxon
- mung beanVigna radiatat0
- Treatment
- STS-pulsese7
- Outcome
- rootinge6
- Direction
- promotivee7
- Qualifier
- Later on (48–168 h)e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e6“Thus, we gave 24 h pulses with either STS or ACC during the rooting treatment”
e7“Later on (48–168 h), the ACC-pulses were inhibitory and the STS-pulses promotive”
Claim · model-written summary
ACC added only in the initial period increased rooting at all NAA concentrations.
- Taxon
- mung beanVigna radiatat0
- Treatment
- ACCe1
- Outcome
- rootinge1
- Direction
- increasede1
- Qualifier
- the optimal NAA concentration remained the samee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e1“When ACC was added only during the initial period, rooting was increased at all NAA concentrations in a NAA dose-response curve and the optimal NAA concentration remained the same”
Claim · model-written summary
Ethylene renders more cells responsive to NAA.
- Taxon
- mung beanVigna radiatat0
- Compound
- ethylenee1
- Outcome
- more cells responsive to NAAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e1“This suggests that ethylene renders more cells responsive to NAA”
Claim · model-written summary
Ethylene promotes or inhibits rooting depending on the stage in the rooting process.
- Taxon
- mung beanVigna radiatat0
- Compound
- ethylenee1
- Outcome
- rootinge1
- Qualifier
- depending on the stage in the rooting processe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mung bean cuttings”
e1“These data indicate that ethylene promotes or inhibits rooting depending on the stage in the rooting process”
The same questions in other papers
1-aminocyclopropanecarboxylic acid · growth · Vigna radiata (mung bean)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- 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.