Abstract
Tomato (Lycopersicon esculentum, Mill.) roots were analyzed during growth on agar plates. Growth of these roots was inhibited by the auxin transport inhibitors naphthylphthalamic acid (NPA) and semicarbazone derivative I (SCB-1). The effect of auxin transport inhibitors on root gravitropism was analyzed by measurement of the angle of gravitropic curvature after the roots were reoriented 90 degrees from the vertical. NPA and SCB-1 abolished both the response of these roots to gravity and the formation of lateral roots, with SCB-1 being the more effective at inhibition. Auxins also inhibited root growth. Both auxins tested has a slight effect on the gravity response, but this effect is probably indirect, since auxins reduced the growth rate. Auxins also stimulated lateral root growth at concentration where primary root growth was inhibited. When roots were treated with both IAA and NPA simultaneously, a cumulative inhibition of root growth was found. When both compounds were applied together, analysis of gravitropism and lateral root formation indicated that the dominant effect was exerted by auxin transport inhibitors. Together, these data suggest a model for the role of auxin transport in controlling both primary and lateral root growth.
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Claims 10
Claim · model-written summary
NPA and SCB-1 inhibited root growth.
- Taxon
- Tomato
Solanum lycopersicume1 - Treatment
- naphthylphthalamic acid (NPA) and semicarbazone derivative I (SCB-1)e0
- Outcome
- Growth of these rootse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of these roots was inhibited by the auxin transport inhibitors naphthylphthalamic acid (NPA) and semicarbazone derivative I (SCB-1).”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
NPA and SCB-1 abolished root gravitropism.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- NPA and SCB-1e0
- Outcome
- response of these roots to gravitye0
- Direction
- abolishede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPA and SCB-1 abolished both the response of these roots to gravity and the formation of lateral roots”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
NPA and SCB-1 abolished lateral root formation.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- NPA and SCB-1e0
- Outcome
- formation of lateral rootse0
- Direction
- abolishede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPA and SCB-1 abolished both the response of these roots to gravity and the formation of lateral roots”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
SCB-1 was more effective at inhibition.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- SCB-1e0
- Outcome
- inhibitione0
- Direction
- more effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with SCB-1 being the more effective at inhibition”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
Auxins inhibited root growth.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- Auxinse0
- Outcome
- root growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Auxins also inhibited root growth.”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
Auxins had a slight effect on gravity response.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- auxinse0
- Outcome
- gravity responsee0
- Qualifier
- slight effecte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both auxins tested has a slight effect on the gravity response”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
Auxins reduced root growth rate.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- auxinse0
- Outcome
- growth ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“auxins reduced the growth rate”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
Auxins stimulated lateral root growth at concentrations inhibiting primary root growth.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- Auxinse0
- Outcome
- lateral root growthe0
- Direction
- stimulatede0
- Qualifier
- at concentration where primary root growth was inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Auxins also stimulated lateral root growth at concentration where primary root growth was inhibited.”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
IAA and NPA together cumulatively inhibited root growth.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- both IAA and NPA simultaneouslye0
- Outcome
- root growthe0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When roots were treated with both IAA and NPA simultaneously, a cumulative inhibition of root growth was found.”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
Claim · model-written summary
With both compounds, transport inhibitors dominated the gravitropism response.
- Taxon
- TomatoSolanum lycopersicume1
- Treatment
- both compoundse0
- Outcome
- gravitropism and lateral root formatione0
- Qualifier
- dominant effect was exerted by auxin transport inhibitorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When both compounds were applied together, analysis of gravitropism and lateral root formation indicated that the dominant effect was exerted by auxin transport inhibitors.”
e1“Tomato (Lycopersicon esculentum, Mill.) roots”
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See all 53 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.