Abstract
α‐1,4‐Oligogalacturonides with degrees of polymerization (DPs) ranging from 6 to 18 or 2 to 8 were added to tobacco leaf explants and root formation was evaluated after 15 days of incubation. Auxin‐induced formation of roots was inhibited by oligogalacturonides with DPs 6–18 but not by the oligogalacturonides with DPs 2–8. The inhibition of root formation by the larger oligogalacturonides was prevented by increasing the amount of auxin present in the medium. Oligogalacturonides (DPs 6–18) also inhibited root formation when added to tobacco thin cell‐layer (TCL) explants in a medium that is known to induce the formation of roots. The addition of size‐homogeneous oligogalacturonides, to either tobacco leaf explants or TCLs, established that oligogalacturonides with DPs between 10 and 14 were most active in inhibiting the formation of roots. These data suggest that oligogalacturonides of the same size as those known to elicit plant defense responses, and to affect floral development and membrane functions, also inhibit the induction of root morphogenesis in tobacco.
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Claims 5
Claim · model-written summary
DP 6–18 oligogalacturonides inhibited auxin-induced root formation.
- Taxon
- tobacco
Nicotiana tabacumt0 - Organ / stage
- rootse0
- Treatment
- oligogalacturonides with DPs 6–18e0
- Outcome
- formation of rootse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Auxin‐induced formation of roots was inhibited by oligogalacturonides with DPs 6–18”
t0“tobacco explants”
Claim · model-written summary
DP 2–8 oligogalacturonides did not inhibit auxin-induced root formation.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- rootst0
- Treatment
- oligogalacturonides with DPs 2–8e0
- Outcome
- formation of rootst0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not by the oligogalacturonides with DPs 2–8”
t0“formation of roots on tobacco explants”
Claim · model-written summary
Increasing auxin prevented inhibition of root formation by larger oligogalacturonides.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- increasing the amount of auxin present in the mediume0
- Outcome
- inhibition of root formatione0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition of root formation by the larger oligogalacturonides was prevented by increasing the amount of auxin present in the medium”
t0“tobacco explants”
Claim · model-written summary
DP 6–18 oligogalacturonides inhibited root formation in tobacco thin cell-layer explants.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- thin cell‐layer (TCL) explantse0
- Treatment
- Oligogalacturonides (DPs 6–18)e0
- Outcome
- root formatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oligogalacturonides (DPs 6–18) also inhibited root formation when added to tobacco thin cell‐layer (TCL) explants”
Claim · model-written summary
DP 10–14 oligogalacturonides were most active in inhibiting root formation in tobacco explants.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- oligogalacturonides with DPs between 10 and 14e0
- Outcome
- formation of rootse0
- Direction
- inhibitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“oligogalacturonides with DPs between 10 and 14 were most active in inhibiting the formation of roots”
t0“tobacco explants”
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See all 7 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.