Abstract
Exogenous ethylene inhibited nodulation on the primary and lateral roots of pea, Pisum sativum L. cv Sparkle. Ethylene was more inhibitory to nodule formation than to root growth; nodule number was reduced by half with only 0.07 muL/L ethylene applied continually to the roots for 3 weeks. The inhibition was overcome by treating roots with 1 mum Ag(+), an inhibitor of ethylene action. Exogenous ethylene also inhibited nodulation on sweet clover (Melilotus alba) and on pea mutants that are hypernodulating or have ineffective nodules. Exogenous ethylene did not decrease the number of infections per centimeter of lateral pea root, but nearly all of the infections were blocked when the infection thread was in the basal epidermal cell or in the outer cortical cells.
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Claims 8
Claim · model-written summary
Exogenous ethylene inhibited nodulation on primary and lateral pea roots.
- Taxon
- pea
Lathyrus oleraceuse0 - Material
- Pisum sativum L. cv Sparklee0
- Organ / stage
- primary and lateral rootse0
- Treatment
- Exogenous ethylenee0
- Outcome
- nodulatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous ethylene inhibited nodulation on the primary and lateral roots of pea, Pisum sativum L. cv Sparkle.”
Claim · model-written summary
Ethylene reduced nodule number by half at 0.07 muL/L over three weeks.
- Taxon
- Pisum sativum L. cv SparkleLathyrus oleraceust0
- Treatment
- 0.07 muL/L ethylenee0
- Outcome
- nodule numbere0
- Direction
- reducede0
- Value
- by halfe0
- Qualifier
- for 3 weekse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nodule number was reduced by half with only 0.07 muL/L ethylene applied continually to the roots for 3 weeks”
t0“Pisum sativum L. cv Sparkle”
Claim · model-written summary
Ethylene inhibited nodule formation more than root growth.
- Taxon
- Pisum sativum L. cv SparkleLathyrus oleraceust0
- Treatment
- Ethylenee0
- Outcome
- nodule formatione0
- Direction
- more inhibitorye0
- Comparator
- root growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene was more inhibitory to nodule formation than to root growth”
t0“Pisum sativum L. cv Sparkle”
Claim · model-written summary
Silver treatment overcame ethylene inhibition of nodulation.
- Taxon
- Pisum sativum L. cv SparkleLathyrus oleraceust0
- Treatment
- 1 mum Ag(+)e0
- Outcome
- inhibitione0
- Direction
- overcomee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition was overcome by treating roots with 1 mum Ag(+), an inhibitor of ethylene action.”
t0“Pisum sativum L. cv Sparkle”
Claim · model-written summary
Exogenous ethylene inhibited sweet clover nodulation.
Not reportedComparator
Verbatim
e0“Exogenous ethylene also inhibited nodulation on sweet clover (Melilotus alba)”
Claim · model-written summary
Exogenous ethylene inhibited nodulation in hypernodulating and ineffective-nodule pea mutants.
- Taxon
- peaLathyrus oleraceuse0
- Material
- pea mutantse0
- Treatment
- Exogenous ethylenee0
- Outcome
- nodulatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous ethylene also inhibited nodulation on sweet clover (Melilotus alba) and on pea mutants that are hypernodulating or have ineffective nodules.”
Claim · model-written summary
Exogenous ethylene did not decrease infection density on lateral pea roots.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Exogenous ethylenee0
- Outcome
- number of infections per centimeter of lateral pea roote0
- Direction
- did not decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous ethylene did not decrease the number of infections per centimeter of lateral pea root”
Claim · model-written summary
Nearly all infections were blocked at the basal epidermal or outer cortical cell stage.
- Taxon
- Pisum sativum L. cv SparkleLathyrus oleraceust0
- Organ / stage
- basal epidermal cell or in the outer cortical cellse0
- Outcome
- infections were blockede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nearly all of the infections were blocked when the infection thread was in the basal epidermal cell or in the outer cortical cells”
t0“Pisum sativum L. cv Sparkle”
The same questions in other papers
ethene · symbiosis · Lathyrus oleraceus (pea)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- 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.