Abstract
Lima bean plants (Phaseolus lunatus L.) inoculated with Rhizobium sp. strain 127E14, which lacks constitutive nitrate reductase activity, were significantly taller after 4 weeks of age than plants inoculated with strain 127E15, which contains constitutive nitrate reductase activity. Plants inoculated with either strain responded to application of 5 micrograms gibberellic acid per plant with rapid internode elongation; plants inoculated with strain 127E15 became less responsive to gibberellic acid from 3 to 5 weeks of age, while plants inoculated with strain 127E14 did not. The height of plants inoculated with strain 127E14 was reduced by 20% with application of gibberellin biosynthesis inhibitors to the roots, while height of plants inoculated with strain 127E15 was unaffected.Plants inoculated with strain 127E14 developed nodules containing 4 to 50 times greater quantities of extractable gibberellin-like substances than the nodules of plants inoculated with strain 127E15. Plants inoculated with strain 127E14 had nodules containing larger quantities of gibberellin-like substances in both the acidic and basic ethyl acetate fractions, and these differences were observed before the onset of rapid growth responsible for the difference in plant height.The internode elongation in plants infected with strain 127E14, its reversal by gibberellin biosynthesis inhibitors, and the accumulation of large quantities of gibberellin-like substances in nodules infected with strain 127E14 support the hypothesis that root nodules may contribute gibberellins to the host.
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Claims 9
Claim · model-written summary
Plants inoculated with strain 127E14 were significantly taller after four weeks than those inoculated with 127E15.
- Taxon
- Phaseolus lunatus L.
Phaseolus lunatuse0 - Treatment
- inoculated with Rhizobium sp. strain 127E14e0
- Interactor
- Rhizobium sp. strain 127E14
Rhizobium sp.e0symbiont - Outcome
- tallere0
- Direction
- tallere0
- Qualifier
- after 4 weeks of agee0
- Comparator
- strain 127E15e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lima bean plants (Phaseolus lunatus L.) inoculated with Rhizobium sp. strain 127E14, which lacks constitutive nitrate reductase activity, were significantly taller after 4 weeks of age than plants inoculated with strain 127E15, which contains constitutive nitrate reductase activity”
Claim · model-written summary
Both inoculated plant groups rapidly elongated their internodes after gibberellic acid application.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Treatment
- application of 5 micrograms gibberellic acid per plante0
- Outcome
- internode elongatione0
- Direction
- rapide0
- Qualifier
- either straine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants inoculated with either strain responded to application of 5 micrograms gibberellic acid per plant with rapid internode elongation”
t0“Phaseolus lunatus L.”
Claim · model-written summary
Responsiveness to gibberellic acid declined from three to five weeks in plants inoculated with strain 127E15.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Treatment
- gibberellic acide0
- Interactor
- strain 127E15e0symbiont
- Outcome
- responsive to gibberellic acide0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants inoculated with strain 127E15 became less responsive to gibberellic acid from 3 to 5 weeks of age”
t0“Phaseolus lunatus L.”
Claim · model-written summary
Responsiveness to gibberellic acid did not decline from three to five weeks in plants inoculated with strain 127E14.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Interactor
- strain 127E14e0symbiont
- Outcome
- plants inoculated with strain 127E14 did note0
- Qualifier
- from 3 to 5 weeks of agee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants inoculated with strain 127E14 did not”
e1“from 3 to 5 weeks of age, while plants inoculated with strain 127E14 did not”
t0“Phaseolus lunatus L.”
Claim · model-written summary
Gibberellin biosynthesis inhibitors reduced height by 20% in plants inoculated with strain 127E14.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Treatment
- application of gibberellin biosynthesis inhibitors to the rootse0
- Interactor
- strain 127E14e0symbiont
- Outcome
- heighte0
- Direction
- reducede0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The height of plants inoculated with strain 127E14 was reduced by 20% with application of gibberellin biosynthesis inhibitors to the roots”
t0“Phaseolus lunatus L.”
Claim · model-written summary
Gibberellin biosynthesis inhibitors did not change height in plants inoculated with strain 127E15.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Treatment
- application of gibberellin biosynthesis inhibitors to the rootse1
- Interactor
- strain 127E15e0symbiont
- Outcome
- heighte0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“height of plants inoculated with strain 127E15 was unaffected”
e1“with application of gibberellin biosynthesis inhibitors to the roots, while height of plants inoculated with strain 127E15 was unaffected”
t0“Phaseolus lunatus L.”
Claim · model-written summary
Nodules of plants inoculated with 127E14 contained 4 to 50 times more extractable gibberellin-like substances than those inoculated with 127E15.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Organ / stage
- nodulese0
- Interactor
- strain 127E14e0symbiont
- Outcome
- quantities of extractable gibberellin-like substancese0
- Direction
- greatere0
- Value
- 4 to 50 timese0
- Comparator
- strain 127E15e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants inoculated with strain 127E14 developed nodules containing 4 to 50 times greater quantities of extractable gibberellin-like substances than the nodules of plants inoculated with strain 127E15”
t0“Phaseolus lunatus L.”
Claim · model-written summary
Nodules of 127E14-inoculated plants had larger amounts of gibberellin-like substances in acidic and basic ethyl acetate fractions before the height difference emerged.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Organ / stage
- nodulese0
- Interactor
- strain 127E14e0symbiont
- Outcome
- quantities of gibberellin-like substances in both the acidic and basic ethyl acetate fractionse0
- Direction
- largere0
- Qualifier
- before the onset of rapid growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants inoculated with strain 127E14 had nodules containing larger quantities of gibberellin-like substances in both the acidic and basic ethyl acetate fractions, and these differences were observed before the onset of rapid growth responsible for the difference in plant height”
t0“Phaseolus lunatus L.”
Claim · model-written summary
The authors hypothesize that root nodules contribute gibberellins to the host.
- Taxon
- Phaseolus lunatus L.Phaseolus lunatust0
- Organ / stage
- root nodulese0
- Outcome
- contribute gibberellins to the hoste0
- Qualifier
- may contribute gibberellins to the hoste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“support the hypothesis that root nodules may contribute gibberellins to the host”
t0“Phaseolus lunatus L.”
The same questions in other papers
inoculation · growth · Phaseolus lunatus (lima bean)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.