Abstract
Abstract The Rhizobium leguminosarum bv. trifolii Sym plasmid pRtr5a was transferred by conjugation to R. meliloti strains deleted or mutated in the nod and fix genes, and also to a plasmid‐less strain of Agrobacterium tumefaciens . The plasmid transfer led to the elimination of the resident cryptic plasmid of the R. meliloti recipients. The Sym plasmid of the recipients was only eliminated in the case of a deletion. In some cases the transferred plasmid was instable. The nod and nif/fix genes of R. leguminosarum bv. trifolii were expressed in R. meliloti and somewhat delayed in A. tumefaciens . A high level of nitrogen fixation on clover was only found in R. meliloti containing pRtr5a. However, this occurred only if the nif/fix genes of the recipient had been deleted before. Inoculation of clover with this R. meliloti strain resulted in a higher dry matter production in comparison to clover inoculated with the donor strain.
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Claims 7
Claim · model-written summary
Transferred Sym plasmid eliminated the recipient R. meliloti cryptic plasmid.
- Interactor
- R. meliloti
Sinorhizobium melilotie0symbiont - Outcome
- elimination of the resident cryptic plasmide0
TrifoliumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plasmid transfer led to the elimination of the resident cryptic plasmid of the R. meliloti recipients”
t0“clover”
Claim · model-written summary
Recipient Sym plasmid was eliminated only in the deletion case.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Sym plasmid of the recipients was only eliminated in the case of a deletion”
t0“clover”
Claim · model-written summary
The transferred plasmid was unstable in some cases.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In some cases the transferred plasmid was instable”
t0“clover”
Claim · model-written summary
R. leguminosarum nod and nif/fix genes were expressed in R. meliloti.
- Interactor
- R. melilotiSinorhizobium melilotie0symbiont
- Gene
- nod and nif/fix genese0
- Outcome
- expressed in R. melilotie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nod and nif/fix genes of R. leguminosarum bv. trifolii were expressed in R. meliloti and somewhat delayed in A. tumefaciens”
t0“clover”
Claim · model-written summary
R. leguminosarum nod and nif/fix expression was somewhat delayed in A. tumefaciens.
- Interactor
- A. tumefaciens
Agrobacterium tumefaciense0other - Gene
- nod and nif/fix genese0
- Outcome
- delayed in A. tumefaciense0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nod and nif/fix genes of R. leguminosarum bv. trifolii were expressed in R. meliloti and somewhat delayed in A. tumefaciens”
t0“clover”
Claim · model-written summary
High nitrogen fixation on clover occurred only with R. meliloti containing pRtr5a after recipient nif/fix deletion.
- Interactor
- R. melilotiSinorhizobium melilotie0symbiont
- Outcome
- nitrogen fixation on clovere0
- Direction
- highe0
- Qualifier
- only if the nif/fix genes of the recipient had been deleted beforee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high level of nitrogen fixation on clover was only found in R. meliloti containing pRtr5a. However, this occurred only if the nif/fix genes of the recipient had been deleted before”
Claim · model-written summary
Inoculation with the R. meliloti strain raised clover dry matter versus donor strain inoculation.
- Treatment
- Inoculation of clover with this R. meliloti straine0
- Interactor
- R. melilotiSinorhizobium melilotie0symbiont
- Outcome
- dry matter productione0
- Direction
- highere0
- Comparator
- clover inoculated with the donor straine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of clover with this R. meliloti strain resulted in a higher dry matter production in comparison to clover inoculated with the donor strain”
The same questions in other papers
inoculation · yield · TrifoliumPositive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
7 papers more in this group
See all 11 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.