Abstract
Legumes are suitable for the development of sustainable agroecosystems because of their ability to use atmospheric N2 through symbiotic nitrogen fixation (SNF). However, a basic NO3− input is necessary before SNF takes place to ensure successful seedling establishment. Since Rhizobia not only induce nodulation but also affect root branching by stimulating the development of lateral roots, and NO3− as a signal also modulates root system architecture, we investigated whether Rhizobium-derived signals interfere in nitrate signaling. Here, we bring evidence that (i) Rhizobium-altered NO3−-mediated processes in pea expressions of major players in NO3− transport, sensing, and signaling were affected, and (ii) the characteristic limitation of root foraging and branching in response to NO3− supply was abolished. The number of tertiary roots per secondary root was higher in infected compared to uninfected peas, thus indicating that the Rhizobium effect allows for favorable management of trade-offs between nodules growth for nitrogen capture and root foraging for water and other nutrient uptake in pea. The outcome of this basic research can be used to produce molecular tools for breeding pea genotypes able to develop deep-foraging and branched root systems, and more competitive architectures and molecular levels for soil NO3− absorption during seedling establishment without jeopardizing nodulation.
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Claims 4
Claim · model-written summary
Rhizobium affected pea expression of nitrate transport, sensing, and signaling players.
- Taxon
- pea
Lathyrus oleraceuse0 - Outcome
- expressions of major players in NO3− transport, sensing, and signalinge0
RhizobiumNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizobium-altered NO3−-mediated processes in pea expressions of major players in NO3− transport, sensing, and signaling were affected”
t0“Pisum sativum”
Claim · model-written summary
Rhizobium abolished nitrate-related limitation of pea root foraging and branching.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- Rhizobiume1
- Outcome
- limitation of root foraging and branchinge0
- Direction
- abolishede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the characteristic limitation of root foraging and branching in response to NO3− supply was abolished.”
e1“Rhizobium-altered NO3−-mediated processes in pea expressions”
t0“Pisum sativum”
Claim · model-written summary
Infected peas had more tertiary roots per secondary root than uninfected peas.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- infectede0
- Outcome
- number of tertiary roots per secondary roote0
- Direction
- highere0
- Comparator
- uninfected pease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of tertiary roots per secondary root was higher in infected compared to uninfected peas”
e1“Rhizobium-altered NO3−-mediated processes in pea expressions”
Claim · model-written summary
The authors interpret the Rhizobium effect as favoring trade-offs between nodule growth and root foraging.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- favorable management of trade-offs between nodules growth for nitrogen capture and root foraging for water and other nutrient uptakee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Rhizobium effect allows for favorable management of trade-offs between nodules growth for nitrogen capture and root foraging for water and other nutrient uptake in pea.”
The same questions in other papers
Rhizobium · growth · Lathyrus oleraceus (pea)Positive and negative results
20 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
18 papers more in this group
See all 22 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.