Abstract
The regulatory mechanisms by which AMF modulate the integrated carbon (C)-nitrogen (N)-phosphorus (P) metabolic network in woody plant leaves remain unclear. We investigated how varying nitrate (NO3−) and phosphate (Pi) supply, with or without AMF inoculation, reshapes the leaf metabolic network in poplar seedlings. Key findings reveal that AMF acts as a central metabolic hub, optimizing C-N-P coordination in an environment-dependent manner. Under low Pi, NO3− supply enhanced P remobilization and photosynthetic efficiency, boosting growth. AMF further optimized low-Pi adaptation by promoting P storage and buffering, significantly improving photosynthesis and biomass. Under high Pi, NO3− supply shifted focus towards enhancing Rubisco-mediated carbon assimilation. AMF synergistically improved carbon assimilation efficiency and suppressed non-essential P recycling. N metabolism effects of Pi were contingent on NO3− availability, and AMF reprogrammed N assimilation pathways accordingly, balancing uptake and utilization under different N regimes. Critically, AMF orchestrated environment-specific metabolic adjustments, reinforcing P buffering and photosynthetic gain under Pi limitation, and enhancing C assimilation efficiency while minimizing P waste under Pi sufficiency. This study demonstrates that poplar leaf C-N-P networks are reconfigured through N-P synergisms modulated by AMF, positioning AMF as a pivotal integrator of nutrient acquisition and allocation. These insights provide a physiological foundation for developing efficient forestry nutrient management and mycorrhizal application strategies.
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Claims 9
Claim · model-written summary
Under low phosphate, nitrate supply enhanced P remobilization and photosynthetic efficiency and boosted growth.
- Treatment
- NO3− supplye0
- Outcome
- P remobilization and photosynthetic efficiencye0
- Direction
- enhancede0
- Comparator
- low Pie0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under low Pi, NO3− supply enhanced P remobilization and photosynthetic efficiency, boosting growth.”
e1“poplar seedlings”
Claim · model-written summary
Under low phosphate, nitrate supply boosted poplar growth.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under low Pi, NO3− supply enhanced P remobilization and photosynthetic efficiency, boosting growth.”
e1“poplar seedlings”
Claim · model-written summary
AMF promoted P storage and buffering under low phosphate.
- Treatment
- AMFe0
- Interactor
- AMFe0symbiont
- Outcome
- P storage and bufferinge0
- Direction
- promotinge0
- Comparator
- low-Pie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AMF further optimized low-Pi adaptation by promoting P storage and buffering, significantly improving photosynthesis and biomass.”
e1“poplar seedlings”
Claim · model-written summary
AMF significantly improved photosynthesis and biomass under low phosphate.
- Treatment
- AMFe0
- Interactor
- AMFe0symbiont
- Outcome
- photosynthesis and biomasse0
- Direction
- improvinge0
- Comparator
- low-Pie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AMF further optimized low-Pi adaptation by promoting P storage and buffering, significantly improving photosynthesis and biomass.”
e1“poplar seedlings”
Claim · model-written summary
Under high phosphate, nitrate supply enhanced Rubisco-mediated carbon assimilation.
- Treatment
- NO3− supplye0
- Gene
- Rubiscoe0
- Outcome
- Rubisco-mediated carbon assimilatione0
- Direction
- enhancinge0
- Comparator
- high Pie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under high Pi, NO3− supply shifted focus towards enhancing Rubisco-mediated carbon assimilation.”
e1“poplar seedlings”
Claim · model-written summary
AMF improved carbon assimilation efficiency under high phosphate.
- Treatment
- AMFe0
- Interactor
- AMFe0symbiont
- Outcome
- carbon assimilation efficiencye0
- Direction
- improvede0
- Comparator
- high Pie2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AMF synergistically improved carbon assimilation efficiency and suppressed non-essential P recycling.”
e1“poplar seedlings”
e2“Under high Pi”
Claim · model-written summary
AMF suppressed non-essential P recycling under high phosphate.
- Treatment
- AMFe0
- Interactor
- AMFe0symbiont
- Outcome
- non-essential P recyclinge0
- Direction
- suppressede0
- Comparator
- high Pie2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AMF synergistically improved carbon assimilation efficiency and suppressed non-essential P recycling.”
e1“poplar seedlings”
e2“Under high Pi”
Claim · model-written summary
Effects of phosphate on N metabolism depended on nitrate availability.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N metabolism effects of Pi were contingent on NO3− availability”
e1“poplar seedlings”
Claim · model-written summary
AMF reprogrammed N assimilation pathways according to nitrate availability, balancing uptake and utilization.
- Treatment
- AMFe0
- Interactor
- AMFe0symbiont
- Outcome
- N assimilation pathwayse0
- Comparator
- different N regimese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AMF reprogrammed N assimilation pathways accordingly, balancing uptake and utilization under different N regimes.”
e1“poplar seedlings”
The same questions in other papers
mycorrhiza · physiology: photosynthesis · Populus (poplar)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.