Abstract
Plant-microbe interactions are mediated by signaling compounds that control vital plant functions, such as nodulation, defense, and allelopathy. While interruption of signaling is typically attributed to biological processes, potential abiotic controls remain less studied. Here, we show that higher organic carbon (OC) contents in soils repress flavonoid signals by up to 70%. Furthermore, the magnitude of repression is differentially dependent on the chemical structure of the signaling molecule, the availability of metal ions, and the source of the plant-derived OC. Up to 63% of the signaling repression occurs between dissolved OC and flavonoids rather than through flavonoid sorption to particulate OC. In plant experiments, OC interrupts the signaling between a legume and a nitrogen-fixing microbial symbiont, resulting in a 75% decrease in nodule formation. Our results suggest that soil OC decreases the lifetime of flavonoids underlying plant-microbe interactions.
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Claims 4
Claim · model-written summary
Higher soil organic carbon repressed flavonoid signals by up to 70%.
Verbatim
e0“higher organic carbon (OC) contents in soils repress flavonoid signals by up to 70%”
t0“plant-microbe communication”
e1“In plant experiments, OC interrupts the signaling between a legume and a nitrogen-fixing microbial symbiont, resulting in a 75% decrease in nodule formation”
Claim · model-written summary
Repression depended on signaling molecule structure, metal ions and plant derived carbon source.
Not reportedDirection
Verbatim
e0“the magnitude of repression is differentially dependent on the chemical structure of the signaling molecule, the availability of metal ions, and the source of the plant-derived OC”
t0“plant-microbe communication”
e1“In plant experiments, OC interrupts the signaling between a legume and a nitrogen-fixing microbial symbiont, resulting in a 75% decrease in nodule formation”
Claim · model-written summary
Up to 63% of repression occurred between dissolved carbon and flavonoids.
Not reportedTaxon
Verbatim
e0“Up to 63% of the signaling repression occurs between dissolved OC and flavonoids rather than through flavonoid sorption to particulate OC”
Claim · model-written summary
Organic carbon interrupted legume symbiont signaling and decreased nodules by 75%.
- Taxon
- legumee0
- Treatment
- OCe0
- Interactor
- nitrogen-fixing microbial symbionte0symbiont
- Outcome
- nodule formatione0
- Direction
- decreasee0
- Value
- 75%e0
Not reportedComparator
Verbatim
e0“In plant experiments, OC interrupts the signaling between a legume and a nitrogen-fixing microbial symbiont, resulting in a 75% decrease in nodule formation”