Soil organic matter attenuates the efficacy of flavonoid-based plant-microbe communication
| Autor: | Jonathan J. Silberg, Caroline A. Masiello, Johannes Lehmann, Zachary T. Ball, André Kessler, Tara M. Webster, Ilenne Del Valle, Janice E. Thies, Kevin R. MacKenzie, Mary K. Miller, Hsiao-Ying Cheng |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Nitrogen Chemical structure Environmental Studies Flavonoid 01 natural sciences complex mixtures 03 medical and health sciences Soil heterocyclic compounds Food science Research Articles Plant Physiological Phenomena Soil Microbiology Allelopathy Legume 030304 developmental biology chemistry.chemical_classification Flavonoids Abiotic component 0303 health sciences Minerals Multidisciplinary Ecology Chemistry Soil organic matter fungi SciAdv r-articles food and beverages Soil chemistry Carbon carbohydrates (lipids) Metals Soil microbiology 010606 plant biology & botany Research Article Medicago sativa |
| Zdroj: | Datacite UnpayWall ORCID Microsoft Academic Graph PubMed Central Science Advances |
| Popis: | Dissolved organic carbon in soils can repress flavonoid bioavailability and disrupt plant nodulation. 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. |
| Databáze: | OpenAIRE |
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