Flavonoids of white lupin roots participate in phosphorus mobilization from soil |
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| Authors: | Nicola Tomasi Laure Weisskopf Giancarlo Renella Loretta Landi Roberto Pinton Zeno Varanini Paolo Nannipieri Josè Torrent Enrico Martinoia Stefano Cesco |
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| Institution: | 1. Dipartimento di Scienze Agrarie e Ambientali, University of Udine, via delle Scienze 208, I-33100 Udine, Italy;2. Institut für Pflanzenbiologie, University of Zurich, Switzerland;3. Dipartimento di Scienza del Suolo e Nutrizione della Pianta, University of Firenze, Italy;4. Dipartimento di Scienze Tecnologie e Mercati della Vite e del Vino, University of Verona, Italy;5. Departamento de Ciencias y Recursos Agrícolas y Forestales, University of Córdoba, Spain |
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| Abstract: | The impact of flavonoids released by phosphorus-deficient white lupin roots on inorganic P and soil microorganisms is largely unknown. We report that flavonoids isolated from white lupin roots mobilized inorganic phosphorus and decreased soil microbial respiration, citrate mineralization, and soil phosphohydrolase activities, but did not reduce the soil ATP content. The results suggest that white lupin's release of flavonoids into the rhizosphere plays a significant role in its efficient P-acquisition strategy by solubilizing Fe-bound P and by limiting the microbial mineralization of citrate. |
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