Flavonoids of white lupin roots participate in phosphorus mobilization from soil
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- 作者：Nicola Tomasi ; Laure Weisskopf ; Giancarlo Renella ; Loretta L ; i ; Roberto Pinton ; Zeno Varanini ; Paolo Nannipieri ; Josè ; Torrent ; Enrico Martinoia ; Stefano Cesco
- 关键词：Lupinus albus ; Cluster roots ; Flavonoids ; Vivianite ; Biomass ; Soil enzymes ; P deficiency
- 刊名：Soil Biology & Biochemistry
- 出版年：2008
- 出版时间：July 2008
- 年：2008
- 卷：40
- 期：7
- 页码：1971-1974
- 全文大小：319 K
文摘
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.