Bacterial siderophores efficiently provide iron to iron-starved tomato plants in hydroponics culture
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ID: 113999
2013
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Abstract
Iron is one of the essential elements for a proper plant development. Providing plants with an accessible form of iron is crucial when it is scant or unavailable in soils. Chemical chelates are the only current alternative and are highly stable in soils, therefore, posing a threat to drinking water. The aim of this investigation was to quantify siderophores produced by two bacterial strains and to determine if these bacterial siderophores would palliate chlorotic symptoms of iron-starved tomato plants. For this purpose, siderophore production in MM9 medium by two selected bacterial strains was quantified, and the best was used for biological assay. Bacterial culture media free of bacteria (S) and with bacterial cells (BS), both supplemented with Fe were delivered to 12-week-old plants grown under iron starvation in hydroponic conditions; controls with full Hoagland solution, iron-free Hoagland solution and water were also conducted. Treatments were applied twice along the experiment, with a week in between. At harvest, plant yield, chlorophyll content and nutritional status in leaves were measured. Both the bacterial siderophore treatments significantly increased plant yield, chlorophyll and iron content over the positive controls with full Hoagland solution, indicating that siderophores are effective in providing Fe to the plant, either with or without the presence of bacteria. In summary, siderophores from strain Chryseobacterium C138 are effective in supplying Fe to iron-starved tomato plants by the roots, either with or without the presence of bacteria. Based on the amount of siderophores produced, an effective and economically feasible organic Fe chelator could be developed.
| Reference Key |
radzki2013antoniebacterial
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| Authors | W. Radzki;F. J. Gutierrez Mañero;E. Algar;J. A. Lucas García;A. García-Villaraco;B. Ramos Solano;W. Radzki;F. J. Gutierrez Mañero;E. Algar;J. A. Lucas García;A. García-Villaraco;B. Ramos Solano; |
| Journal | antonie van leeuwenhoek |
| Year | 2013 |
| DOI |
doi:10.1007/s10482-013-9954-9
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