title: Green bean biofortification for Si through soilless cultivation: plant response and Si bioaccessibility in pods.
abstract: Food plants biofortification for micronutrients is a tool for the nutritional value improvement of food. Soilless cultivation systems, with the optimal control of plant nutrition, represent a potential effective technique to increase the beneficial element content in plant tissues. Silicon (Si), which proper intake is recently recommended for its beneficial effects on bone health, presents good absorption in intestinal tract from green bean, a high-value vegetable crop. In this study we aimed to obtain Si biofortified green bean pods by using a Si-enriched nutrient solution in soilless system conditions, and to assess the influence of boiling and steaming cooking methods on Si content, color parameters and Si bioaccessibility (by using an in vitro digestion process) of pods. The Si concentration of pods was almost tripled as a result of the biofortification process, while the overall crop performance was not negatively influenced. The Si content of biofortified pods was higher than unbiofortified also after cooking, despite the cooking method used. Silicon bioaccessibility in cooked pods was more than tripled as a result of biofortification, while the process did not affect the visual quality of the product. Our results demonstrated that soilless cultivation can be successfully used for green bean Si biofortification.
authors.affiliation: Institute of Sciences of Food Production, CNR - National Research Council of Italy, Via G. Amendola, 122/O-70126 Bari, Italy.
authors.forename: Francesco Fabiano
authors.initials: FF
authors.lastname: Montesano
authors.affiliation: Institute of Sciences of Food Production, CNR - National Research Council of Italy, Via G. Amendola, 122/O-70126 Bari, Italy.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: D'Imperio
authors.affiliation: Institute of Sciences of Food Production, CNR - National Research Council of Italy, Via G. Amendola, 122/O-70126 Bari, Italy.
authors.forename: Angelo
authors.initials: A
authors.lastname: Parente
authors.affiliation: Institute of Sciences of Food Production, CNR - National Research Council of Italy, Via G. Amendola, 122/O-70126 Bari, Italy.
authors.forename: Angela
authors.initials: A
authors.lastname: Cardinali
authors.affiliation: Institute of Sciences of Food Production, CNR - National Research Council of Italy, Via G. Amendola, 122/O-70126 Bari, Italy.|Department of Agricultural and Environmental Science - University of Bari Aldo Moro, Via Amendola, 165/A-70126 Bari, Italy.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Renna
authors.affiliation: Institute of Sciences of Food Production, CNR - National Research Council of Italy, Via G. Amendola, 122/O-70126 Bari, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Serio
mesh_terms: D000072759:Biofortification; D001682:Biological Availability; D007887:Fabaceae / Q000254:growth & development* / Q000378:metabolism; D012825:Silicon / Q000378:metabolism*
chemical_list: D012825:Silicon