Effect of inoculation with arbuscular mycorrhizal fungi and blanching on the bioaccessibility of heavy metals in water spinach (Ipomoea aquatica Forsk.)
| Autor: | Chun-Ming Lam, Hung-Yu Lai |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Blanching Health Toxicology and Mutagenesis Biological Availability chemistry.chemical_element 010501 environmental sciences Ipomoea 01 natural sciences Soil food Metals Heavy Mycorrhizae Soil Pollutants Food science 0105 earth and related environmental sciences Cadmium biology Inoculation Phosphorus Ipomoea aquatica Public Health Environmental and Occupational Health food and beverages General Medicine Hydrogen-Ion Concentration biology.organism_classification Pollution food.food chemistry Soil water Spinach 010606 plant biology & botany |
| Zdroj: | Ecotoxicology and Environmental Safety. 162:563-570 |
| ISSN: | 0147-6513 |
| DOI: | 10.1016/j.ecoenv.2018.07.047 |
| Popis: | A plant's tolerance to heavy metals (HMs) and its detoxification mechanisms are associated with the subcellular distribution of HMs and their chemical forms. In this study, water spinach (Ipomoea aquatica Forsk.) was grown in two soils contaminated with a single HM (cadmium, Cd) or combined HMs (Cd and nickel, Ni). Inoculation of arbuscular mycorrizal fungi (AMF) was conducted to increase the accumulation of phosphorus (P) in plants. One major exception was to decrease the migration and accumulation of HMs in edible parts by the formation of P-HM complexes. The effects of blanching and simulated digestion on bioaccessibility were also assessed. The experimental results showed that the water spinach species used in this study had a high capacity to accumulate HMs. AMF treatment improved water spinach growth and decreased the accumulation of Ni but not that of Cd. Soluble and inorganic Cd and Ni were the major subcellular fractions and chemical forms in water spinach; these two HMs also exhibited higher migration capacities in comparison to chromium (Cr). Relative to raw tissues, 45–84% of Cd, Cr, and Ni were leached after blanching. Approximately 32–55%, 16–50%, and 27–40% of Cd, Cr, and Ni, respectively, were bioaccessible and could be metabolized by in vitro digestive fluids. |
| Databáze: | OpenAIRE |
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