Stress responses and nickel and zinc accumulation in different accessions of Stellaria media (L.) Vill. in response to solution pH variation in hydroponic culture
| Autor: | Annalisa Tassoni, Antony van der Ent, Mirko Salinitro, Alice Tognacchini |
|---|---|
| Přispěvatelé: | Salinitro, Mirko, van der Ent, Antony, Tognacchini, Alice, Tassoni, Annalisa |
| Rok vydání: | 2020 |
| Předmět: |
Plant stress
0106 biological sciences 0301 basic medicine Physiology Stellaria chemistry.chemical_element Caryophyllaceae Plant Science Zinc Antioxidant compound Photosynthesis 01 natural sciences 03 medical and health sciences Pigment food Hydroponics Nickel Antioxidant compounds Soil pH Stellaria media Genetics Soil Pollutants Flavonoids biology Polyphenols food and beverages Plant stre Hydrogen-Ion Concentration biology.organism_classification food.food Horticulture Heavy metal 030104 developmental biology Heavy metals chemistry Oxidative stress visual_art Shoot Flavonoid visual_art.visual_art_medium Oxidative stre Metal uptake 010606 plant biology & botany |
| Zdroj: | Plant Physiology and Biochemistry 148 (2020) Plant Physiology and Biochemistry, 148, 133-141 |
| ISSN: | 0981-9428 |
| DOI: | 10.1016/j.plaphy.2020.01.012 |
| Popis: | In most non-hyperaccumulating plants, Ni and Zn uptake is negatively correlated with soil pH, however, few studies so far have investigated how pH influences the activity and uptake of Ni and Zn in plants grown in a hydroponic system, which generally allows culture variables to be singularly manipulated. In this study, the non-accumulator Stellaria media (L.) Vill. (Caryophyllaceae) had opposite trends of Ni and Zn uptake along a pH gradient (between 5 and 8 for Zn and between 5 and 6.5 for Ni), when grown in hydroponics. In all treatments, the solution metal concentration was fixed at 0.1mM Ni or 0.55mM Zn. Nickel accumulation increased with increasing pH with an average concentration in shoots of 167 μg/gDW at pH 5 and of 250 μg/gDW at pH 6.5. In contrast, Zn accumulation decreased with increasing pH, with an average concentration in shoots varying from 1640 μg/gDW, at pH 5, to 435 μg/gDW at pH 8. Assessment of total polyphenol and flavonoid contents and of antioxidant activity showed that these parameters were positively correlated with Ni or Zn accumulation in S. media shoots, while photosynthetic pigments content and root and shoot biomass were negatively correlated with Ni and Zn accumulation. The study was carried out on five different S. media populations, which did not show differences in relation to the accumulation of metals and synthesis of antioxidant compounds, nonetheless showing a different biomass production under control conditions. |
| Databáze: | OpenAIRE |
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