Strategies in a metallophyte species to cope with manganese excess
| Autor: | Maria Manuela Abreu, Sabina Rossini-Oliva, Eduardo O. Leidi |
|---|---|
| Přispěvatelé: | Rossini Oliva, S., Abreu, M. M., González Grau, Juan Miguel, Universidad de Sevilla. Departamento de Biología Vegetal y Ecología, Rossini Oliva, S. [0000-0001-6774-4723], Abreu, M. M. [0000-0002-6650-1161], González Grau, Juan Miguel [0000-0003-4746-6775] |
| Rok vydání: | 2020 |
| Předmět: |
Chlorophyll
Environmental Engineering 010504 meteorology & atmospheric sciences Uptake chemistry.chemical_element peroxidase Superoxide dismutase Manganese 010501 environmental sciences Photosynthesis Plant Roots 01 natural sciences Antioxidants Nutrient Metallophyte Geochemistry and Petrology Organic acids organic acids Environmental Chemistry Biomass Carotenoid Peroxidase 0105 earth and related environmental sciences General Environmental Science Water Science and Technology chemistry.chemical_classification amino acids Chlorosis biology catalase General Medicine Catalase Adaptation Physiological superoxide dismutase Plant Leaves Horticulture Erica andevalensis chemistry uptake manganese metallophytes Metallophytes biology.protein Amino acids Ericaceae |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1573-2983 0269-4042 |
| DOI: | 10.1007/s10653-020-00625-z |
| Popis: | 13 páginas.- 5 figuras.- 6 tablas.- referencias The effect of exposure to high Mn concentration was studied in a metallophyte species, Erica andevalensis, using hydroponic cultures with a range of Mn concentrations (0.06, 100, 300, 500, and 700 mg L−1). At harvest, biomass production, element uptake, and biochemical indicators of metal stress (leaf pigments, organic acids, amino acids, phenols, and activities of catalase, peroxidase, superoxide dismutase) were determined in leaves and roots. Increasing Mn concentrations led to a decrease in biomass accumulation, and tip leaves chlorosis was the only toxicity symptom detected. In a similar way, photosynthetic pigments (chlorophylls a and b, and carotenoids) were affected by high Mn levels. Among organic acids, malate and oxalate contents in roots showed a significant increase at the highest Mn concentration, while in leaves, Mn led to an increasing trend in citrate and malate contents. An increase of Mn also induced an increase in superoxide dismutase activity in roots and catalase activity in leaves. As well, significant changes in free amino acids were induced by Mn concentrations higher than 300 mg L−1, especially in roots. No significant changes in phenolic compounds were observed in the leaves, but root phenolics were significantly increased by increasing Mn concentrations in treatments. When Fe supply was increased 10 and 20 times (7–14 mg Fe L−1 as Fe-EDDHA) in the nutrient solutions at the highest Mn concentration (700 mg Mn L−1), it led to significant increases in photosynthetic pigments and biomass accumulation. Manganese was mostly accumulated in the roots, and the species was essentially a Mn excluder. However, considering the high leaf Mn concentration recorded without toxicity symptoms, E. andevalensis might be rated as a Mn-tolerant species. |
| Databáze: | OpenAIRE |
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