Alpha-tocopherol-dependent salt tolerance is more related with auxin synthesis rather than enhancement antioxidant defense in soybean roots
| Autor: | Seda Sereflioglu, Eda Tasci, Burcu Seckin Dinler |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Time Factors Antioxidant Proline medicine.medical_treatment alpha-Tocopherol Sodium Chloride Plant Roots 01 natural sciences Antioxidants General Biochemistry Genetics and Molecular Biology Superoxide dismutase 03 medical and health sciences chemistry.chemical_compound Superoxides Malondialdehyde medicine Glutathione Transferase Plant Proteins General Environmental Science Indoleacetic Acids biology Superoxide Dismutase Chemistry Superoxide food and beverages Hydrogen Peroxide Salt Tolerance Vitamins APX Enzyme assay Isoenzymes Plant Leaves 030104 developmental biology Peroxidases Neurology Biochemistry biology.protein Soybeans 010606 plant biology & botany Peroxidase |
| Zdroj: | Acta Biologica Hungarica. 68:115-125 |
| ISSN: | 1588-256X 0236-5383 |
| DOI: | 10.1556/018.68.2017.1.10 |
| Popis: | In this paper, we describe the alleviated effects of alpha-tocopherol (α-T) on oxidative damage and its possible role as a signal transmitter in plants during salt stress. The results show that exogenously applied α-T under salt stress increased root length and weight, but reduced hydrogen peroxide (H2O2), superoxide anion radical (O2.-) and malondialdehyde (MDA) content in soybean roots. The proline content was reduced by α-T treatment. Interestingly, endogenous auxin (IAA) level was significantly increased after α-T application as compared to salt stress alone. Moreover, α-T reduced significantly superoxide dismutase (SOD) enzyme and isoenzyme activity but upregulated peroxidase (POX) 2, 3 and glutathione-s-transferase (GST) 1, 3 isoenzyme expression. However, ascorbate peroxidase (APX) enzyme activity was not affected at all. Consequently, the results show that α-T serves as a signal molecule under salinity from leaves to roots by increasing remarkably endogenous IAA levels and increasing partially antioxidant activity in roots. |
| Databáze: | OpenAIRE |
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