Low pH altered salt stress in antioxidant metabolism and nitrogen assimilation in ginger ( Zingiber officinale ) seedlings
| Autor: | Bili Cao, Xuena Liu, Fengman Yin, Kun Xu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Antioxidant Nitrogen Physiology medicine.medical_treatment Nitrogen assimilation Glutathione reductase Ascorbic Acid Plant Science Ginger Salt Stress 01 natural sciences Antioxidants Superoxide dismutase 03 medical and health sciences chemistry.chemical_compound Ascorbate Peroxidases Malondialdehyde Genetics medicine Food science biology Superoxide Dismutase Hydrogen Peroxide Cell Biology General Medicine Glutathione Hydrogen-Ion Concentration Catalase APX Oxidative Stress 030104 developmental biology chemistry Seedlings biology.protein 010606 plant biology & botany |
| Zdroj: | Physiologia Plantarum. 168:648-659 |
| ISSN: | 1399-3054 0031-9317 |
| DOI: | 10.1111/ppl.13011 |
| Popis: | The effects of low pH on antioxidant metabolism and nitrogen (N) assimilation in ginger seedlings under salt stress were investigated. A two-way randomized block design was used: the main treatment consisted of two pH levels, normal and low pH (6.0 and 4.0, respectively), and the other treatment consisted of two salinity levels, 0 and 100 mmol l-1 Na+ (NaCl and Na2 SO4 ). The results showed that low pH decreased the malondialdehyde (MDA) and hydrogen peroxide contents of ginger seedling leaves under salt stress. Moreover, low pH and salt stress significantly decreased the contents of non-enzymatic antioxidants, including ascorbate (AsA) and glutathione (GSH), and increased the activities of antioxidant enzymes, such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and glutathione reductase (GR). In addition, salt stress inhibited the N assimilation process in ginger seedling leaves, but low pH improved N assimilation under salt stress. Our finding was that low pH alleviated oxidative damage and promoted N assimilation under salt stress. |
| Databáze: | OpenAIRE |
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