Nitric oxide regulates water status and associated enzymatic pathways to inhibit nutrients imbalance in maize (Zea mays L.) under drought stress
| Autor: | Khawaja Shafique Ahmad, Iqra Khalid, Kinza Mehmood, Samina Ejaz, Sadia Majeed, Ghulam Farid, Saba Tauseef, Muhammad Ashraf, Muhammad Naeem, Fahim Nawaz |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Nitroprusside Physiology Nitrogen assimilation Drought tolerance Plant Science Nitric Oxide 01 natural sciences Zea mays Nitric oxide Field capacity Lipid peroxidation 03 medical and health sciences chemistry.chemical_compound Nutrient Stress Physiological Genetics Proline fungi food and beverages Water Droughts Plant Leaves Horticulture 030104 developmental biology chemistry Lysimeter 010606 plant biology & botany |
| Zdroj: | Plant physiology and biochemistry : PPB. 155 |
| ISSN: | 1873-2690 |
| Popis: | Nitric oxide (NO) is a key signaling molecule that instigates significant changes in plant metabolic processes and promotes tolerance against various environmental stresses including drought. In this study, we focused on NO-mediated physiological mechanisms and enzymatic activities that influence the nutrient concentrations and yield in maize under drought stress. The drought-tolerant (NK-8711) and sensitive (P-1574) maize hybrids were sown in lysimeter tanks and two levels of water stress (well-watered at100% field capacity and drought stress at 60% field capacity) were applied at three-leaves stage of maize. Foliar treatment of sodium nitroprusside (SNP), the donor of NO was applied at the cob development stage. The results showed that the foliar spray of NO regulated water relations by increasing proline content and improved drought tolerance in water stressed maize plants. In addition, it stimulated the activity of antioxidative enzymes which reduced the production of free radicals and lipid peroxidation. The activities of nitrate assimilation enzymes were considerably increased by NO spray which, in turn, increased nutrient accumulation and yield in maize under water deficit conditions. These results acknowledge the importance of NO as a stress-signaling molecule that positively regulates defense mechanisms in maize to withstand water-limited conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect