Extremely High Boron Tolerance In Puccinellia Distans (Jacq.) Parl. Related To Root Boron Exclusion And A Well-Regulated Antioxidant System
| Autor: | Richard W. Bell, Seyit Ali Kayis, Sait Gezgin, Canan Özdemir, Ersin Minareci, Tijen Demiral Sert, Zuhal Zeynep Avsaroglu, Erdogan E. Hakki, Mehmet Hamurcu |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Antioxidant Time Factors Nitrogen medicine.medical_treatment Glutathione reductase Poaceae 01 natural sciences Plant Roots General Biochemistry Genetics and Molecular Biology Antioxidants Superoxide dismutase Lipid peroxidation 03 medical and health sciences chemistry.chemical_compound Soil Ascorbate Peroxidases Botany medicine Puccinellia distans Boron Peroxidase biology Chemistry Superoxide Dismutase Biological Transport Hydrogen Peroxide biology.organism_classification Catalase Adaptation Physiological Plant Leaves 030104 developmental biology Glutathione Reductase Biochemistry biology.protein Puccinellia Lipid Peroxidation Reactive Oxygen Species Plant Shoots 010606 plant biology & botany |
| Popis: | Recent studies indicate an extremely high level of tolerance to boron (B) toxicity in Puccinellia distans (Jacq.) Parl. but the mechanistic basis is not known. Puccinellia distans was exposed to B concentrations of up to 1000 mg B L−1 and root B uptake, growth parameters, B and N contents, H2O2 accumulation and ·OH-scavenging activity were measured. Antioxidant enzyme activities including superoxide dismutase (SOD), ascorbate peroxidase, catalase, peroxidase and glutathione reductase, and lipid peroxidation products were determined. B appears to be actively excluded from roots. Excess B supply caused structural deformations in roots and leaves, H2O2 accumulation and simultaneous up-regulation of the antioxidative system, which prevented lipid peroxidation even at the highest B concentrations. Thus, P. distans has an efficient root B-exclusion capability and, in addition, B tolerance in shoots is achieved by a well-regulated antioxidant defense system. |
| Databáze: | OpenAIRE |
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