| Autor: |
Hamurcu, Mehmet, Hakki, Erdogan E., Demiral Sert, Tijen, Özdemir, Canan, Minareci, Ersin, Avsaroglu, Zuhal Z., Gezgin, Sait, Ali Kayis, Seyit, Bell, Richard W. |
| Zdroj: |
Zeitschrift für Naturforschung C; July 2016, Vol. 71 Issue: 7-8 p273-285, 13p |
| Abstrakt: |
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 distanswas exposed to B concentrations of up to 1000 mg B L−1and root B uptake, growth parameters, B and N contents, H2O2accumulation 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, H2O2accumulation and simultaneous up-regulation of the antioxidative system, which prevented lipid peroxidation even at the highest B concentrations. Thus, P. distanshas an efficient root B-exclusion capability and, in addition, B tolerance in shoots is achieved by a well-regulated antioxidant defense system. |
| Databáze: |
Supplemental Index |
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