Hamurcu, MehmetHakki, Erdogan E.Sert, Tijen DemiralOzdemir, CananMinareci, ErsinAvsaroglu, Zuhal Z.Gezgin, Sait2020-03-262020-03-2620160939-50751865-7125https://dx.doi.org/10.1515/znc-2015-0226https://hdl.handle.net/20.500.12395/33603Recent 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 center dot 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.en10.1515/znc-2015-0226info:eu-repo/semantics/closedAccessantioxidant enzymesboron toxicityPuccinelliareactive oxygen speciesroot and leaf anatomyArticle7107.08.202027328527356235Q3WOS:000381931900011Q4