Extremely high boron tolerance in Puccinellia distans (Jacq.) Parl. related to root boron exclusion and a well-regulated antioxidant system

Hamurcu M., Hakki E. E., Sert T., Ozdemir C., Minareci E., Avsaroglu Z. Z., ...More

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION C-A JOURNAL OF BIOSCIENCES, vol.71, no.7-8, pp.273-285, 2016 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 71 Issue: 7-8
  • Publication Date: 2016
  • Doi Number: 10.1515/znc-2015-0226
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.273-285
  • Keywords: antioxidant enzymes, boron toxicity, Puccinellia, reactive oxygen species, root and leaf anatomy, OXIDATIVE STRESS, GYPSOPHILA-ARROSTIL, TOXICITY TOLERANCE, PLANTS, BARLEY, WHEAT, SOIL, MECHANISMS, RESPONSES, CHLOROPLASTS
  • Süleyman Demirel University Affiliated: No


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 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.