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., DEMİRAL SERT T., ÖZDEMİR C., MİNARECİ E., Avsaroglu Z. Z., ...Daha Fazla

Zeitschrift fur Naturforschung - Section C Journal of Biosciences, cilt.71, sa.7-8, ss.273-285, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 71 Sayı: 7-8
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1515/znc-2015-0226
  • Dergi Adı: Zeitschrift fur Naturforschung - Section C Journal of Biosciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.273-285
  • Anahtar Kelimeler: antioxidant enzymes, boron toxicity, Puccinellia, reactive oxygen species, root and leaf anatomy
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

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.