Biologia Plantarum

, Volume 52, Issue 3, pp 592–596

Effects of silicon on defense of wheat against oxidative stress under drought at different developmental stages

  • H. J. Gong
  • K. M. Chen
  • Z. G. Zhao
  • G. C. Chen
  • W. J. Zhou
Brief Communication

DOI: 10.1007/s10535-008-0118-0

Cite this article as:
Gong, H.J., Chen, K.M., Zhao, Z.G. et al. Biol Plant (2008) 52: 592. doi:10.1007/s10535-008-0118-0

Abstract

The effects of silicon application before sowing on the drought-induced oxidative stress and antioxidant defense in wheat (Triticum aestivum L.) were investigated. Drought stress was applied by withholding watering till sampling at booting or filling stage. Application of Si increased the water potential of drought-stressed plants at filling stage, whereas it did not at booting stage. The superoxide dismutase (SOD) activity was inhibited and peroxidase (POD) activity was enhanced by drought at booting stage, and no differences were observed due to the Si treatment. At filling stage, however, application of Si increased the SOD activity and decreased the POD activity of drought-stressed plants. The catalase (CAT) activity was slightly increased by drought only in the absence of Si and at booting stage. The activity of glutathione reductase (GR) was not greatly influenced. Application of Si did not change the contents of H2O2, total soluble protein and protein carbonyl of drought-stressed plants at booting stage, whereas at filling stage, it decreased the content of H2O2 and protein carbonyl and increased the content of total soluble protein. The content of thiobarbituric acid reactive substances (TBARS) and the activities of acid phospholipase (AP) and lipoxygenase (LOX) in drought-stressed plants were also decreased by application of Si at both stages.

Additional key words

catalase glutathione reductase lipoxygenase peroxidase phospholipase superoxide dismutase Triticum aestivum water stress 

Abbreviations

AP

acid phospholipase

CAT

catalase

GR

glutathione reductase

LOX

lipoxygenase

POD

peroxidase

SOD

superoxide dismutase

TBARS

thiobarbituric acid reactive substances

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • H. J. Gong
    • 1
  • K. M. Chen
    • 1
  • Z. G. Zhao
    • 2
  • G. C. Chen
    • 2
  • W. J. Zhou
    • 1
  1. 1.Institute of Crop Science, College of Agriculture and BiotechnologyZhejiang UniversityHangzhouP.R. China
  2. 2.School of Life SciencesLanzhou UniversityLanzhouP.R. China

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