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Hydrogen peroxide acts as a signal molecule in CO2 laser pretreatment-induced osmotic tolerance in wheat seedling

Author

Listed:
  • Z.B. Qiu

    (College of Life Science, Henan Normal University, P.R. China)

  • Q. Li

    (College of Life Science, Northwest University, Xi'an, P.R. China)

  • Z.Z. Bi

    (College of Life Science, Henan Normal University, P.R. China)

  • M. Yue

    (College of Life Science, Northwest University, Xi'an, P.R. China)

Abstract

The objective of this study was to test whether hydrogen peroxide (H2O2) is involved in laser pretreatment-induced water tolerance in wheat seedlings due to its nature as a second messenger in stress responses. The results showed that 3 min laser pretreatment could enhance water tolerance in wheat seedlings by decreasing the concentration of malondialdehyde (MDA), the production rate of superoxide radical (O2-), and increasing the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX) and glutathione reductase (GR) and the concentration of glutathione (GSH), and having a positive physiological effect on the growth of osmotic stress seedlings. But the promotive effect of laser pretreatment-induced water tolerance in wheat seedling was effectively reversed by addition of 2 mmol AsA (ascorbic acid) or 5 µmol DPI (diphenyle iodonium), but exogenous 100 U/mL CAT could not reversed laser pretreatment-induced protective effect on wheat seedlings under osmotic stress. The results suggest that H2O2 metabolism was involved as signal in the processes of laser-induced water acclimation and laser-induced protective effect was shown to be likely related to NADPH oxidase-dependent H2O2 production.

Suggested Citation

  • Z.B. Qiu & Q. Li & Z.Z. Bi & M. Yue, 2011. "Hydrogen peroxide acts as a signal molecule in CO2 laser pretreatment-induced osmotic tolerance in wheat seedling," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(9), pages 403-408.
    • Handle: RePEc:caa:jnlpse:v:57:y:2011:i:9:id:271-2010-pse
    DOI: 10.17221/271/2010-PSE
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    References listed on IDEAS

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    1. S.A. Anjum & M. Farooq & L.C. Wang & L.L. Xue & S.G. Wang & L. Wang & S. Zhang & M. Chen, 2011. "Gas exchange and chlorophyll synthesis of maize cultivars are enhanced by exogenously-applied glycinebetaine under drought conditions," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(7), pages 326-331.
    2. Julia Foreman & Vadim Demidchik & John H. F. Bothwell & Panagiota Mylona & Henk Miedema & Miguel Angel Torres & Paul Linstead & Silvia Costa & Colin Brownlee & Jonathan D. G. Jones & Julia M. Davies &, 2003. "Reactive oxygen species produced by NADPH oxidase regulate plant cell growth," Nature, Nature, vol. 422(6930), pages 442-446, March.
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    Cited by:

    1. G.Q. Wu & L.N. Zhang & Y.Y. Wang, 2012. "Response of growth and antioxidant enzymes to osmotic stress in two different wheat (Triticum aestivum L.) cultivars seedlings," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 58(12), pages 534-539.

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