Biologia Plantarum

, Volume 50, Issue 4, pp 775–778 | Cite as

Nitric oxide treatment alleviates drought stress in wheat seedlings

  • X. Tian
  • Y. LeiEmail author
Brief Communication


The effects of sodium nitroprusside (SNP; nitric oxide donor) treatment on drought stress induced by PEG for different periods of time in wheat seedlings were investigated. Our results suggested that treatment for 2, 4 and 6 d with 15 % PEG could be termed as mild, moderate and severe stress, respectively. Drought stress induced accumulation of hydrogen peroxide and resulted in lipid peroxidation. On the other hand, activities of SOD, CAT and PAL increased under mild stress to counteract the oxidative injury and then decreased when the stress became severe (6 d). As the effect of SNP treatment, 0.2 mM enhanced wheat seedlings growth and kept high relative water content and alleviated the oxidative damage. However, 2 mM SNP aggravated the stress as a result of uncontrolled generation of reactive oxygen species and ineffectiveness of antioxidant systems.

Additional key words

ascorbate peroxidase catalase guaiacol peroxidase L-phenylalanine ammonia lyase reactive oxygen species superoxide dismutase Triticum aeslivum 



ascorbic acid


ascorbate peroxidase




ethylene diamine tetraacetic acid


guaiacol peroxidase


hydrogen peroxide


L-phenylalanine ammonia lyase


reactive oxygen species


relative water content


sodium nitroprusside


superoxide dimutase


thiobarburic acid reacting substance


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Copyright information

© Institute of Experimental Botany, ASCR, Praha 2006

Authors and Affiliations

  1. 1.School of Biological Resources and Environmental SciencesJishou UniversityHunanP.R. China
  2. 2.Chengdu Institute of BiologyChinese Academy of SciencesChengduP.R. China

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