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Acta Agron Sin ›› 2008, Vol. 34 ›› Issue (10): 1849-1853.doi: 10.3724/SP.J.1006.2008.01849

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Effects of Exogenous Nitric Oxide Donor SNP on Contents of Chlorophyll and Free Proline, Activity of Antioxidative Enzyme in Rice Seedlings under NaCl Stress

XIAO Qiang12,CHEN Juan2,WU Fei-Hua2,ZHENG Hai-Lei2*   

  1. 1 Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei Institutes for Nationalities, Enshi 445000, Hubei; 2 School of Life Sciences, Xiamen University, Xiamen 361005, Fujian, China
  • Received:2007-11-01 Revised:1900-01-01 Online:2008-10-12 Published:2008-10-12
  • Contact: ZHENG Hai-Lei

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Abstract: In this study, the contents of chlorophyll, free proline and the activities of GPX, SOD, CAT, and the producing rate of superoxide radicals in rice seedlings treated with a varying concentration of SNP under 100 mmol L-1 NaCl stress were investigated. The results showed that the contents of chlorophyll and free proline increased by treatment with low SNP concentration under salt stress. SNP alleviated significantly the oxidative damage caused by salt stress in leaf and root of rice seedlings. Different enzyme activities were regulated by SNP between leaf and root in rice seedlings under salt stress, SNP alleviated significantly the oxida-tive damage via promoting SOD and CAT activities in rice leaf, whereas, via regulating GPX activity mainly besides promoting SOD and CAT activities in root.

Key words: Oryza sativa, Salt stress, Nitric oxide

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