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Molybdenum improves antioxidant and osmotic-adjustment ability against salt stress in Chinese cabbage (Brassica campestris L. ssp. Pekinensis)

Plant and Soil, ISSN: 0032-079X, Vol: 355, Issue: 1-2, Page: 375-383
2012
  • 69
    Citations
  • 0
    Usage
  • 36
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    69
    • Citation Indexes
      69
  • Captures
    36

Article Description

Aims: A pot experiment was conducted to determine the effects of molybdenum on antioxidative defense and osmotic-adjustment systems of Chinese cabbage under salt stress. Methods: Molybdenum fertilizer was applied at three levels (0, 0. 15, 0. 3 mg kg ). Ten days after sowing, 500 ml 136. 8 mM of NaCl solution was added to half of the plants for each treatment every 10th day for three consecutive times. Results: The results revealed that with the application of molybdenum in Chinese cabbage under salt stress the fresh weight significantly increased; activities of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were dramatically improved; the contents of non-enzymatic antioxidants such as glutathione (GSH), carotenoid (CAR) and ascorbic acid (ASA) were significantly increased. There was also an significant increase in low molecular osmotic-adjustment products such as soluble sugar, soluble protein and proline. Moreover, molybdenum significantly increased potassium ion (K ) content and reduced sodium ion (Na ) contents, which eventually improved the K /Na ratios. Conclusions: The present study suggests that the application of molybdenum enhances the salt stress tolerance in Chinese cabbage by increasing the capacity to eliminate active oxygen and the ability of osmotic-adjustment. © 2011 Springer Science+Business Media B.V.

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