Scientia Agricultura Sinica ›› 2010, Vol. 43 ›› Issue (3): 529-534 .doi: 10.3864/j.issn.0578-1752.2010.03.012

• HORTICULTURE • Previous Articles     Next Articles

Effects of Light Quality on Leaf Senescence and Activities of Antioxidant Enzymes in Cucumber Plants

WANG Hong, JIANG Yu-ping, SHI Kai, ZHOU Yan-hong, YU Jing-quan
   

  1. （浙江大学园艺系）
  • Received:2009-05-04 Revised:2009-07-16 Online:2010-02-10 Published:2010-02-10
  • Contact: YU Jing-quan

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Abstract:

【Objective】 To investigate the mechanism involved in the different responses of leaf senescence to light qualities, cucumber (Cucumis sativus L.) seedlings were exposed to white (W), purple (P), blue (B), green (G), yellow (Y), and red (R) lights for 15 d. 【Method】 The contents of chlorophyll, soluble proteins and MDA together with the expression and activities of antioxidant enzymes were measured 【Result】 P and B increased the transcript levels and activities of antioxidant enzymes, the contents of chlorophyll, soluble proteins and MDA. In contrast, G, Y and R decreased the activities of antioxidant enzymes, the contents of chlorophyll, soluble proteins and MDA. 【Conclusion】 These results indicate that P and B prevented senescence by maintaining high levels of antioxidant enzymes.

Key words: Cucumis sativus L, light quality, antioxidant enzymes, senescence

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