关键词: 黄瓜, 光质, 抗氧化酶, 衰老

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