Effect of UV-B Radiation on the Growth and Photosynthesis of Cucumber (Cucumis sativus L.) Seedlings

doi:10.3321/j.issn:1000-7091.2006.06.020

Abstract

Abstract: The effect of enhanced UV_B radiation on the growth and photosynthesis of cucumber (Cucumis sativus L.) seedlings was studied.The results showed that the seedling height was significantly inhibited by the UV_B radiation.The root growth and root activity of cucumber seedlings,the chlorophyll synthesis and photosynthesis were promoted by the UV_B radiation at low dosage.But high dosage of UV_B radiation inhibited the roots activity,and caused great damage of chlorophyll and decrease in photosynthetic rate (Pn).The content of SOD and POD of seedlings was higher than that of the control at low dosage of UV_B radiation.However,the content of seedling SOD was lower than that of the control but the content of seedling POD was higher than that of the control at high dosage of UV_B radiation.It suggested that the strong seedlings were facilitated by low dosage UV_B radiation.

Key words: UV_B radiation, Cucumber seedlings, Chlorophyll, Root activity, Photosynthesis

CLC Number:

S663.4

SUN Ling-qiang, LI Zhao-hu, DUAN Liu-sheng, WEI Zhi-gang, WANG Qian. Effect of UV-B Radiation on the Growth and Photosynthesis of Cucumber (Cucumis sativus L.) Seedlings[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(6): 79-82. doi: 10.3321/j.issn:1000-7091.2006.06.020.

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