| UV-B辐射对黄瓜幼苗生长和光合作用的影响 |
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| 引用本文： | 孙令强,李召虎,段留生,魏志刚,王倩.UV-B辐射对黄瓜幼苗生长和光合作用的影响[J].华北农学报,2006,21(6):79-82. |
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| 作者姓名： | 孙令强 李召虎 段留生 魏志刚 王倩 |
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| 作者单位： | 1. 青岛市种子站,山东,青岛,266108
2. 中国农业大学,农学与生物技术学院,北京,100094 |
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| 摘 要： | 以黄瓜(Cucumis sativusL.)幼苗为材料,研究UV_B辐射对黄瓜幼苗生长和光合作用的影响。结果表明:UV_B辐射对黄瓜幼苗株高的抑制作用非常明显。低剂量UV_B辐射明显促进黄瓜幼苗根的生长,促进黄瓜幼苗根系活力,有利于黄瓜叶绿素的形成。但是高剂量的UV_B辐射抑制黄瓜幼苗根系活力,对黄瓜叶绿素的破坏严重并导致黄瓜幼苗光合速率下降。低剂量UV_B处理黄瓜幼苗的SOD和POD含量均显著高于对照,而高剂量UV_B处理黄瓜幼苗的SOD含量均明显低于对照,但其POD含量却显著高于对照。说明适当增加少量UV_B辐射对培育黄瓜壮苗有利。
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| 关 键 词： | UV-B辐射 黄瓜幼苗 叶绿素 根系活力 光合作用 |
| 文章编号： | 1000-7091（2006）06-0079-04 |
| 收稿时间： | 2006-09-20 |
| 修稿时间： | 2006-09-20 |
Effect of UV-B Radiation on the Growth and Photosynthesis of Cucumber (Cucumis sativus L.) Seedlings |
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| 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. |
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| Authors: | SUN Ling-qiang LI Zhao-hu DUAN Liu-sheng WEI Zhi-gang WANG Qian |
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| Institution: | 1. Qingdao Seed Station, Qingdao 266108, China; 2. College of Agronomy and Biotechnology, China Agriculture University, Beijing 100094, China |
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| 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. |
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| Keywords: | UV-B radiation Cucumber seedlings Chlorophyll Root activity Photosynthesis |
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