| 茶苗对No_3~-的吸收动力学及硝酸还原酶活性 |
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| 引用本文： | 苏金为,王湘平.茶苗对No_3~-的吸收动力学及硝酸还原酶活性[J].福建农林大学学报(自然科学版),1993(4). |
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| 作者姓名： | 苏金为 王湘平 |
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| 作者单位： | 福建农学院基础部，福建农学院测试中心 福州350002 |
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| 摘 要： | 3个不同品种茶苗吸收NO~-_3的动力学分析表明:k_m值,毛蟹<本山<大叶乌龙;V_max值,大叶乌龙>毛蟹>本山,茶苗经NO~-_3亏缺的溶液预培养2d后置于不同NO~-_ 3浓度的溶液中培养,结果显示:在一定NO~-_浓度范围内,溶液中NO~-_3含量增大,NO~-_3吸收上运速率提高,叶片中的NO~-_3含量增多,硝酸还原酶活性增强.根部NO~-_3的吸收上运速率调节着硝酸还原酶的诱导及其活性。
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| 关 键 词： | 茶苗 硝酸盐 硝酸还原酶 K_m v_(max) |
Kinetics of NO_3 Uptakes and Nitrate Reductase Activity in Tea Seedling |
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| Su Jinwei,Wang Xiangping Dept of Foundamental Subjects,Test Centre,FAU,Fuzhou.Kinetics of NO_3 Uptakes and Nitrate Reductase Activity in Tea Seedling[J].Journal of Fujian Agricultural and Forestry University,1993(4). |
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| Authors: | Su Jinwei Wang Xiangping Dept of Foundamental Subjects Test Centre FAU Fuzhou |
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| Institution: | Su Jinwei,Wang Xiangping Dept of Foundamental Subjects,Test Centre,FAU,Fuzhou 350002 |
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| Abstract: | The kinetics of nitrate uptakes in 3 tea varieties were studied, k_m was listed as MaoxieMaoxie>Benshan.Seedlings were pretreated with nitrate deficiency for 2 days,and then the NO~-_3 uptake abilities of roots were measured in va- rious nitrate concentration of culture solution.When the concentrations of NO~-_3 were increased within the certain range,there was a marked increase in the rate of nitrate transport to shoots,and both nitrate reductase activities and nitrate contents in leaves were also increased.The rates of nitrate transport to shoot regulate the induction and activities of nitrate reductase. |
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| Keywords: | tea seedling nitrate nitrate reductase k_m v_(max) |
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