| 铜胁迫对小白菜幼苗生长的影响 |
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| 引用本文： | 韩志平,张海霞,赵智灵,杜清洁.铜胁迫对小白菜幼苗生长的影响[J].长江蔬菜,2015(12):28-32. |
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| 作者姓名： | 韩志平 张海霞 赵智灵 杜清洁 |
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| 作者单位： | 1. 大同大学生命科学学院/高寒区作物研究所，山西，037009;2. 大同大学后勤管理处 |
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| 基金项目： | 大同市农业科技攻关项目(201468-2)；大同大学博士科研资助项目(2008-B-28)；大同大学研究所科研资助项目 |
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| 摘 要： | 以北京新一号四季小白菜为材料，研究了 CuSO4胁迫对基质栽培小白菜幼苗生长、光合色素含量和膜脂过氧化的影响。试验结果表明，较低浓度 CuSO4使株高、叶片数、最大叶长、最大叶宽、根长及地上部、根系鲜质量和干质量显著增加，较高浓度 CuSO4则显著抑制了各形态指标和生物量积累；20μmol/L CuSO4使叶绿素 a、叶绿素 b 和类胡萝卜素含量显著增加，较高浓度 CuSO4则使各光合色素含量显著降低；随 CuSO4浓度提高，叶片质膜透性显著增加，抗坏血酸含量则呈先升高后降低的趋势。说明低浓度 CuSO4处理对小白菜生长有一定的促进作用，高浓度CuSO4胁迫则使光合能力降低，膜脂过氧化程度加剧，最终造成小白菜生长受到显著抑制。
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| 关 键 词： | 小白菜 铜胁迫 生长 光合色素 质膜透性 |
Effects of Copper Stress on Seedling Growth of Brassica campestris ssp. chinenses (L.) Makino |
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| HAN Zhiping,ZHANG Haixia,ZHAO Zhiling,DU Qingjie.Effects of Copper Stress on Seedling Growth of Brassica campestris ssp. chinenses (L.) Makino[J].Journal of Changjiang Vegetables,2015(12):28-32. |
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| Authors: | HAN Zhiping ZHANG Haixia ZHAO Zhiling DU Qingjie |
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| Abstract: | Taking Beijing New No.1 as material, the experiment studied the effects of CuSO4 stress on the growth, photosynthetic pigment contents and membrane lipid peroxidation of Brassica campestris ssp. chinenses (L.) Makino cultivated in mixed substrate. The results showed that, the plant height, leaf number, maximum leaf length, maximum leaf width, root length and shoot and root fresh weight and dry weight of B. campestris ssp. chinenses (L.) Makino were significantly increased under lower CuSO4 concentration treatments, while all morphological indicators and biomass accumulation were significantly inhibited under higher CuSO4 concentration treatments. The chlorophyll a, chlorophyll b and carotenoid contents were significantly increased when the CuSO4 concentration was 20 μmol/L, while all photosynthetic pigment contents were significantly reduced under higher CuSO4 concentration treatments. with CuSO4 concentration increased, membrane permeability of leaves was significantly increased, and ascorbic acid content was increased firstly and then decreased. The results indicated that lower CuSO4 concentrations could promote the growth of campestris ssp. chinenses (L.) Makino, while higher CuSO4 concentrations reduced photosynthetic capacity and exacerbated peroxidationof plasma membrane, ultimately significantly inhibited the growth of B. campestris ssp. chinenses (L.) Makino. |
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| Keywords: | Brassica campestris ssp chinenses (L ) Makino Copper stress Growth Photosynthetic pigments Plasma membrane permeability |
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