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农学学报

农学学报 ›› 2012, Vol. 2 ›› Issue (7): 55-58.

所属专题： 生物技术； 园艺

• 林学 园艺 园林 食用菌 • 上一篇    下一篇

锌对黄瓜幼苗根系生长及保护酶活性的影响

杜新民   

  • 收稿日期:2011-10-18 修回日期:2012-04-27 出版日期:2012-07-20 发布日期:2012-07-20
  • 基金资助:

    微量元素及其施配对蔬菜生理指标及产量品质影响的研究

Effects of Zinc on Growth and Activities of Protective Enzymes of Cucumber Seedling Roots

  • Received:2011-10-18 Revised:2012-04-27 Online:2012-07-20 Published:2012-07-20

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摘要：

为促进科学合理施用微量元素肥料、培育黄瓜壮苗，进一步提高黄瓜产量和品质，以‘新津春4号’黄瓜为材料，缺锌的1/2 Hoagland营养液为基础，设置4个不同浓度的ZnSO4?7H2O处理(0、0.1、0.2、0.4 mg/L)。通过营养液水培的方法，研究不同锌浓度对黄瓜幼苗根系生长及保护酶活性的影响。结果表明：（1）随着锌浓度的增加，黄瓜幼苗根系的总长度、平均直径、总面积、总体积、根尖数逐渐提高，Zn3(0.4 mg/L)时达到最大。（2）在Zn0(0 mg/L)到Zn2(0.2 mg/L)范围内，随着锌浓度的提高，POD、CAT活性升高，当锌浓度大于Zn2时，POD、CAT活性降低；SOD活性随着锌浓度的增加显著提高；丙二醛(MDA)含量随着锌浓度的增加显著降低。（3）综合考虑的黄瓜生长生理指标，黄瓜幼苗根系生长的最佳ZnSO4?7H2O浓度为0.2 mg/L的1/2 Hoagland营养液。

关键词: 雷竹, 雷竹, 集约经营措施, 冻害指数, 覆盖, 施肥, 立竹

Abstract:

To improve the yield and quality of cucumber, the study dealt with the effects of zinc on growth and activities of protective enzymes of cucumber seedling roots, which cultivated in hydroponic nutrient solution (zinc deficiency 1/2 Hoagland nutrient solution), with different concentrations of ZnSO4?7H2O solution (0, 0.1, 0.2, 0.4 mg/L). The results showed that: (1) With increasing concentrations of zinc, the total length of roots of cucumber seedlings, average diameter, total area, total volume, the number of root tips increased gradually, reached the peak in Zn3 (0.4 mg/L). (2)In the Zn0 (0 mg/L) to Zn2 (0.2 mg/L) range, with the zinc concentration increased, POD, CAT activity increased. When zinc concentrations greater than Zn2, POD, CAT activity decreased; SOD activity increased significantly with increase in zinc concentration; malondialdehyde (MDA) content significantly reduced with increase of zinc. (3)Considering the physiological indicators of root growth of cucumber seedlings, the optimum concentration of ZnSO4?7H2O was: 0.2mg/L of 1/2Hoagland nutrient solution.

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