| 钙对根际低氧胁迫下黄瓜幼苗根系呼吸代谢的影响 |
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| 引用本文： | 胡晓辉,李娟,郭世荣,李璟.钙对根际低氧胁迫下黄瓜幼苗根系呼吸代谢的影响[J].园艺学报,2006,33(5):1113-1116. |
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| 作者姓名： | 胡晓辉 李娟 郭世荣 李璟 |
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| 作者单位： | (南京农业大学园艺学院, 江苏南京, 210095) |
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| 基金项目： | 国家自然科学基金项目(30571263) |
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| 摘 要： | 采用营养液水培, 研究了根际低氧胁迫下Ca2+对两个耐低氧能力不同的黄瓜品种根系呼吸代谢的影响。结果表明: 与耐低氧能力较弱的‘中农8号’相比, 耐低氧能力较强的‘绿霸春4号’根系LDH活性增加幅度较低, 乳酸含量较少, ADH活性增加幅度较大, SDH和IDH活性降低幅度较小。低氧胁迫下, 营养液加钙处理能够提高根系SDH、IDH和ADH活性, 降低LDH活性和乳酸含量; 而低氧缺钙处理表现出相反的结果。这表明, 低氧胁迫下, Ca2+能提高根系乙醇发酵能力, 降低乳酸发酵, 使植物保持有氧呼吸代谢, 从而缓解低氧胁迫对植株的伤害。
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| 关 键 词： | Ca2+ 黄瓜 低氧胁迫 有氧呼吸 无氧呼吸 |
| 文章编号： | 0513-353X（2006）05-1113-04 |
| 收稿时间： | 2005-12-05 |
| 修稿时间： | 2005-12-052006-03-02 |
Effects of Ca2+ on Respiratory Metabolism in Roots of Cucumber Seedlings under Root-zone Hypoxia Stress |
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| Hu Xiaohui,Li Juan,Guo Shirong,Li Jing.Effects of Ca2+ on Respiratory Metabolism in Roots of Cucumber Seedlings under Root-zone Hypoxia Stress[J].Acta Horticulturae Sinica,2006,33(5):1113-1116. |
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| Authors: | Hu Xiaohui Li Juan Guo Shirong Li Jing |
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| Institution: | (College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China) |
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| Abstract: | 12 primers were selected from 100 ISSR primers. 116 DNA fragments were amplified from 57 samples and each primers resulted in 9.67 DNA fragments. 84 fragments were polymorphic ( percentage of polymorphic bands was 71% ). The value of Neips genetic similarity (GS) indexes of 57 cultivars based on the ISSR data varied from 0.51 to 0.98, with an average of 0.84, suggesting that the genetic diversity among cultivars of China Southern Region is short. Cluster analysis with UPGMA method showed that the cultivars tested in this study could be divided into six groups. The results according with the pedigree relations had no connection with regions of cultivars origin. |
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| Keywords: | Ca~ 2 Cucumber Hypoxia stress Aerobic respiration Anaerobic respiration |
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