| H2O2 和Ca2+ 对受低温胁迫香蕉幼苗抗冷性的影响 |
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| 引用本文： | 康国章,陶均,孙谷畴,王正询.H2O2 和Ca2+ 对受低温胁迫香蕉幼苗抗冷性的影响[J].园艺学报,2002,29(2):119-122. |
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| 作者姓名： | 康国章 陶均 孙谷畴 王正询 |
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| 作者单位： | ( 中国科学院华南植物研究所, 广州510650 ; 广州大学生物系, 广州510405) |
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| 基金项目： | 广州市重点资助项目 ( 1999 11) |
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| 摘 要： | 研究表明, 香蕉幼苗喷施H2O2 或CaCl2 或二者结合使用, 能提高其POD 活性, 降低膜渗漏率, 增加可溶性糖含量及减缓叶绿素降解, 从而提高抗寒力, 二者结合表现出协同效应。H2O2 对提高POD活性, 降低膜渗漏率和减缓Chl. b 降解的效果优于CaCl2 ; CaCl2 则在提高可溶性糖含量和减少Chl. a 降解方面占优。相关性分析表明, POD 活性与膜渗漏率的负相关性达到显著水平, 高POD 活性有利于减少低温下膜渗漏。
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| 关 键 词： | H2O2 CaCl2 POD 活性 膜渗漏率 可溶性糖 叶绿素(Chl. ) |
| 文章编号： | 0513-353X(2002)02-0119-04 |
| 修稿时间： | 2001年8月8日 |
Physiological Effects of H2O2 and Ca2+ on Cold-stressed Banana Seedlings |
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| Kang Guozhang ,Tao Jun ,Sun Guchou ,and Wang Zhengxun.Physiological Effects of H2O2 and Ca2+ on Cold-stressed Banana Seedlings[J].Acta Horticulturae Sinica,2002,29(2):119-122. |
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| Authors: | Kang Guozhang Tao Jun Sun Guchou and Wang Zhengxun |
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| Institution: | ( South China Institute of Botany , The Chinese Academy of Sciences , Guangzhou 510650 , China ; Department of Biology , Guangzhou University , Guangzhou 510405 , China) |
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| Abstract: | The banana (Musa acuminata AAA group) seedlings were sprayed with single or mixed H2O2 and CaCl2 and exposed to 7 ℃low temperature for 24 h. The increase of POD activities and soluble sugar contents and alleviation of cell membranes leakage and chlorophylls decomposition in banana seedling leaves were observed during cold stress and recovery periods. The mixed H2O2 and CaCl2 had a synergism on these aspects. The results also showed that H2O2 had better effects in increasing peroxidase activities and Chl . b contents than those of CaCl2 , but CaCl2 had advantage effects on soluble sugar and Chl . a contents. POD activies had a significant opposite realation with electric leakage and it may suggest that increasing POD activities could help to decrease the leakage of cell membranes during low temperature period. |
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| Keywords: | H_2O_2 CaCl_2 Peroxidase activities Membrane leakage Soluble sugar Chlorophylls |
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