| NaCl胁迫下珠眉海棠苹果中Na~+的组织细胞定位研究 |
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| 引用本文： | 查仁明,许雪峰,韩振海.NaCl胁迫下珠眉海棠苹果中Na~+的组织细胞定位研究[J].核农学报,2001,15(4):224-228. |
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| 作者姓名： | 查仁明 许雪峰 韩振海 |
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| 作者单位： | 中国农业大学园艺学院园艺植物研究所 |
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| 基金项目： | 本试验受国家自然科学基金项目(编号:39740027)及"果树逆境生理研究实验室”的资助. |
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| 摘 要： | 本试验研究了水培条件下NaCl胁迫下珠眉海棠苹果组织细胞中Na+的分布及可能的耐盐机制。结果表明 :在一定NaCl胁迫浓度范围内 ,根系中Na+浓度高于地上部 ,根系对Na+有一定的再吸收作用 ,这是珠眉海棠耐盐的重要机制 ;当NaCl胁迫浓度达到一定阀值后 ,根、叶细胞Na+大量积累 ,当细胞液泡不再接纳Na+时 ,Na+大量积累于胞质和质外体 ,使质外体渗透势大大降低 ,胞质水分外流 ,破坏细胞膜系统和胞质新陈代谢 ,造成伤害。
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| 关 键 词： | NaCl胁迫 珠眉海棠 Na~+定位 再吸收作用 |
| 文章编号： | 1000-8551(2001)04-0224-05 |
| 收稿时间： | 2009-12-31 |
| 修稿时间： | 2001年3月15日 |
LOCALIZATION OF Na~+ IN THISSUES OF Malus zumi UNDER NaCl STRESS |
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| Abstract: | Solution culture was used in this experiment to observe Na\++ localization in epidermis cells of M.zumi under NaCl stress.The results showed that at a certain NaCl range,Na\++ concentrations in root were higher than that in the above\|ground parts,indicating that the roots had a re\|absorption effect on Na\++,and this is probably one of salt tolerance mechanisms of M.zumi. When NaCl concentration being much higher a great accummulation of Na\++ in root or leaves was observed,indicating that the plant had been damaged by NaCl due to massive Na\++ accummulation in cytoplasm and apprent free space. |
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| Keywords: | NaCl stress Malus zumi " target="_blank">+ localization zz')" href="#"> Na + localization re2absorption effect |
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