| 三种苹果属植物幼苗拒Na2+机理的研究 |
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| 引用本文： | 杨洪兵,韩振海,许雪峰.三种苹果属植物幼苗拒Na2+机理的研究[J].园艺学报,2004,31(2):143-148. |
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| 作者姓名： | 杨洪兵 韩振海 许雪峰 |
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| 作者单位： | (中国农业大学果树逆境生理与分子生物学实验室，北京100094) |
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| 基金项目： | 国家自然科学基金资助项目(39740027) |
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| 摘 要： | 以苹果属耐盐性不同的山定子、小金海棠和珠眉海棠的幼苗为试材，通过拒Na2+ 能力的测定确定了盐敏感种的整体拒Na2+ 能力为65%左右，中等耐盐种的整体拒Na2+ 能力为80%左右，耐盐种的整体拒Na 能力为90%左右，根部和茎基部的拒Na 能力是苹果属植物幼苗整体拒Na2+ 能力的主要部分，耐盐种根部和茎基部的拒Na2+ 能力明显大于盐敏感种。耐盐种侧根、茎基木质部和老叶的Na2+累积效应明显，是主要的聚Na2+ 部位。耐盐种通过地上部Na2+ 的重新分配和再转运，使幼叶和成熟叶Na2+ 含量更低。
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| 关 键 词： | 苹果属 抗盐性钠离子 盐分胁迫 NaCl处理 拒Na2+ 能力 |
| 文章编号： | 0513-353X(2004)02-0143-06 |
| 收稿时间： | 2003-9-15 |
| 修稿时间： | 2003-11-6 |
Studies on Na+ Exclusion Mechanism of Three Malus Seedlings |
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| Yang Hongbing,Han Zhenhai,and Xu Xuefeng.Studies on Na+ Exclusion Mechanism of Three Malus Seedlings[J].Acta Horticulturae Sinica,2004,31(2):143-148. |
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| Authors: | Yang Hongbing Han Zhenhai and Xu Xuefeng |
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| Institution: | (Fruit Stress Physiology and Molecular Biology Lab，China Agricultural Univerity，Beijing 100094，China ) |
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| Abstract: | Using seedlings of Malus baccata, M. xiaojinensis and M. zumi as the experimental materials. Na exclusion capability was determined to affirm the whole Na exclusion capability, and the whole Na exclusion capability of salt-sensitive species was about 65 % , middle salt-tolerant species about 80 % , salt-tolerant species about 90 %. Na exclusion capability of roots and stem base was the main parts of the whole Na exclusion capability in Malus seedlings. Na exclusion capability in roots and stem base of salt-tolerant species was obviously higher than that of salt-sensitive species. Lateral roots, stem base xylem and old leaves of salt-tolerant cultivar obviously occured Na accumulative effect, and were main Na accumulative localizations. Through shoot Na re-distribution and re-transportation, Na content became even less in young leaves and mature leaves of salt-tolerant species. |
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| Keywords: | Mains Salt resistance Sodium ion Salt stress NaCl treatment Na exclusion capability |
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