园艺学报 ›› 2004, Vol. 31 ›› Issue (2): 143-148.

• 研究论文 •    下一篇



  1. (中国农业大学果树逆境生理与分子生物学实验室,北京100094)
  • 收稿日期:2003-09-15 修回日期:2003-11-06 出版日期:2004-04-25 发布日期:2004-04-25
  • 通讯作者: 许雪峰

Studies on Na2+ Exclusion Mechanism of Three Malus Seedlings

Yang Hongbing;Han Zhenhai;Xu Xuefen   

  1. (Fruit Stress Physiology and Molecular Biology Lab,China Agricultural Univerity,Beijing 100094,China )
  • Received:2003-09-15 Revised:2003-11-06 Online:2004-04-25 Published:2004-04-25
  • Contact: Xu Xuefeng

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。

关键词: 苹果属, 抗盐性钠离子, 盐分胁迫, NaCl处理, 拒Na2+ 能力

Abstract: Using seedlings of Malus baccata, M.xiaojinensis and M.zumi as the experimental materials. Na2+ exclusion capability was determined to affirm the whole Na2+ exclusion capability, and the whole Na2+ exclusion capability of salt-sensitive species was about 65%, middle salt-tolerant species about 8O%, salt-tolerant species about 90%. Na2+ exclusion capability of roots and stem base was the main parts of the whole Na2+ exclusion capability in Malus seedlings. Na2+ exclusion capab ility 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 cuhivar obviously occured Na2+ accumulative effect, and were main Na2+ accumulative localizations. Through shoot Na2+ re-distribution and re-transportation. Na2+ content became even less in young leaves an d mature leaves of salt-tolerant species

Key words: Malus, Salt resistance, Sodiumion, Salt stress, NaCl treatment, Na2+ exclusion capability