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林业科学 ›› 2013, Vol. 49 ›› Issue (9): 165-171.

• 研究简报 • 上一篇    下一篇

NaCl胁迫对唐古特白刺幼苗生长及离子吸收、运输与分配的影响

杨秀艳1,2, 张华新1,2, 张丽3, 刘正祥1,2, 杨升1,2, 武香1,2   

  1. 1. 林木遗传育种国家重点实验室 北京 100091;
    2. 国家林业局盐碱地研究中心 北京 100091;
    3. 内蒙古赤峰市林业科学研究院 赤峰 024006
  • 收稿日期:2013-04-07 修回日期:2013-07-09 出版日期:2013-09-25 发布日期:2013-09-19
  • 通讯作者: 张华新
  • 基金资助:

    中央公益科研院所基本科研业务费专项资金项目(CAFYBB2011005-5)和国家"十二五"科技支撑计划项目(2011BAD38B0102)。

Effects of NaCl Stress on Growth and Absorption, Transportation and Distribution of Ions in Nitraria tangutorum

Yang Xiuyan1,2, Zhang Huaxin1,2, Zhang Li3, Liu Zhengxiang1,2, Yang Sheng1,2, Wu Xiang1,2   

  1. 1. State Key Laboratory of Tree Genetics and Breeding Beijing 100091;
    2. Research Center of Saline and Alkali Land of State Forestry Administration Beijing 100091;
    3. Chifeng Academy of Forestry Chifeng 024006
  • Received:2013-04-07 Revised:2013-07-09 Online:2013-09-25 Published:2013-09-19

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851

关键词: 盐胁迫, 盐生植物, 唐古特白刺, 生长特性, 离子平衡

Abstract:

The effects of different concentrations (0,100,200,300 and 400 mmol·L-1) of NaCl on two-year-old seedlings of halophytic plant Nitraria tangutorum were investigated in a pot experiment. In this study, plant growth, ions (Na+,Cl-,K+ and Ca2+) uptake, transportation and distribution in roots, stems and leaves of N. tangutorum were measured. The results showed that 1) the plant growth, including such as relative height growth and individual biomass accumulation, of this species was enhanced by 100 mmol·L-1 NaCl treatment compared with that of the no salt control. With the increase of NaCl concentration from 200 to 400 mmol·L-1, the relative height growth and individual biomass accumulation of N. tangutorum presented a decreasing tendency, indicating that the growth was inhibited. 2) The uptake and accumulation of Na+ and Cl- in roots, stems and leaves tended to increase with the aggravation of NaCl stress. The contents of Na+ and Cl- were both in an order of leaves > stems > roots. 3) The stressed N. tangutorum enhanced the K+ uptake and decreased the Ca2+ uptake with the increasing accumulation of Na+ and Cl- in roots. The ability of Ca2+ transportation from roots to shoot was enhanced, and there was no significant change in the ability of K+ transportation under the salt salinity. The abilities of ion selective absorption-transportation of N. tangutorum were important for maintaining ion homeostasis and natural physiological processes in leaves under the situations of salt stress. The results suggested that halophytic N. tangutorum could enhance its adaption abilities under salt stress, which is presumably derived from its maintenance of ion homeostasis in cell by selectivity of uptake, transportation and distribution of ions.

Key words: salt stress, halophytic plant, Nitraria tangutorum, growth, ion homeostasis

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