NaCl胁迫下沙枣幼苗的离子代谢特性

杨升; 张华新; 刘涛; 武海雯; 杨秀艳; 倪建伟; 陈秋夏

NaCl胁迫下沙枣幼苗的离子代谢特性

1.
国家林业局盐碱地研究中心, 北京 100091
2.
浙江省亚热带作物研究所, 浙江温州 325005
基金项目:
中央级公益性科研院所基本科研业务费专项资金项目"重要耐盐碱树种多层次遗传改良与种质创新"(CAFYBB2012009)
中图分类号: S793.9

Study on Ion Metabolism Characteristics of Elaeagnus angustifolia Seedlings under NaCl Stress

1.
Research Center of Saline and Alkali Land of State Forestry Administration, Beijing 100091, China
2.
Zhejiang Institute of Subtropical Crops, Wenzhou 325005, Zhejiang, China
CLC number: S793.9

- 沙枣
- / NaCl胁迫
- / 离子代谢
- / 种源
Abstract: [Objective]To further understand the ion metabolism characteristics of Elaeagnus angustifolia L. under NaCl stress.[Method]The seedlings of two E. angustifolia L. provenances, which were Alaer (salt tolerance provenance) and Yinchuan (salt sensitive provenance), were treated by three NaCl concentrations (0,150,300 mmol·L-1) and sampled at the 7th day and the 30th day to measure the Na+ , K+, Ca2+, and Mg2+ contents, K+/Na+ ratio and selective absorption and transportation of K+ in tissues (roots, stems and leaves). [Result]The results showed that the Na+ content in the organizations of E. angustifolia L. sharply increased with the increase of NaCl concentration. With prolonging of stress time, the Na+ content increased in roots, and decreased in stems and leaves. After seedlings of the two provenances were treated with 150 mmol·L-1 NaCl for 7 days, the Na+ content was 2.10 times and 2.23 times in leaves, respectively, compared with the control groups, and was 1.79 times and 1.57 times in root. Meanwhile, the difference between two provenances showed a expanding trend with the increase of NaCl concentration and stress time. With the increase of NaCl concentration and extension of stress time, the K+ content, Ca2+ content and K+/Na+ ratio in organizations decreased gradually. Meanwhile, the Alaer provenance seedlings accumulated more Na+ in roots and less Na+ in leaves than that of Yinchuan provenance, and the K+ content, Ca2+ content and K+/Na+ ratio decreased less in the Alaer provenance seedlings than those of Yinchuan provenance. With the increase of NaCl concentration, the Mg2+ content in leaf gradually decrease, but the Mg2+ content in root increased 22.8~64.4% after salt stress for 7 days, and Alaer provenance seedlings increased more than Yinchuan provenance. After 30 days, there was non-significant difference with the control group on the Mg2+ content of root. K+ selective absorption of E. angustifolia L. seedlings significantly increased with increasing salt concentration of the media at the 7th days, whereas not obvious at the 30th days. When the concentration of NaCl in the media increased, the change of K+ selective transportation was not significant. [Conclusion]E. angustifolia L. seedlings increase Mg2+ content and K+ selective absorption in the roots at the early stage of salt stress to adapt saline environment. The salt-tolerance E. angustifolia L. provenance can cut off more Na+ in roots and reduce Na+ content in leaves, which cause less K+, Ca2+ and Mg2+ contents loss, especially the roots and leaves, so as to ensure that all kinds of metabolisms can go well.
- Elaeagnus angustifolia
- / NaCl stress
- / ion metabolism
- / provenance

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NaCl胁迫下沙枣幼苗的离子代谢特性

Study on Ion Metabolism Characteristics of Elaeagnus angustifolia Seedlings under NaCl Stress

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NaCl胁迫下沙枣幼苗的离子代谢特性

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Study on Ion Metabolism Characteristics of Elaeagnus angustifolia Seedlings under NaCl Stress

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NaCl胁迫下沙枣幼苗的离子代谢特性

Study on Ion Metabolism Characteristics of Elaeagnus angustifolia Seedlings under NaCl Stress

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NaCl胁迫下沙枣幼苗的离子代谢特性

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Study on Ion Metabolism Characteristics of Elaeagnus angustifolia Seedlings under NaCl Stress

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