《植物生理学报》 2014, 50(11): 1645-1650

茄子砧木Na⁺、K⁺含量、S_{K, Na运输}与耐盐性关系研究

白丽萍¹, 何雨², 宋宇¹, 周宝利³, 孟思纹¹, 马明南¹, 郭志富^1,*

¹沈阳农业大学生物科学技术学院, 沈阳110161; ²沈阳浑南区组织部, 沈阳110179; ³沈阳农业大学园艺学院, 沈阳110161

通信作者：郭志富；E-mail: zhifuguo@hotmail.com；Tel: 024-88487164

摘　要：

为考察不同茄子砧木在茄子耐盐性的作用, 以茄子嫁接生产中常用的托鲁巴姆(Solanum torvum)、赤茄(Solanum integgrifolium)、刺茄(Solanum texanum)和刚果茄(Solanum sisymbriiflium)为试材, 研究了盐害指数、根系和地上部Na⁺、K⁺含量、Na⁺/K⁺比、S_{K, Na运输}及其与耐盐性的关系。结果表明, 各种砧木的盐害指数均随着盐浓度的增大呈上升趋势, 同一盐浓度下, 盐害指数由大到小依次为刚果茄>赤茄>刺茄>托鲁巴姆。根系Na⁺含量、地上部K⁺含量、根系Na⁺/K⁺比及S_{K, Na运输}在各盐浓度下均表现为托鲁巴姆>刺茄>赤茄>刚果茄。地上部Na⁺含量、根中K⁺含量及地上部Na⁺/K⁺比在各盐浓度下均表现为托鲁巴姆<刺茄<赤茄<刚果茄。茄子砧木耐盐性与根中Na⁺含量、根中Na⁺/K⁺比、S_{K, Na运输}呈正相关, 与地上部Na⁺含量、根中K⁺含量、地上部Na⁺/K⁺比呈负相关。这些结果表明, NaCl处理下耐盐性强的砧木通过限制Na⁺向叶片中运输, 增加了叶片中K⁺含量, 从而降低Na⁺/ K⁺比来提高植株耐盐性。

关键词：NaCl胁迫; 茄子砧木; Na⁺/K⁺比; S_{K, Na运输}; 耐盐性

收稿：2014-06-03   修定：2014-10-21

资助：国家自然基金(31171950)、辽宁省教育厅(L2012231)和高等学校博士学科点专项科研基金(20132103120003)。

Study on Relationship between Na⁺、K⁺ Content and S_{K, Na of transport} of Eggplant Rootstocks and Salt-Tolerance

BAI Li-Ping¹, HE Yu², SONG Yu¹, ZHOU Bao-Li³, MENG Si-Wen¹, MA Ming-Nan¹, GUO Zhi-Fu^1,*

¹College of Biological Science & Biotechnology, Shenyang Agricultural University, Shenyang 110161, China; ²Department of Organization, Hunnan District of Shenyang, Shenyang 110179, China; ³College of Horticulture, Shenyang Agricultural University, Shenyang 110161, China

Corresponding author: GUO Zhi-Fu; E-mail: zhifuguo@hotmail.com; Tel: 024-88487164

Abstract:

To investigate the salt tolerance of different rootstocks of eggplant, Solanum torvum, Solanum integgriflium, Solanum texanum and Solanum sisymbriiflium were chosen for testing the relationships of salt tolerance with salt injury index, Na⁺ and K⁺ contents, Na⁺/K⁺ ratio and the S_{K, Na of transport} in root and shoot. The results showed that the salt injury index of different rootstocks increased with the increasing salt concentration, in the order of Solanum sisymbriiflium>Solanum integgrifolium>Solanum texanum>Solanum torvum at the same salt concentration. Shoot K⁺ content, root Na⁺ content, Na⁺/K⁺ ratio and S_{K, Na of transport} were in the order of Solanum torvum>Solanum texanum>Solanum integgrifolium>Solanum sisymbriiflium at each corresponding salt concentration; shoot Na⁺ content, Na⁺/K⁺ ratio, and root K⁺ content were in the order of Solanum torvum<Solanum texanum<Solarium integgrifolium<Solanum sisymbriiflium at each corresponding salt concentration. A positive correlation was observed between salt-tolerance of eggplant rootstocks and root Na⁺ content, Na⁺/K⁺ ratio and S_{K, Na of transport}; while a negative correlation was observed between the salt-tolerance of eggplant rootstocks and leaf Na⁺ content, Na⁺/K⁺ ratio and root K⁺ content. The results indicated that the rootstock with high salt tolerance increased its plant resistance to salt by restricting Na+ translocation to leaf, increasing K⁺ content in shoot, and decreasing Na⁺/ K⁺ ratio under the salt stress.

Key words: NaCl stress; eggplant rootstock; Na⁺/K⁺ ratio; S_{K, Na of transport}; salt tolerance