盐胁迫对枸杞属两种植物幼苗离子吸收和分配的影响

草业学报 ›› 2011, Vol. 20 ›› Issue (4): 129-136.

盐胁迫对枸杞属两种植物幼苗离子吸收和分配的影响

王龙强^1,2,米永伟¹,蔺海明^1,2*

1.甘肃农业大学农学院,甘肃兰州 730070;
2.甘肃省干旱生境作物学重点实验室, 甘肃兰州 730070

收稿日期:2010-12-31 出版日期:2011-04-25 发布日期:2011-08-20
通讯作者: E-mail:linhm@gsau.edu.cn
作者简介:王龙强(1980-),男,甘肃永昌人,讲师,在读博士。E-mail:wanglq@gsau.edu.cn
基金资助:
甘肃省自然科学基金项目(1010RJZA203)和中国科协科技导报社博士生创新研究计划项目(kjdb20090102-6)资助。

Effect of salt stress on ion absorption and distribution of two Lycium seedlings

WANG Long-qiang^1,2, MI Yong-wei¹, LIN Hai-ming^1,2

1.College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
2.Gansu Provincial Key Lab of Aridland Crop Science, Lanzhou 730070, China

Received:2010-12-31 Online:2011-04-25 Published:2011-08-20

摘要/Abstract

摘要： 以枸杞属2种植物(黑果枸杞和宁夏枸杞)幼苗为试验材料,采用不同浓度的NaCl溶液进行胁迫,对其不同器官中Na⁺、K⁺、Ca²⁺、Mg²⁺、Si⁴⁺、Cl^-6种离子的吸收与分配情况进行研究。结果表明,在盐胁迫下,黑果枸杞和宁夏枸杞各器官中的Na⁺和Cl^-相对含量均显著高于对照,且随着盐浓度的增加,其含量也逐渐增加,尤以叶片中积累最多;K⁺、Ca²⁺、Mg²⁺、Si⁴⁺在盐处理组各器官中的相对含量比对照降低或无差异。同时,各器官中的K⁺/Na⁺、Ca²⁺/Na⁺、Mg²⁺/Na⁺及Si⁴⁺/Na⁺均随盐浓度增加而呈逐渐下降的趋势。盐处理组中,黑果枸杞各器官中K⁺/Na⁺、Ca²⁺/Na⁺、Mg²⁺/Na⁺和Si⁴⁺/Na⁺离子比值均显著高于同浓度胁迫下的宁夏枸杞,且高盐胁迫下黑果枸杞各离子比值相对于对照下降的幅度远小于宁夏枸杞,说明黑果枸杞比宁夏枸杞有较强的耐盐能力。

Abstract: Na⁺, K⁺, Ca²⁺, Mg²⁺, Si⁴⁺ and Cl^- absorption and distribution in different organs of two Lycium seedlings(Lycium ruthenicum and L. barbarum) were studied under NaCl stress. There were higher Na⁺ and Cl^- relative contents of two seedlings than those of contrast, and its content became gradually higher with salt concentration increasing. Among different organs, accumulation of Na⁺ and Cl^- were the most highest in leaves tissue. On the contrary, K⁺, Ca²⁺, Mg²⁺ and Si⁴⁺ contents of seedlings under different salt tolerance reduced or did not vary compared with contrast. At the same time, the K⁺/Na⁺, Ca²⁺/Na⁺, Mg²⁺/Na⁺ and Si⁴⁺/Na⁺ ratios in leaves, stems and roots decreased gradually with salt concentration increasing under NaCl stress. The K⁺/Na⁺, Ca²⁺/Na⁺, Mg²⁺/Na⁺ and Si⁴⁺/Na⁺ ratios in L. ruthenicum under salt stress were markedly higher than those in L. barbarum, and the descendant degree of these ratios of L. ruthenicum were enormously lower than those of L. barbarum especially in higher salt concentration, which showed that L. ruthenicum had stronger ability than L. barbarum in salt tolerance.

中图分类号:

王龙强,米永伟,蔺海明. 盐胁迫对枸杞属两种植物幼苗离子吸收和分配的影响[J]. 草业学报, 2011, 20(4): 129-136.

WANG Long-qiang, MI Yong-wei, LIN Hai-ming. Effect of salt stress on ion absorption and distribution of two Lycium seedlings[J]. Acta Prataculturae Sinica, 2011, 20(4): 129-136.

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