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当前位置: 首页 > 文章 > 疏叶骆驼刺适应盐渍生境的离子分布、吸收和运输特征 应用生态学报 2016,27 (11) 3514-3520
Position: Home > Articles > Ion distribution,absorption and translocation characteristics of Alhagi sparsifolia in adaptation to saline habitat Chinese Journal of Applied Ecology 2016,27 (11) 3514-3520

疏叶骆驼刺适应盐渍生境的离子分布、吸收和运输特征

作  者：
罗瀚林;曾凡江;张波;刘波;赵生龙;高欢欢
单  位：
中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室
关键词：
疏叶骆驼刺;离子;盐碱地;适应性
摘  要：
以塔里木盆地南缘关键物种疏叶骆驼刺为材料,研究了不同盐渍土壤生境(轻度盐渍土、中度盐渍土、重度盐渍土)下其器官间Na~+、K~+、Ca~(2+)、Mg~(2+)的分布、吸收及运输特征,以探讨疏叶骆驼刺对自然盐渍生境的适应特性.结果表明:在轻度和中度盐渍土生境,Na~+在各器官中的分布规律为茎≈刺>叶>根,而在重度盐渍土生境,Na~+分布规律为叶>茎≈刺>根;Ca~(2+)和Mg~(2+)在疏叶骆驼刺体内的分布规律为叶>刺>茎>根.随着土壤含盐量的增加,疏叶骆驼刺体内各器官Na~+含量都增大,而叶片中K~+含量呈下降趋势;根和叶器官中K~+/Na~+值明显降低,各器官中Ca~(2+)/Na~(+)、Mg~(2+)/Na~+值都降低.盐渍生境下,疏叶骆驼刺体内Ca~(2+)选择性运输系数和Mg~(2+)选择性运输系数均为茎-叶>茎-刺>根-茎.疏叶骆驼刺为适应盐渍生境,在土壤含盐量较低时,将Na~+聚集于茎和刺;而在土壤含盐量较高时,则将Na~+聚集于叶片.此外,Ca~(2+)和Mg~(2+)可能是疏叶骆驼适应盐渍生境的无机渗透调节物质.
译  名：
Ion distribution,absorption and translocation characteristics of Alhagi sparsifolia in adaptation to saline habitat
作  者：
LUO Han-lin;ZENG Fan-jiang;ZHANG Bo;LIU Bo;ZHAO Sheng-long;GAO Huan-huan;State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences;Cele National Station of Observation and Research for Desert-Grassland Ecosystems;Key Laboratory of Biogeography and Bioresource in Arid Zone,Chinese Academy of Sciences;University of Chinese Academy of Sciences;
关键词：
Alhagi sparsifolia;;ion;;saline and alkaline land;;adaptability
摘  要：
In order to explore the adaptive capacity of Alhagi sparsifolia to soil salinity( mild,moderate,severe saline soil),the distribution,adsorption and translocation characteristics of Na~+,K~+,Ca~(2+),Mg~(2+) in different organs of A. sparsifolia,which is a dominant native vegetation in southern edge of Tarim basin,were investigated. The results showed that when grown on a mild and moderate saline soil,Na~+ distribution in different organs of A. sparsifolia followed the order of stem≈thorn>leaf>root; when grown on a severe saline soil,Na~+ distribution followed leaf >stem≈thorn >root. The distribution of Ca~(2+) and Mg~(2+) followed leaf >thorn>stem>root. With the increase of soil salt level,Na~+ content in different organs of A. sparsifolia increased,while K~+ content in leave decreased; meanwhile the increasing soil salt level significantly decreased the K~+/ Na~+ ratio in both root and leave,as well as the Ca~(2+)/ Na~+ and Mg~(2+)/ Na~+ ratios in all organs. The selective transportation coefficients for Ca~(2+)-Na~+ and Mg~(2+)-Na~+ followed order of stem-leaf>stem-thorn>root-stem under saline habitats. Based on the integrated analysis,in order to adapt to salinity habitat,A. sparsifolia could use multiple organs to accumulate Na~+,depending on soil salt level. Na~+ could accumulate in stem and thorn at a relative low level,but in leaves at high levels. Besides,Ca~(2+) and Mg~(2+) could be the inorganic osmotic adjustment substances for A. sparsifolia to adapt the saline environment.

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