准噶尔盆地4种盐生植物耐盐机制分析  

Difference of Salt Tolerance of Four Halophytes in Salinized Desert in the Junggar Basin

作　　者：吕湘芳[1] 李利[2] 徐新文[2] 韩张雄[2,3] 

机构地区：[1]新疆农业大学,新疆乌鲁木齐830052 [2]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011 [3]中国科学院研究生院,北京100049

出　　处：《干旱区研究》2010年第1期97-101,共5页Arid Zone Research

基　　金：国家重点基础研究发展计划项目(2009CB421302);中国科学院西部行动计划项目(KZCX2-XB2-13);新疆维吾尔自治区重大科技专项(200733144-3)

摘　　要：对准噶尔盆地4种盐生植物体内的无机离子和有机渗透调节物质含量进行分析。结果表明:稀盐盐生植物囊果碱蓬(Suaeda physophora)和盐节木(Halocnemum strobilaceum)的含水率、肉质化程度及体内茎叶中的K^+,Na^+,Cl^-等离子含量显著高于其地下部分,也高于泌盐盐生植物多枝柽柳(Tamarix ramosissima)和琵琶柴(Reaumuriasoongorica);而多枝柽柳和琵琶柴体内脯氨酸和可溶性糖含量显著高于囊果碱蓬与盐节木。说明在盐渍生境下,囊果碱蓬和盐节木主要通过体内地上部分离子积累和区域化作用降低盐胁迫;而多枝柽柳和琵琶柴则是通过泌盐,将过多的盐分排出体外,同时在植物体内积累有机渗透调节物质来降低盐胁迫。In this study, the concentration of inorganic ions, soluble carbohydrate and proline in four halophytes, Suaeda physophora, Halocnemum strobilaceum, Taraarix ramosissima and Reaumuria soongonica growing in salinized desert in the Junggar Basin, were determined. The results show that the concentrations of inorganic ions K ^＋ , Na ^＋ and Cl^- , water content and succulence degree in eu-halophytes, S. physophora and H. strobilaceum, are considerably higher than that in recreto-halophythes, T. rarrtosissima and R. soongonica; while the concentrations of proline and soluble carbohydrate in T. ramosissima and R. soongonica are remarkably higher than that in S. physophora and H. strobilaceum. These reveal that, under the salt environment, the eu-halophytes, S. physophora and H. strobilaceum, reduce salt stress through ion accumulation and ion compartmentation; but the recretohalophythes, T. ramosissima and R. soongonica, reduce salt stress through excreting salt from plant and accumulating osmotic adjustment substances.

关 键 词：盐渍荒漠 盐生植物 无机离子 脯氨酸 可溶性糖 准噶尔盆地 

分 类 号：Q945.78[生物学—植物学]