盐胁迫对枸杞属两种植物幼苗离子吸收和分配的影响  

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

作　　者：王龙强[1,2] 米永伟[1] 蔺海明[1,2] 

机构地区：[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

出　　处：《草业学报》2011年第4期129-136,共8页Acta Prataculturae Sinica

基　　金：甘肃省自然科学基金项目(1010RJZA203);中国科协科技导报社博士生创新研究计划项目(kjdb20090102-6)资助

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。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.

关 键 词：盐胁迫 枸杞属 幼苗 离子平衡 

分 类 号：S567.19[农业科学—中草药栽培]