碱性盐胁迫下星星草幼苗中几种渗透调节物质的变化(英文)  

CHANGES OF SEVERAL OSMOTICA IN PUCCINELLIA TENUIFLORA SEEDLING UNDER ALKALI SALT STRESS

作　　者：阎秀峰[1] 孙国荣[2] 李晶[3] 肖玮[2] 

机构地区：[1]东北林业大学森林植物生态学开放研究实验室,哈尔滨150040 [2]哈尔滨师范大学生物系,哈尔滨150080 [3]东北农业大学基础部,哈尔滨150030

出　　处：《植物研究》1999年第3期347-353,共7页Bulletin of Botanical Research

摘　　要：模拟松嫩盐碱草地碱化土壤的离子组成配制碱性盐溶液处理星星草（Ｐｕｃｃｉｎｅｌｌｉａｔｅｎｕｉｆｌｏｒａ）幼苗，测定了碱性盐胁迫下星星草幼苗地上部分几种渗透调节物质含量的变化。随着碱性盐浓度及胁迫天数的增加，Ｎａ＋ 、可溶性盐、游离脯氨酸和可溶性糖的含量逐渐增加，其中游离脯氨酸的变化倍数最大。Ｋ＋ 含量在浓度小于２０ｇ Ｌ－１ 碱性盐胁迫下随胁迫天数增加而略为减少，在４０ ｇ Ｌ－１ 和６０ ｇ Ｌ－１碱性盐胁迫下先是降低，而后迅速增加。Puccinellia tenuiflora seedlings were treated by alkaline salt solution that was made up according to ions composition of the alkaline soil of Songnen alkaline grassland. Contents of several osmotica in above-ground part of P. tenuiflora seedling under alkaline salt stress were determined. With the increment of alkaline salt concentration and stress days, content of Na +, soluble salt, free proline and soluble carbohydrate increased gradually, and the change of free proline is the greatest. Under the stress of alkaline salt which concentration is smaller than 20 g L -1 , K + content decreased a little with the stress days, and under the concentration of 40 g L -1 and 60 g L -1 , K + content decreased first, and then increased rapidly.

关 键 词：星星草 碱性盐胁迫 渗透调节物质 

分 类 号：Q948.113[生物学—植物学]