碱性盐胁迫下星星草幼苗中几种渗透调节物质的变化-东北林业大学.PDF

　　　　　　　　　 BULLET IN OF BOTA NICA L RESEARCH 19 　3 1999 　7 Vol.19 　No.3 July, 　1999 1 2 3 2 阎秀峰 　孙国荣 　李　晶 　肖　玮 (1., 150040) (2., 150080)　(3., 　150030) 　　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 (P uccinellia ten u if lor a )幼苗, 测定了碱性盐胁迫 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20 L-1碱性盐胁迫 随胁迫天数增加而略为减少, 在40 L-1和60 L-1 碱性盐胁迫 先是降低, 而后迅速增加。 　星星草;碱性盐胁迫;渗透调节物质 CHANGES OF SEVERAL OSMOTICA IN P UCCINELLIA TEN UIFL ORA SEEDLING UNDER ALKALI SALT STRESS 1 2 1 2 Yan Xiu-fen 　Sun Guo-ron 　Li Jin 　Xiao Wei (1.Open Research Laboratory of Forest Plant Ecolo y, Northeast Forestry University, Harbin 150040) (2.Department of Biolo y, Harbin Normal University, Harbin 150080) (3.Northeast A riculture University, Herbin 150030) Abstract　P uccinellia ten u if lora seedlin s w ere treated by alkaline salt solution that was made up accordin to ions composition of the alkaline soil of Son nen alkaline rassland.Contents of several osmotica in above - round part of P .ten uif lora seedlin under alkaline salt stress w ere determined.With the increment of alkaline salt + concentration and stress day s, content of Na , soluble salt, free proline and soluble carbohydrate increased radually, and the chan e of free proline is the r