变水植物直叶灰藓渗透调节性研究  

The Study on Osmotic Regulation of Poikilohydric Plant Hypnum Vaucheri Lesq

作　　者：魏先君[1] 斯琴巴特尔[1] 田桂泉[1] 孟根小[2] 

机构地区：[1]内蒙古师范大学生命科学学院,内蒙古呼和浩特010022 [2]内蒙古民族大学蒙医药学院,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2010年第2期168-170,共3页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：国家自然科学基金资助项目(30760042);内蒙古高等学校科学研究项目(NJ06114)

摘　　要：用不同浓度的PEG-6000溶液处理直叶灰藓,研究渗透胁迫处理对其渗透调节的影响.结果表明,不同强度的渗透胁迫处理引起直叶灰藓可溶性蛋白质含量先增后减,而其脯氨酸、游离氨基酸和可溶性糖含量随着渗透胁迫的加强呈增加趋势.直叶灰藓Na+含量大于K+含量,Na+/K+为4.50;在渗透胁迫处理过程中Na+积累显著大于K+,Na+/K+达到7.74.说明Na+是直叶灰藓主要的细胞液渗透调节剂.The different concentrative PEG-6000 solution treating with Hypnum vaucheri Lesq studied the effect of osmotic stress on the osmotic regulation. The experiment results showed that the osmotic stress treatment with different intensity PEG-6000 caused the soluble protein content of Hypnum vaucheri Lesq.increasing at first and then decreasing,while the content of proline,free amino acid and soluble sugar tended to increase with the intensifying of osmotic stress. Na＋content of Hypnum vaucheri Lesq was more than that of K＋,and Na＋/K＋ was 4.50. During the process of osmotic stress treatment,the accumulation of Na＋ was larger than that of K＋,and Na＋ /K＋ reached 7.74. It was indicated that Na＋ was main osmotic adjustment substance of cell sap of Hypnum vaucheri Lesq.

关 键 词：直叶灰藓 渗透胁迫 渗透调节 

分 类 号：Q945[生物学—植物学]