盐胁迫下4种耐盐植物渗透调节物质积累的比较  

Comparison on Osmotica Accumulation of Different Salt-tolerant Plants under Salt Stress

作　　者：成铁龙[1] 李焕勇[2] 武海雯[2] 刘正祥[2] 武香[2] 杨升[2] 张华新[2] 杨秀艳[2] 

机构地区：[1]南京林业大学,江苏南京210037 [2]国家林业局盐碱地研究中心,北京100091

出　　处：《林业科学研究》2015年第6期826-832,共7页Forest Research

基　　金：国家自然基金项目(31270707);引进国际先进林业科学技术项目(948项目;项目编号2015-4-12)

摘　　要：为探索不同类型耐盐植物在盐胁迫下体内渗透调节机制,以沙柳、沙枣、柽柳和西伯利亚白刺为研究材料,研究了不同盐浓度(0、100、200、300 mmol·L-1Na Cl)处理下4种耐盐植物体内无机离子和有机溶质含量的变化,比较了其在植物渗透调节中的作用。结果表明:(1)盐处理后4种植物体内Na+、Cl-含量均上升,K+、Ca2+、Mg2+离子含量呈下降趋势;(2)稀盐型盐生植物白刺与泌盐型盐生植物柽柳以Na+为主要无机渗透调节物质,拒盐型耐盐植物沙枣与沙柳以K+为主要无机渗透调节物质;(3)可溶性糖是4种植物盐胁迫下共同的有机渗透调节物质,对沙柳和沙枣尤为重要;在高盐浓度(≥200 mmol·L-1Na Cl)下,脯氨酸是沙枣叶片中重要的有机渗透调节剂;白刺叶片中甜菜碱含量随盐浓度升高明显增加,对提高白刺耐盐能力具有重要作用。4种不同类型耐盐植物在盐渍环境胁迫下所积累的渗透调节物质种类与数量差异明显,渗透调节方式与耐盐机制不同。In this study, the osmotic adjustment mechanism of different salt-tolerant plants under salt stress was analyzed. The Salix psammophila, Elaeagnus angustifolia, Tamarix chinensis and Nitraria sibirica were treated by different salt concentrations （0,100,200, and 300 mmol L-1 NaCl）,the change of the content of inorganic and organic solutes and their role in osmotic adjustment regulation of the 4 types of salt-tolerant plants were evaluated. The re- suits are as follows. （ 1 ） Among the 4 types plants, the content of Na＋ and Cl- increased and K＋ , Ca2＋ , Mg2＋ deangustifolia） took K ＋ as the main inorganic osmotic adjustment. （3）Soluble sugar was the common organic osmotic adjustment tor the four types of plants under salt stress, and it was particularly important for S. psammophila and E. angustifolia;Proline was an important organic osmotic adjustment tor El. angustifolia under high salt concentration （ I〉200 mmol L-1 NaCl）stress;The content of betaine increased significantly with salt concentration increa＇se of N. sibirica leaves, it also has an important role to improve the salt-tolerance of N. sibirica. There were significant

关 键 词：耐盐植物 盐胁迫 渗透调节物质 渗透调节 

分 类 号：S722.3[农业科学—林木遗传育种]