NaCl胁迫下沙枣幼苗的离子代谢特性  

Study on Ion Metabolism Characteristics of Elaeagnus angustifolia Seedlings under NaC l Stress

作　　者：杨升[1,2] 张华新[1] 刘涛[1] 武海雯[1] 杨秀艳[1] 倪建伟[1] 陈秋夏[2] 

机构地区：[1]国家林业局盐碱地研究中心,北京100091 [2]浙江省亚热带作物研究所,浙江温州325005

出　　处：《林业科学研究》2016年第1期140-146,共7页Forest Research

基　　金：中央级公益性科研院所基本科研业务费专项资金项目"重要耐盐碱树种多层次遗传改良与种质创新"(CAFYBB2012009)

摘　　要：沙枣（Elaeagnus angustifolia L.）是胡颓子科（Elaeagnaceae）胡颓子属（Elaeagnus Lnn.）的落叶小乔木,主要分布于我国西北五省,在新疆塔里木河、玛纳斯河、甘肃疏勒河、内蒙古的额济纳河两岸有天然的沙枣林分布,在北京、天津和山东等地也开展了引种栽培[1-2]。沙枣的果实、叶片、花和种子等在食品加工、药物提炼和饲用开发等领域具有较高的价值,沙枣木材也是高级家具和工艺品制作的良材[1];同时,沙枣具有耐旱、耐盐碱和抗风沙的特性,并且沙枣根系上有固氮根瘤菌,能提高土壤肥力,改善土壤环境,因此,[Objective]To further understand the ion metabolism characteristics of Elaeagnus angustifolia L. under Na Cl stress. [Method]The seedlings of two E. angustifolia L. provenances,which were Alaer（ salt tolerance provenance） and Yinchuan（ salt sensitive provenance）,were treated by three Na Cl concentrations（ 0,150,300 mmol·L- 1） and sampled at the 7th day and the 30 th day to measure the Na＋,K＋,Ca2 ＋,and Mg2 ＋contents,K＋/ Na＋ratio and selective absorption and transportation of K＋in tissues（ roots,stems and leaves）. [Result]The results showed that the Na＋content in the organizations of E. angustifolia L. sharply increased with the increase of Na Cl concentration. With prolonging of stress time,the Na＋content increased in roots,and decreased in stems and leaves. After seedlings of the two provenances were treated with 150 mmol·L- 1Na Cl for 7 days,the Na＋content was2. 10 times and 2. 23 times in leaves,respectively,compared with the control groups,and was 1. 79 times and 1. 57 times in root. Meanwhile,the difference between two provenances showed a expanding trend with the increase of Na Cl concentration and stress time. With the increase of Na Cl concentration and extension of stress time,the K＋content,Ca2 ＋content and K＋/ Na＋ratio in organizations decreased gradually. Meanwhile,the Alaer provenance seedlings accumulated more Na＋in roots and less Na＋in leaves than that of Yinchuan provenance,and the K＋content,Ca2 ＋content and K＋/ Na＋ratio decreased less in the Alaer provenance seedlings than those of Yinchuan provenance. With the increase of Na Cl concentration,the Mg2 ＋content in leaf gradually decrease,but the Mg2 ＋content in root increased 22. 8 64. 4% after salt stress for 7 days,and Alaer provenance seedlings increased more than Yinchuan provenance. After 30 days,there was non- significant difference with the control group on the Mg2 ＋content of root. K＋selective absorption of E. angustifolia L. seedlings significantly increased with increasing sa

关 键 词：沙枣 NAC l胁迫 离子代谢 种源 

分 类 号：S793.9[农业科学—林木遗传育种]