NaCl胁迫对滨梅Na^+、K^+含量及其分布的影响  

Effect of NaCl Stress on the Na^+,K^+ Content and Distribution in Beach Plum

作　　者：宰学明 张焕仕[2] 王春彦 ZAI Xue-ming;ZHANG Huan-shi;Wang Chun-yan(Jinling Institute of Technology,Nanjing 210038,China;Institution for the Comprehensive Utilization of Wild Plants,Nanjing 210042,China)

机构地区：[1]金陵科技学院园艺园林学院,江苏南京210038 [2]南京野生植物综合利用研究院,江苏南京210042

出　　处：《金陵科技学院学报》2018年第1期79-83,共5页Journal of Jinling Institute of Technology

基　　金：江苏省自然科学基金面上项目(BK20151098;BK20141064);江苏省林业三新工程项目(LYSX[2015]15);金陵科技学院校内基金项目(40410491)

摘　　要：研究了不同浓度NaCl胁迫对滨梅苗根部和地上部、根组织各部位Na^+和K^+含量的影响。结果表明:0.3%、0.6%NaCl胁迫下,滨梅根部的K^+、Na^+含量均显著上升,地上部的K^+含量显著上升,Na^+含量与对照无显著差异;1.2%NaCl胁迫下,滨梅根部和地上部K^+含量均显著下降,Na^+含量显著上升。扫描电镜结合能谱仪分析显示:滨梅根尖细胞在吸收离子时具有选择性,拒绝Na^+离子进入植物体内,致使中、低浓度NaCl胁迫时,地上部仍然保持较高的[K^+]/[Na^+]比值,从而保持滨梅苗较强的耐盐性。研究表明滨梅可能是通过拒盐的方式,获得盐胁迫下的高耐受性。The effects of different concentrations of NaCl stress on the Na+and K+content in the root and shoot tissues of beach plum were studied.The results showed that,under the stress of 0.3%NaCl and 0.6%NaCl,the Na+and K+content in the root of beach plum increased significantly,while the K+content in the shoot tissues increased and there was significant difference in Na+content;Under the stress of 1.2%NaCl,the K+content in the root and shoot tissues of beach plum significantly decreased,while the Na+content increased significantly.The trial showed,by scanning electron microscopy with the combination of energy spectrum apparatus,that the root tip cells of beach plum absorbed ion selectivity and refused Na+ions into the plants.Consequently,under low and medium concentrations of NaCl stress,the shoot parts remained high[K+]/[Na+]ratio,and maintained the beach plum seedlings highly tolerant to NaCl.Studies indicated that the beach plum could possibly obtain the high tolerance under salt stress through the way of refusing NaCl.

关 键 词：滨梅 NACL 离子 分布 

分 类 号：S662.4[农业科学—果树学]