耐盐性不同的小麦根和根茎结合部的拒Na^+作用  

Na^+ Exclusion by Roots and Root-Stem Junctions of Wheat Cultivars with Different Salt Tolerance

作　　者：杨洪兵[1] 丁顺华[1] 邱念伟[1] 王宝山[1] 崔大勇[2] 

机构地区：[1]山东师范大学逆境植物研究所,济南250014 [2]中国科学院上海植物生理研究所,上海200032

出　　处：《植物生理学报（0257-4829)》2001年第2期179-185,共7页Acta Phytophysiologica Sinica

基　　金：国家自然科学基金 (3 95 70 0 6);山东省中青年科学家奖励基金 (971114 0 2 )项目资助

摘　　要：NaCl处理引起小麦幼苗干重下降 ,盐敏感品种比耐盐品种下降幅度要大。盐敏感品种的拒Na+ 能力为 35 %左右 ,耐盐品种的拒Na+ 能力为 5 0 %～ 6 0 %左右 ,这表明耐盐品种的拒Na+ 能力远远大于盐敏感品种。不同耐盐性小麦的拒Na+ 部位不同 ,盐敏感品种的拒Na+ 部位主要在根茎结合部 ,而耐盐品种的拒Na+NaCl treatment caused a decrease in dry weight of wheat seedlings,and the degree of decrease was higher in salt sensitive cultivars than in salt tolerant ones. The Na + exclusion capability of salt sensitive cultivars was about 35%,and that of salt tolerant cultivars was 50%～60% (Table 2). This suggests that the Na + exclusion capability of salt tolerant cultivars is stronger than salt sensitive ones. It also indicates that the Na + exclusion localization of wheat with different salt tolerance was different:In salt sensitive cultivars,Na + exclusion occurred mainly in the root stem junction,but salt tolerant cultivars occurred mainly in the root (Fig.6).

关 键 词：小麦 氯化钠处理 木质部汁液 拒钠离子能力 拒钠离子部位 耐盐性 根部根茎结合部 

分 类 号：Q945[生物学—植物学]