摘要
以济薯21、济徐23、济薯04150、徐薯26、徐薯27和徐薯28共6个甘薯品种为试材,用1/5 Hoag-land营养液附加不同浓度NaCl(0、0.2%、0.3%和0.5%)处理甘薯苗,观察其生长情况;100 d后取样分别测定根、茎、叶中的Na+含量和K+含量。结果表明,随着NaCl浓度升高,不同甘薯品种的生长均受到抑制,其中徐薯26受抑制程度最大;根、茎、叶中的Na+含量及Na+/K+比值都有所增加,根中Na+含量最高,而叶中Na+含量最低。可见盐胁迫条件下甘薯将较多的Na+储存在根中从而减少对地上部叶片的伤害,这可能是其忍耐高盐环境的重要机制之一。
Six sweet potato varieties（J21,JX23,J04150,X26,X27 and X28） were used as the test materials and treated by sodium chloride with the concentration of 0,0.2%,0.3% and 0.5% for 100 days.The growth of sweet potatoes was observed and the concentration of Na＋ and K＋ were measured in the roots,stems and leaves.The results showed that under salt stress,the growth of all the tested sweet potatoes,especially X26,was inhibited.The concentration of Na＋ and the ratio of Na＋/K＋ in the roots,stems and leaves increased;Na＋ content was the highest in the roots and the lowest in the leaves.In conclusion,storing most of Na＋ in roots to reduce its damage to leaves may be an important way for sweet potatoes to endure higher salinity.
出处
《山东农业科学》
2012年第1期43-46,共4页
Shandong Agricultural Sciences
基金
国家科技支撑计划项目(2009BADA7B05)
关键词
甘薯
盐胁迫
Na+含量
Na+/K+比值
Sweet potato（Ipomoea batatas L.）
Salt stress
Na＋ content
Ratio of Na＋/K＋
