作 者：
雷越;曾丽萍;周双云;张丹;王文昌;李新国
单 位：
广西农业科学院园艺研究所;海南大学热带作物种质资源保护与开发利用教育部重点实验室
摘 要：
试验采用不同浓度海水对主栽品种‘宝岛蕉’幼苗进行不同天数水培处理,研究其根系活力及离子含量的响应。结果表明,海水在一定程度上构成盐分胁迫,盐胁迫逆境下处理12 d后,根系活力20%处理比对照显著下降19.49%,‘宝岛蕉’根系活力均随着胁迫程度和胁迫时间的增加而显著下降;5%处理促进叶片Ca2+吸收,比对照显著增加10.38%,K+/Na+比值显著下降,说明盐分胁迫可能引起K+叶片与根系之间的运输障碍,导致离子平衡被破坏。因此,海水对根系影响显著于叶片,低浓度(5%)海水可在一定程度上提高‘宝岛蕉’幼苗耐盐能力,高浓度(10%和20%)海水处理对‘宝岛蕉’幼苗构成盐害。‘宝岛蕉’可通过离子含量变化的调节机制适应一定浓度海水环境。
译 名：
Effects of different concentrations of seawater on root vigor and ion content of Baodao banana seedlings
作 者：
LEI Yue;ZENG Li-ping;ZHOU Shuang-yun;ZHANG Dan;WANG Wen-chang;LI Xin-guo;
关键词：
Baodao banana;;seawater;;root vigor;;ion content
摘 要：
The research used different concentrations of seawater on the Baodao banana seedings to study root activity and ion content test with hydroponics of different days. Results showed that seawater lead to salt stress to some extent. The root activity of 20% treatment was less than the control group by 19.49% under salt stress adversity for 12 d. The root activity decreased significantly with the increase of stress degree and stress time. 5% treatment promoted the leaf absorption of Ca2+, and the Ca2+ content was higher than the control group with 10.38%. Significant decreased K+/Na+ ratio indicated that salinity stress may cause the K+ transport barriers between the blades and the roots, and so lead to the destruction of ion balance. Therefore, the impact on the root of the seawater is greater than that on the blade. Low concentration(5%) of seawater can increase the salt tolerance of Baodao banana seedling, and the high concentration(10% and 20%) of seawater on the seedlings would lead to salt damage. Baodao banana can adapted to the marine environment with a certain concentration through the regulatory mechanisms of the ion content.
