盐碱胁迫下西伯利亚蓼体内无机离子的变化

研究了碳酸氢钠溶液处理后西伯利亚蓼营养器官内部无机离子含量的变化。实验结果表明碳酸氢钠溶液处理前西伯利亚蓼茎部认为是“K+库”;碳酸氢钠溶液处理过程中“K+库”转变成为“Na+库”,以维持叶部的正常生理功能,并且“Na+库”具有一定的限度;碳酸氢钠溶液处理后,西伯利亚蓼不同部位对外界盐碱胁迫的反应存在多样性。植株在“Na+库”达到限度之前进行旺盛的光合作用,在有限的时间内向地下组织输送更多的有机养分,用以繁殖后代。

The location patterns of inorganic ions in different parts of Polygonum sibiricum under salt and alkaline stress condition

In this paper,the changing patterns of inorganic ions content,in different parts of Polygonum sibiricum,were investigated under salt and alkaline stress condition. The results showed that,the diversity of response to salt and alkaline stress was presented in different parts of the plant;Under normal environment,the stem could be seen as a K reservoir and turned into a Na reservoir after treated by NaHCO_3 solution which could reduce the concentration of Na in leaf tissues and maintain its physiological functions;The plant use the limited time to ship out photosynthesis,aiming at accumulating of more organic nutrient and transfer it to underground tissues for propagation before the Na reservoir reach its capacity, which has its upper limit.