南极冰藻(硅藻)细胞质中无机离子的变化与低温适应性的关系  

The Relation between the Changes of Inorganic Ions in the Cytoplasm and Low Temperature Adaptation of Antarctic Ice-microalgae (Myrionema spp.)

作　　者：侯旭光[1] 李光友[2] 姜英辉[2] 

机构地区：[1]山东大学生命科学学院,济南250100 [2]国家海洋局第一海洋研究所,青岛266061

出　　处：《高技术通讯》2002年第6期96-100,共5页Chinese High Technology Letters

基　　金：国家高技术发展计划资助项目 :2 0 0 1AA6 2 0 50 2

摘　　要：利用X 射线微区分析方法研究了南极冰藻在不同温度条件下体内几种重要的无机离子的变化。发现低温条件可以诱导南极冰藻 (硅藻G)细胞质内的钙离子水平在短期大幅度增加 ,但随后随时间的延长而下降。这表明 ,低温能够诱导钙离子向细胞质内流入并发挥其信使功能 ,从而使抗冷基因得到表达而使南极冰藻具有抗冷的性质。低温也使硅藻G细胞质内的其他无机离子含量迅速增加 。By using the X ray microanalysis method, the changes of the inorganic ion of Antarctic ice microalgae (Myrionema spp.) under different temperature was investigated. The results show that low temperature can induces the increase of Ca ions level in cytoplasm of Myrionema spp. in short period, but decrease to the normal level at 48h. This suggest that Ca ions play an important role as the second messenger to induce the express of cold resistance genes to adapt the low temperature. Low temperature also cause the increase of other inorganic ions, we think it is the result of the activity of Low temperature aclaptation of Antarctic ice microclgae.

关 键 词：无机离子 低温适应性 冰藻 Myrionema SPP X-射线微区分析 生理学 钾(I) 氯离子 钙(Ⅱ) 钠(I) 

分 类 号：Q945.78[生物学—植物学]