小麦不同部位组织中镧和其它元素分布的X—射线能谱分析

利用电镜制片技术使进入小麦幼苗的镧离子沉积在原有位置，采用扫描电镜与能谱分析相结合的方法进行研究，结果显示，进入植物体中的镧离子多数积累在根尖细胞壁上，只有少量积累在伸长区皮层细胞壁和叶肉细胞壁上。细胞质中未检测到。表明镧离子只沿细胞壁和壁以外途径传递和分布

X RAY ENERGY SPECTRUM ANALYSIS ON ORGAN DISTRIBUTION OF LANTHANUM AND OTHER ELEMENTS IN WHEAT SEEDLING

Lanthanum and other elements were fixed in situ for integrated SEM observation and x ray energy spectrum analysis.It was showed that most of the lanthanum ions entered the plant were accumulated on the cell wall of root tip, scarcely accumulated on the cell wall of the root cortex of elongation region, and leave; and none in the cytoplasm.It seems that lanthanum ions were transpoted and distributed only along the cell wall.