【摘要】 本文综述了植物中的S i及其吸收、运输和沉积的研究进展:(1)植物含S i量因植物种、品种甚至无性系与器官的不同而有较大差异,S i在细胞中呈现区隔化分配;(2)植物中沉积的S i主要是非晶态的S iO2.nH2O(又称硅胶、植物蛋白石、植硅石等),是有机物质矿质化的产物,不同植物所形成的S i化结构及其形态不同,可用于植物分类、鉴定及古气候与环境变化的研究;(3)硅藻和高等植物主要吸收S i(OH)4,高等植物中存在S i主动吸收机制;(4)有机大分子物质(包括多胺、碳水化合物、纤维素)作为有机衬质参与了植物的S i沉积过程;(5)突变体的鉴定和应用,对S i营养研究具有重要作用.更多还原

【Abstract】 The paper summarizes the research advances about silicon absorption,transport and accumulation in plants.（1） in plants,the silicon content greatly varies depending on different species and varieties,even different clones and organs,and cellular silicon distributes in a partitioned manner;（2） in the plants,silicon mainly accumulates in the form of uncrystalline SiO₂·nH₂O（also referred to as silica gel,plant opal and phytolith）,which is a product in the mineralization of organic matters,and different plants uncrystalline SiO₂·nH₂O with different structure and morphologies and thus it can be used in plant classification and identification as well as the research about ancient climates and environments;（3） diatoms and higher plants mainly take up Si（OH）₄ and higher plants have their active uptake mechanisms;（4） big organic molecules（including polyamines,carbohydrate and cellulose） participate in silicon accumulation as matrixes;（5） mutant identification and uses are of importance to studying silicon nutrition.更多还原