Au的生物地球化学异常和对植物细胞的变异效应

Gold biogeochemical anomaly and aberrance effect of botanic cell tissue

对从金矿区和背景区采集和试验种植的植物样品的研究表明,在杉木、马尾松和蕨的叶灰分中,矿区相对于背景区,前者的Au含量是后者的135倍、111倍和147倍;前者的Cu是后者的12倍、8倍和11倍;前者的Pb是后者的11倍、11倍和14倍。试验的高Au含量土壤中生长的青菜和芥菜Au含量分别是对照自然土壤中生长的229倍和205倍。Au等元素高含量土壤中生长的植物的细胞,在电子显微镜下变异效应明显,主要表现为细胞中出现大量电子致高密度体物质或内部组织的微结构遭受损伤。金矿区的植物样品中电子致高密度体物质含有20.160%～37.321%的Au、3.828%～23.324%的Cu及较多的Pb和Ag。种植的样品电子致高密度体物质含Au34.969%。说明Au等元素以电子致高密度体物质的“形式”淀积在细胞的内部组织结构中。

The researches on botanic samples from the Longshui gold field and the background area show that Au content in leaf ash of Cunninghamia lanceolata, Pinus massoniana and Pteridium aquilinum var. latiusculum in the gold field is 135, 111 and 147 times as much as that in the background area, respectively; and Cu and Pb contents in leaf ash of these three types of plants in the gold field are 12, 8, 11 and 11, 11, 14 times as much as that in the background area, respectively. Au content in ash of Brassica Chinese and Brassica juncea planted in the rich Au soil is 229, 205 times as much as that in natural/normal soil, respectively. By the electron microscope observation, the aberrance effect of cell tissue of plants vegetated in the rich Au (and other elements) soil is obvious. There is much high electron density substance and the superfine configuration in the cell is damnified. High electron density substance in the cell of plants in gold field is rich in Au (20.160%～37.321%) and Cu (3.828%～23.324%), with Pb and Ag anomalies, and that in the plant cell sample planted contain Au 34.969%. It may be concluded that Au (Cu, Pb, Ag, etc.) may deposit within the botanic cell tissue in the form of high electron density substance.