大叶井口边草——一种新发现的富集砷的植物

Cretan Brake (Pteris cretica L.): an Arsenic-accumulating Plant

自 1 999年以来对位于湖南省一些高砷区的植物和土壤进行了一系列的野外调查 ,以着力寻找砷的超富集植物。结果表明 ,与砷超富集植物蜈蚣草同属的另一种植物——大叶井口边草 ,对砷也具有显著的富集特征。这一发现为研究揭示砷在植物中的超富集机理提供了一种新的材料。建议深入开展蜈蚣草与大叶井口边草这两种砷富集植物的对比研究。

The writers have conducted a series of field investigations in the areas with high soil arsenic background values in southern China's Hunan Province to search for arsenic accumulating-plants since 1999. It has been discovered that Cretan brake (Pteris cretica L.), from the same genus of a recently discovered As-hyperaccumulator Pteris vittata L., is also an arsenic-accumulating plant. Cretan brake thus provides us a new plant material to study the mechanism of As-accumulation. The authors suggest that further comparison studies on the two As-accumulating plants should be conducted in the future.