Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA.
Bioresour Technol. 2010 Apr;101(8):2691-9. doi: 10.1016/j.biortech.2009.11.070. Epub 2009 Dec 30.
This study evaluated the ability and mechanisms of 19 Pteris and non-Pteris species to accumulate arsenic (As) in a hydroponic system spiked with 300 microM As. The study included four Pteris vittata accessions (China, India, Poland, and the United Kingdom), P. biaurita and 17 non-Pteris species. Among the accessions, P. vittata from China and UK were the most and the least efficient in terms of As accumulation. The non-Pteris species Chielanthes sinuta, Adiantum raddianum, Polystichum acrostichoides, Actiniopteris radiata, Pellaea rotundifolia, and Nephrolepis cordifolia concentrated As as effectively as the least efficient P. vittata ascension. As (III) in the fronds of P. vittata accessions ranged from 59% to 89% and for non-Pteris species it ranged from 47% to 65%. Maximum As accumulation coincided with highest percentage of As (III) in the fronds. The phosphorus (P) uptake of P. vittata accessions was 12-15 and 6-12 times greater than the As-uptake in the roots and fronds, respectively. In contrast, the P-uptake of non-Pteris species ranged from 9 to 151 and from 4 to 162 times the As-uptake, in the roots and fronds, respectively. Arsenic accumulation occurs at the expense of root and frond P-uptake. Root P-reduction is lower than frond and the P:As in the plant acquisition part (roots) is 1-3 times greater than that in accumulation part (fronds). A. radiata, C. sinuta, and P. acrostichoides were identified as potential As accumulators.
本研究评估了 19 种凤尾蕨和非凤尾蕨物种在水培系统中积累砷（As）的能力和机制，该系统中添加了 300μM 的 As。研究包括四个凤尾蕨（中国、印度、波兰和英国）、蜈蚣草和 17 种非凤尾蕨物种。在这些品系中，中国和英国的凤尾蕨在砷积累方面效率最高和最低。非凤尾蕨物种中华凤尾蕨、疏叶凤尾蕨、密叶凤尾蕨、叉蕨、荷叶铁线蕨和肾蕨与效率最低的凤尾蕨品系一样有效地浓缩砷。凤尾蕨品系的叶片中砷（III）含量范围为 59%-89%，而非凤尾蕨物种的砷（III）含量范围为 47%-65%。最大砷积累与叶片中最高百分比的砷（III）相吻合。凤尾蕨品系的磷（P）吸收量分别比根和叶中的砷吸收量高 12-15 倍和 6-12 倍。相比之下，非凤尾蕨物种的磷吸收量分别比根和叶中的砷吸收量高 9-151 倍和 4-162 倍。砷积累是以根和叶吸收 P 为代价的。根 P 还原低于叶片，植物吸收部分（根）的 P:As 是积累部分（叶片）的 1-3 倍。叉蕨、中华凤尾蕨和密叶凤尾蕨被鉴定为潜在的砷积累者。
