Transfer of arsenic and phosphorus from soils to the fronds and spores of arsenic hyperaccumulator Pteris vittata and three non-hyperaccumulators

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• 作者：Jason T. Lessl ; Dong Xing Guan ; Emily Sessa ; Bala Rathinasabapathi…
• 关键词：Spore ; Hyperaccumulator ; Arsenic ; Phosphate ; Fern ; Pteris vittata
• 刊名：Plant and Soil
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：390
• 期：1-2
• 页码：49-60
• 全文大小：1,730 KB
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• 作者单位：Jason T. Lessl (1) (2)
  Dong Xing Guan (1)
  Emily Sessa (3)
  Bala Rathinasabapathi (4)
  Lena Q. Ma (1) (2)
  
  1. State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu, 210046, China
  2. Soil and Water Science Department, University of Florida, Gainesville, FL, 32611, USA
  3. Department of Biology, University of Florida, Gainesville, FL, 32611, USA
  4. Horticultural Sciences, University of Florida, Gainesville, FL, 32611, USA
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  Soil Science and Conservation
  Plant Physiology
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5036

文摘

Background and aims Concentrations of chemical analogs arsenic (As) and phosphorus (P) were measured in As-hyperaccumulator (Pteris vittata; PV) and three non As-hyperaccumulators (Thelypteris kunthii, Nephrolepsis brownii, and N. falcata) to draw inferences regarding their uptake from soils to roots and translocation to fronds and spores. Methods Frond and root samples of 150 ferns at peak spore maturation were collected with associated soils between July 2012 and July 2014. Results Arsenic in PV spores (45.4-36?mg kg?) exceeded soil As (0.60-11?mg kg?) in all sites and at clean sites (0.60-.17?mg kg?) for non-hyperaccumulator spores (1.83-.60?mg kg?). In PV, As in fronds and spores correlated positively with soil As (r--.71-.74) with bioconcentration factors (tissue As:soil As) of 14.3-54 and 3.26-3.6 compared to 0.08-.44 and 0.03-.37 for three non-hyperaccumulators. However, P in PV spores (1977-832?mg kg?) correlated negatively with frond (1028-439?mg kg?; r-??0.43) and soil (76.2-70?mg kg?; r-??0.34) P. Conclusions PV hyperaccumulates As into fronds and spores from soils with trace As. Since PV spores constituted ~9?% of frond biomass, the elevated spore As may deserve further investigation in their role as a potential health hazard and metal cycling.