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首页> 外文期刊>Water, Air, and Soil Pollution >ARSENIC UPTAKE BY TWO HYPERACCUMULATOR FERNS FROM FOUR ARSENIC CONTAMINATED SOILS
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ARSENIC UPTAKE BY TWO HYPERACCUMULATOR FERNS FROM FOUR ARSENIC CONTAMINATED SOILS

机译：四种被高砷污染土壤从砷污染土壤中吸收砷

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A greenhouse study was conducted to evaluate and compare arsenic accumulation from four arsenic contaminated soils by two arsenic hyperaccumulators, Pteris vittata and Pteris cretica. After growing in soils for six weeks, the plants were harvested and separated into above- and below-ground biomass. Total As, P, Ca, K, glutathione and biomass were measured for the plants, and total As, Mehlich-3 P and As, exchangeable K and Ca, and arsenic fractionation were performed for the soils. Pteris vittata had significantly higher total biomass (14 g/plant) and As accumulation than P. cretica. Arsenic accumulation in both ferns followed the arsenic concentrations in the soil. The P/As molar ratio in the fronds, growing in arsenic contaminated soils, ranged from 80 to 939 in P. vittata and 130 to 421 in P. cretica. Plant arsenic concentrations were significantly positively correlated with Mehlich-3 arsenic in the soils. Soil pH was also significantly correlated with Mehlich-3 arsenic before and after plant uptake. Plant As uptake was significantly correlated with exchangeable potassium in the soil before plant uptake. Glutathione availability was not implicated as a major detoxification mechanism in these ferns. Though both plants were effective in taking up arsenic from various arsenic contaminated soils, P. vittata was overall a better candidate for phytoremediation of arsenic contaminated soils.
机译：进行了一项温室研究，以评估和比较两种砷超积累剂，凤尾蕨和凤尾蕨在四种受砷污染的土壤中的砷积累。在土壤中生长六周后，收获植物并将其分为地上和地下生物量。测量了植物的总砷，磷，钙，钾，谷胱甘肽和生物量，并对土壤进行了总砷，Mehlich-3 P和砷，可交换钾和钙以及砷的分馏。凤尾蕨的总生物量（14 g /株）和As的积累明显高于cr假单胞菌。两种蕨类植物中的砷积累都遵循土壤中砷的浓度。在受砷污染的土壤中生长的叶状体中的P / As摩尔比，在P. vittata中为80-939，在P.cretica中为130-421。土壤中的植物砷浓度与Mehlich-3砷呈显着正相关。植株吸收前后土壤pH值也与Mehlich-3砷显着相关。植物吸收前，植物吸收砷与土壤中交换性钾显着相关。在这些蕨类植物中，谷胱甘肽的有效性没有被认为是主要的解毒机制。尽管两种植物均能有效地从各种砷污染的土壤中吸收砷，但总的来说，P。vittata是植物修复砷污染的土壤的更好人选。

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