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首页> 外文期刊>Environmental Science & Technology >Arsenic Induced Phytate Exudation, and Promoted FeAsO_4 Dissolution and Plant Growth in As-Hyperaccumulator Pteris vittata
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Arsenic Induced Phytate Exudation, and Promoted FeAsO_4 Dissolution and Plant Growth in As-Hyperaccumulator Pteris vittata

机译：砷诱导超级富集凤尾蕨中植酸的植酸盐渗出并促进FeAsO_4溶解和植物生长

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摘要

Arsenic hyperaccumulator Pteris vittata (PV) is efficient in taking up As and nutrients from As-contaminated soils. We evaluated the mechanisms used by PV to mobilize As and Fe by examining the impacts of As and root exudates on FeAsO_4 solubilization, and As and Fe uptake in four plants: As- hyperaccumulators PV and Pteris multifida (PM), nonhyperaccu-mulator Pteris ensiformis (PE), and angiosperm plant tomato (Solatium lycopersicum). Phytate and oxalate were dominant in fern plants (＞93％), which were 50-83, 15-42, and 0-32 mg kg~(－1) phytate and 10-15, 7-26, and 4-12 mg kg~(－1) oxalate for PV, PM, and PE respectively, with higher As inducing greater phytate exudation and no phytate being detected in tomato exudates. PV treated with phytate+FeAsO_4 had higher As and Fe contents and larger biomass than phytate or FeAsO_4 treatment, which were 340 vs 20 and 130 mg kg~(－1) As in the fronds and 7900 vs 1600 and 4100 mg kg~(－1) Fe in the roots. We hypothesized that As-induced phytate exudation helped PV to take up Fe and As from insoluble FeAsO_4 and promoted PV growth. Our study suggests that phytate exudation may be special to fern plants, which may play an important role in enhancing As and nutrient uptake by plants, thereby increasing their efficiency in phytoremediation of As-contaminated soils.
机译：砷超富集者凤尾蕨（PV）可以有效吸收砷污染土壤中的砷和养分。我们通过检查As和根系渗出物对FeAsO_4增溶以及As和Fe摄取的影响，评估了PV在四种植物中的动员机制：As-超蓄积剂PV和Pteris multifida（PM），非超级蓄积者Pteris ensiformis （PE）和被子植物番茄（Solatium lycopersicum）。蕨类植物的植酸盐和草酸盐占主导地位（＞ 93％），分别为50-83、15-42和0-32 mg kg〜（-1）植酸盐和10-15、7-26和4-12 mg kg〜（－1）草酸盐分别用于PV，PM和PE，较高的As引起更大的植酸盐渗出，在番茄渗出物中未检测到植酸盐。植酸盐+ FeAsO_4处理的PV比植酸盐或FeAsO_4处理具有更高的As和Fe含量和更大的生物量，分别为340 vs. 20和130 mg kg〜（－1）As，而7900 vs 1600和4100 mg kg〜（－ 1）铁在根中。我们假设砷诱导的植酸盐渗出帮助PV从不溶性FeAsO_4中吸收了Fe和As，并促进了PV的生长。我们的研究表明，蕨类植物的植酸盐分泌可能是特殊的，蕨类植物的分泌可能在增强植物对砷和养分的吸收方面起着重要作用，从而提高了植物对被砷污染的土壤进行植物修复的效率。

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  • 来源
    《Environmental Science & Technology》 |2016年第17期|9070-9077|共8页
  • 作者

    Xue Liu; Jing-Wei Fu; Dong-Xing Guan; Yue Cao; Jun Luo; Bala Rathinasabapathi; Yanshan Chen; Lena Q. Ma;

  • 作者单位

    State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China;

    State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China;

    State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China;

    State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China;

    State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China;

    Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611, United States;

    State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China;

    State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China,Soil and Water Science Department, University of Florida, Gainesville, Florida 32611, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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