Collaborative Research: Understanding and Enhancement of Arsenic Hyperaccumulation by a Fern Plant

合作研究：蕨类植物对砷超积累的理解和增强

• 批准号: 0132114
• 负责人: Jean-Francois Gaillard
• 金额: $ 6.92万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0132114&HistoricalAwards=false
• 关键词: Collaborative; Research; Understanding; Enhancement; Arsenic

0132114GaillardThe objective of this research is to understand the mechanisms of arsenic uptake, translocation, distribution and detoxification by Brake fern. The efficiency of arsenic uptake by Brake fern suggests the cost-effective use of this plant for the remediation of arsenic contaminated soils. This research focuses on elemental interactions of arsenic with calcium and phosphorus, plant biochemical responses under arsenic stresses, speciation and characterization of arsenic in the plant using analytical, microscopic and spectroscopic techniques, and microbe-root-plant-arsenic interactions. Arsenic hyperaccumulation characteristics in Brake fern growing in soils of different arsenic concentrations will be investigated using arsenic spiked soils. The impacts of P (increases arsenic availability yet competes with arsenic uptake) and Ca (increases plant arsenic uptake and translocation) on arsenic accumulation, and biochemical responses of Brake fern to elevated arsenic (detoxification) will be examined. Also, the beneficial effects of mycorrhizal fungi for enhancing arsenic accumulation by Brake fern will be explored. This is a collaborative research project between the University of Florida (0132089) and Northwestern University (0132114). These two awards were made pursuant to the Joint Program on Phytoremediation, 2001-STAR-C1 (EPA, NSF, ONR, SERDP).

0132114 Gaillard本研究的目的是了解铁蕨对砷的吸收、转运、分配和解毒机制。 通过Brake fern的砷吸收效率表明，这种植物用于砷污染土壤的修复具有成本效益。本研究的重点是元素砷与钙和磷的相互作用，砷胁迫下的植物生化反应，砷在植物中的形态和表征，利用分析，显微镜和光谱技术，和微生物根植物砷的相互作用。 采用砷加标土壤，研究了不同砷浓度土壤中生长的蕨菜对砷的超积累特性。磷（增加砷的可用性，但与砷的吸收竞争）和钙（增加植物砷的吸收和转运）对砷的积累和生物化学反应的制动蕨提高砷（解毒）的影响将被检查。 此外，还将探讨菌根真菌对提高蕨菜砷积累的有益作用。这是佛罗里达大学（0132089）和西北大学（0132114）之间的合作研究项目。 这两个奖项是根据植物修复联合计划，2001-STAR-C1（EPA，NSF，ONR，SERDP）。