EAR-PF: Mechanisms Influencing Arsenic speciation and bioavailability at the plant-soil interface on Native American lands

EAR-PF：影响美洲原住民土地植物-土壤界面砷形态和生物利用度的机制

• 批准号: 1952817
• 负责人: Cherie DeVore
• 金额: $ 17.4万
• 依托单位: DeVore, Cherie
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2022-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1952817&HistoricalAwards=false
• 关键词: EAR; PF; Mechanisms; Influencing; Arsenic

An NSF EAR Postdoctoral Fellowship has been granted to Dr. Cherie L. De Vore to conduct research and training initiatives at Stanford University under the mentorship of Dr. Scott Fendorf. The project seeks to identify mechanisms affecting the uptake and bioavailability of arsenic in culturally relevant plants from Native American communities. By better understanding arsenic uptake using controlled laboratory experiments, it will be possible to determine strategies for immobilizing metals and limiting exposure routes to the environment and to humans. This work uses community-driven partnerships and interdisciplinary collaborations that will ultimately contribute to reducing arsenic exposure to protect the health of Native American communities, which is one of the main broader impacts of this project. The results of this project offer a unique opportunity to translate knowledge about arsenic uptake to benefit underserved tribal communities with the goal of promoting social equity. Direct educational benefits include environmental research and training for a Native American Postdoctoral researcher and community partners. Extensive abandoned mine waste sites in the western United States near tribal lands are poorly managed. The detection of arsenic in plant tissues grown in mining-impacted sediment drives the investigation of Dr. De Vore aimed at better understanding of the role of fungal endophytes and natural organic matter (NOM) on the accumulation of arsenic in relevant plants used by Native American communities. The integration of aqueous chemistry, DNA sequencing, spectroscopy and microscopy techniques will allow the identification of biogeochemical mechanisms affecting arsenic speciation and bioavailability in plant-soil micro-zone environments that are currently not well understood. Results from this initiative will be useful to help identify potential exposure pathways and enhance risk reduction strategies for communities living near these sites. Further, advancing knowledge of the biogeochemical processes can then steer remediation efforts that may require a sizable federal investment. The results of this study have relevant implications for informing tribal and regulatory decision makers, as well as environmental risk assessments and phytoremediation efforts for communities located near abandoned mine waste sites. This project was co-funded by the Geobiology and Low-Temperature Geochemistry program in the division of Earth Sciences.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

Cherie L. De Vore博士被授予NSF EAR博士后奖学金，在Scott Fendorf博士的指导下在斯坦福大学进行研究和培训计划。该项目旨在确定影响美洲土著社区文化相关植物对砷的吸收和生物利用度的机制。通过使用受控的实验室实验更好地了解砷的吸收，将有可能确定固定金属和限制暴露于环境和人类途径的策略。这项工作利用社区驱动的伙伴关系和跨学科合作，最终将有助于减少砷暴露，保护美洲土著社区的健康，这是该项目主要的广泛影响之一。该项目的成果提供了一个独特的机会，将有关砷吸收的知识转化为服务不足的部落社区，以促进社会公平。直接的教育效益包括环境研究和对美国原住民博士后研究员和社区合作伙伴的培训。在美国西部靠近部落土地的大量废弃矿山废料场管理不善。在受采矿影响的沉积物中生长的植物组织中检测到砷，这推动了De Vore博士的调查，旨在更好地了解真菌内生菌和天然有机物质（NOM）在美洲原住民社区使用的相关植物中砷积累的作用。水化学、DNA测序、光谱学和显微镜技术的整合将使人们能够确定影响植物-土壤微带环境中砷形态和生物可利用性的生物地球化学机制，这些机制目前尚未得到很好的理解。这一举措的结果将有助于确定潜在的暴露途径，并加强居住在这些地点附近的社区的风险降低战略。此外，生物地球化学过程的先进知识可以指导可能需要大量联邦投资的补救工作。这项研究的结果对告知部落和监管决策者，以及对废弃矿山废物场附近社区的环境风险评估和植物修复工作具有相关意义。本项目由地球科学部地球生物学和低温地球化学项目共同资助。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Arsenic Accumulation in Hydroponically Grown Schizachyrium scoparium (Little Bluestem) Amended with Root-Colonizing Endophytes.

• DOI: 10.1021/acsearthspacechem.0c00302
• 发表时间: 2021-06-17
• 期刊: ACS earth & space chemistry
• 影响因子: 3.4
• 作者: DeVore CL;Hayek EE;Busch T;Long B;Mann M;Rudgers JA;Ali AS;Howard T;Spilde MN;Brearley A;Ducheneaux C;Cerrato JM
• 通讯作者: Cerrato JM