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Linking Plant Adaptation, Stress Responses, and Plant-Soil-Microbe Interactions in Metal Contaminated Mine Tailings: Phytoremediation Potential of Atriplex lentiformis
Linking Plant Adaptation, Stress Responses, and Plant-Soil-Microbe Interactions in Metal Contaminated Mine Tailings: Phytoremediation Potential of Atriplex lentiformis
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091502.5
- ISBN
- 9798314878439
- DDC
- 631
- 서명/저자
- Linking Plant Adaptation, Stress Responses, and Plant-Soil-Microbe Interactions in Metal Contaminated Mine Tailings: Phytoremediation Potential of <em>Atriplex lentiformis</em> / Kamila Murawska-Wlodarczyk
- 발행사항
- [Sl] : The University of Arizona, 2025
- 형태사항
- 1 electronic resource (184 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisors: Babst-Kostecka, Alicja Committee members: Maier, Raina M.; Tfaily, Malak; Duhamel, Solange.
- 학위논문주기
- - Ph.D. : The University of Arizona, 2025.
- 초록/해제
- 요약Phytoremediation is a sustainable and eco-friendly approach to reclaim legacy mine sites. However, unfavorable biogeochemical characteristics of legacy mine tailings, including low fertility, high salinity, lack of soil structure, and high concentrations of toxic metal(loid)s, often hinder plant establishment and limit the success of phytoremediation, particularly in arid and semi-arid areas. To overcome these challenges, various strategies have been implemented, such as capping tailings with a topsoil layer or utilizing compost-assisted direct planting. Yet, the success of these methods remains inconsistent due to specific plant responses and their sensitivity to local environmental conditions. Moreover, prolonged exposure to adverse abiotic and biotic conditions may not only trigger stress responses but also drive cumulative adaptive changes in plants. Therefore, this study explores multiple aspects of plant adaptation, stress responses, and plant-soil-microbe interactions in phytoremediation.The selected model species for this study is Atriplex lentiformis - a metal-tolerant, halophytic species native to the U.S. Southwest and northern Mexico. Despite its frequent use in phytoremediation projects, the species' responses to diverse environmental conditions, its establishment across various soil substrates, and its patterns of metal tolerance and accumulation patterns remain poorly understood. This dissertation aims to: i) investigate how long-term exposure to metal-contaminated mine tailings influences reproductive strategies, including germination success, elemental uptake, and allocation within seeds; ii) assess how biochemical variability in topsoil stockpile materials affects A. lentiformis seed germination and early plant establishment; and iii) examine metal accumulation patterns and stress responses in this species along a gradient of metal toxicity.Key findings highlight the strong dependence of A. lentiformis on soil chemical properties and microbial community structure. Long-term exposure of A. lentiformis individuals to metal-contaminated mine tailings induced significant changes in seed development and elemental allocation, with notable increases in Zn accumulation. Elevated Zn was particularly evident as hotspots of high concentrations in critical seed embryo regions, raising concerns about the potential impact on seed viability. Germination and early seedling growth were found to be controlled by distinct biochemical soil variables, with the species exhibiting poor performance in degraded, nutrient-deficient soils derived from topsoil stockpiles. Finally, while the species generally exhibited a tolerance and exclusion strategy for most toxic metal(loid)s in soil, extreme soil metal concentrations triggered a shift to Zn accumulation in leaves. This switch to accumulation was strongly linked to specific microbial taxa originating from legacy mine tailings, highlighting the importance of plant-microbe interactions in phytoremediation projects.This dissertation provides a comprehensive evaluation of A. lentiformis for phytoremediation applications, while also highlighting potential ecological trade-offs associated with metal accumulation in plant tissues. Ultimately, these findings contribute to refining revegetation and phytoremediation strategies by identifying the conditions under which A. lentiformis is best suited for phytostabilization or phytoextraction, thereby enhancing the effectiveness of mine site reclamation efforts.
- 언어주기
- English
- 일반주제명
- Environmental science
- 일반주제명
- Microbiology
- 일반주제명
- Plant sciences
- 일반주제명
- Soil sciences
- 키워드
- Phytoremediation
- 키워드
- Plant adaptation
- 기타저자
- The University of Arizona Environmental Science
- 기본자료저록
- Dissertations Abstracts International. 86-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■1001 ▼aMurawska-Wlodarczyk, Kamila▼eauthor.▼0(orcid)0000-0002-8417-757X
■24510▼aLinking Plant Adaptation, Stress Responses, and Plant-Soil-Microbe Interactions in Metal Contaminated Mine Tailings: Phytoremediation Potential of emAtriplex lentiformis/em ▼cKamila Murawska-Wlodarczyk
■260 ▼a[Sl]▼bThe University of Arizona▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (184 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-11, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisors: Babst-Kostecka, Alicja Committee members: Maier, Raina M.; Tfaily, Malak; Duhamel, Solange.
■5021 ▼bPh.D.▼cThe University of Arizona▼d2025.
■520 ▼aPhytoremediation is a sustainable and eco-friendly approach to reclaim legacy mine sites. However, unfavorable biogeochemical characteristics of legacy mine tailings, including low fertility, high salinity, lack of soil structure, and high concentrations of toxic metal(loid)s, often hinder plant establishment and limit the success of phytoremediation, particularly in arid and semi-arid areas. To overcome these challenges, various strategies have been implemented, such as capping tailings with a topsoil layer or utilizing compost-assisted direct planting. Yet, the success of these methods remains inconsistent due to specific plant responses and their sensitivity to local environmental conditions. Moreover, prolonged exposure to adverse abiotic and biotic conditions may not only trigger stress responses but also drive cumulative adaptive changes in plants. Therefore, this study explores multiple aspects of plant adaptation, stress responses, and plant-soil-microbe interactions in phytoremediation.The selected model species for this study is Atriplex lentiformis - a metal-tolerant, halophytic species native to the U.S. Southwest and northern Mexico. Despite its frequent use in phytoremediation projects, the species' responses to diverse environmental conditions, its establishment across various soil substrates, and its patterns of metal tolerance and accumulation patterns remain poorly understood. This dissertation aims to: i) investigate how long-term exposure to metal-contaminated mine tailings influences reproductive strategies, including germination success, elemental uptake, and allocation within seeds; ii) assess how biochemical variability in topsoil stockpile materials affects A. lentiformis seed germination and early plant establishment; and iii) examine metal accumulation patterns and stress responses in this species along a gradient of metal toxicity.Key findings highlight the strong dependence of A. lentiformis on soil chemical properties and microbial community structure. Long-term exposure of A. lentiformis individuals to metal-contaminated mine tailings induced significant changes in seed development and elemental allocation, with notable increases in Zn accumulation. Elevated Zn was particularly evident as hotspots of high concentrations in critical seed embryo regions, raising concerns about the potential impact on seed viability. Germination and early seedling growth were found to be controlled by distinct biochemical soil variables, with the species exhibiting poor performance in degraded, nutrient-deficient soils derived from topsoil stockpiles. Finally, while the species generally exhibited a tolerance and exclusion strategy for most toxic metal(loid)s in soil, extreme soil metal concentrations triggered a shift to Zn accumulation in leaves. This switch to accumulation was strongly linked to specific microbial taxa originating from legacy mine tailings, highlighting the importance of plant-microbe interactions in phytoremediation projects.This dissertation provides a comprehensive evaluation of A. lentiformis for phytoremediation applications, while also highlighting potential ecological trade-offs associated with metal accumulation in plant tissues. Ultimately, these findings contribute to refining revegetation and phytoremediation strategies by identifying the conditions under which A. lentiformis is best suited for phytostabilization or phytoextraction, thereby enhancing the effectiveness of mine site reclamation efforts.
■546 ▼aEnglish
■590 ▼aSchool code: 0009
■650 4▼aEnvironmental science
■650 4▼aMicrobiology
■650 4▼aPlant sciences
■650 4▼aSoil sciences
■653 ▼aMetal contamination
■653 ▼aPhytoremediation
■653 ▼aPlant adaptation
■653 ▼aPlant-soil-microbe interactions
■653 ▼aSoil microbiology
■7102 ▼aThe University of Arizona▼bEnvironmental Science.▼edegree granting institution.
■7201 ▼aBabst-Kostecka, Alicja▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g86-11B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357175▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


