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Eevera T, Kumaran S, Djanaguiraman M, Thirumaran T, Le QH, Pugazhendhi A. Unleashing the potential of nanoparticles on seed treatment and enhancement for sustainable farming. ENVIRONMENTAL RESEARCH 2023; 236:116849. [PMID: 37558116 DOI: 10.1016/j.envres.2023.116849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 07/28/2023] [Accepted: 08/06/2023] [Indexed: 08/11/2023]
Abstract
The foremost challenge in farming is the storage of seeds after harvest and maintaining seed quality during storage. In agriculture, studies showed positive impacts of nanotechnology on plant development, seed storage, endurance under various types of stress, detection of seed damages, and seed quality. Seed's response varies with different types of nanoparticles depending on its physical and biochemical properties and plant species. Herein, we aim to cover the impact of nanoparticles on seed coating, dormancy, germination, seedling, nutrition, plant growth, stress conditions protection, and storage. Although the seed treatment by nanopriming has been shown to improve seed germination, seedling development, stress tolerance, and seedling growth, their full potential was not realized at the field level. Sustainable nano-agrochemicals and technology could provide good seed quality with less environmental toxicity. The present review critically discusses eco-friendly strategies that can be employed for the nanomaterial seed treatment and seed enhancement process to increase seedling vigor under different conditions. Also, an integrated approach involving four innovative concepts, namely green co-priming, nano-recycling of agricultural wastes, nano-pairing, and customized nanocontainer storage, has been proposed to acclimatize nanotechnology in farming.
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Affiliation(s)
- Tamilmani Eevera
- Department of Seed Science and Technology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
| | - Shanmugam Kumaran
- Department of Biotechnology, Periyar Maniammai Institute of Science & Technology (Deemed to be University), Vallam, Thanjavur, 613 403, Tamil Nadu, India
| | - Maduraimuthu Djanaguiraman
- Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
| | - Thanabalu Thirumaran
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551
| | - Quynh Hoang Le
- School of Medicine and Pharmacy, Duy Tan University, Da Nang, Viet Nam; Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam
| | - Arivalagan Pugazhendhi
- School of Medicine and Pharmacy, Duy Tan University, Da Nang, Viet Nam; Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam.
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Goyal V, Rani D, Ritika, Mehrotra S, Deng C, Wang Y. Unlocking the Potential of Nano-Enabled Precision Agriculture for Efficient and Sustainable Farming. PLANTS (BASEL, SWITZERLAND) 2023; 12:3744. [PMID: 37960100 PMCID: PMC10649170 DOI: 10.3390/plants12213744] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023]
Abstract
Nanotechnology has attracted remarkable attention due to its unique features and potential uses in multiple domains. Nanotechnology is a novel strategy to boost production from agriculture along with superior efficiency, ecological security, biological safety, and monetary security. Modern farming processes increasingly rely on environmentally sustainable techniques, providing substitutes for conventional fertilizers and pesticides. The drawbacks inherent in traditional agriculture can be addressed with the implementation of nanotechnology. Nanotechnology can uplift the global economy, so it becomes essential to explore the application of nanoparticles in agriculture. In-depth descriptions of the microbial synthesis of nanoparticles, the site and mode of action of nanoparticles in living cells and plants, the synthesis of nano-fertilizers and their effects on nutrient enhancement, the alleviation of abiotic stresses and plant diseases, and the interplay of nanoparticles with the metabolic processes of both plants and microbes are featured in this review. The antimicrobial activity, ROS-induced toxicity to cells, genetic damage, and growth promotion of plants are among the most often described mechanisms of operation of nanoparticles. The size, shape, and dosage of nanoparticles determine their ability to respond. Nevertheless, the mode of action of nano-enabled agri-chemicals has not been fully elucidated. The information provided in our review paper serves as an essential viewpoint when assessing the constraints and potential applications of employing nanomaterials in place of traditional fertilizers.
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Affiliation(s)
- Vinod Goyal
- Department of Botany and Plant Physiology, CCS Haryana Agricultural University, Hisar 125004, Haryana, India
| | - Dolly Rani
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, Haryana, India
| | - Ritika
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, Haryana, India
| | - Shweta Mehrotra
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar 125001, Haryana, India
| | - Chaoyi Deng
- Department of Analytical Chemistry, Connecticut Agricultural Experiment Station, New Haven, CT 06511, USA; (C.D.); (Y.W.)
| | - Yi Wang
- Department of Analytical Chemistry, Connecticut Agricultural Experiment Station, New Haven, CT 06511, USA; (C.D.); (Y.W.)
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Santás-Miguel V, Arias-Estévez M, Rodríguez-Seijo A, Arenas-Lago D. Use of metal nanoparticles in agriculture. A review on the effects on plant germination. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122222. [PMID: 37482337 DOI: 10.1016/j.envpol.2023.122222] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/09/2023] [Accepted: 07/17/2023] [Indexed: 07/25/2023]
Abstract
Agricultural nanotechnology has become a powerful tool to help crops and improve agricultural production in the context of a growing world population. However, its application can have some problems with the development of harvests, especially during germination. This review evaluates nanoparticles with essential (Cu, Fe, Ni and Zn) and non-essential (Ag and Ti) elements on plant germination. In general, the effect of nanoparticles depends on several factors (dose, treatment time, application method, type of nanoparticle and plant). In addition, pH and ionic strength are relevant when applying nanoparticles to the soil. In the case of essential element nanoparticles, Fe nanoparticles show better results in improving nutrient uptake, improving germination, and the possibility of magnetic properties could favor their use in the removal of pollutants. In the case of Cu and Zn nanoparticles, they can be beneficial at low concentrations, while their excess presents toxicity and negatively affects germination. About nanoparticles of non-essential elements, both Ti and Ag nanoparticles can be helpful for nutrient uptake. However, their potential effects depend highly on the crop type, particle size and concentration. Overall, nanotechnology in agriculture is still in its early stages of development, and more research is needed to understand potential environmental and public health impacts.
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Affiliation(s)
- Vanesa Santás-Miguel
- Departamento de Bioloxía Vexetal e Ciencias do Solo, Área de Edafoloxía e Química Agrícola. Facultade de Ciencias, Universidade de Vigo, As Lagoas s/n, 32004, Ourense, Spain; Instituto de Agroecoloxía e Alimentación (IAA). Universidade de Vigo - Campus Auga, 32004, Ourense, Spain; Department of Biology, Microbial Ecology, Lund University, Ecology Building, Lund, SE-223 62, Sweden.
| | - Manuel Arias-Estévez
- Departamento de Bioloxía Vexetal e Ciencias do Solo, Área de Edafoloxía e Química Agrícola. Facultade de Ciencias, Universidade de Vigo, As Lagoas s/n, 32004, Ourense, Spain; Instituto de Agroecoloxía e Alimentación (IAA). Universidade de Vigo - Campus Auga, 32004, Ourense, Spain.
| | - Andrés Rodríguez-Seijo
- Departamento de Bioloxía Vexetal e Ciencias do Solo, Área de Edafoloxía e Química Agrícola. Facultade de Ciencias, Universidade de Vigo, As Lagoas s/n, 32004, Ourense, Spain; Instituto de Agroecoloxía e Alimentación (IAA). Universidade de Vigo - Campus Auga, 32004, Ourense, Spain.
| | - Daniel Arenas-Lago
- Departamento de Bioloxía Vexetal e Ciencias do Solo, Área de Edafoloxía e Química Agrícola. Facultade de Ciencias, Universidade de Vigo, As Lagoas s/n, 32004, Ourense, Spain; Instituto de Agroecoloxía e Alimentación (IAA). Universidade de Vigo - Campus Auga, 32004, Ourense, Spain.
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Ghouri F, Shahid MJ, Liu J, Sun L, Riaz M, Imran M, Ali S, Liu X, Shahid MQ. The protective role of tetraploidy and nanoparticles in arsenic-stressed rice: Evidence from RNA sequencing, ultrastructural and physiological studies. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:132019. [PMID: 37437486 DOI: 10.1016/j.jhazmat.2023.132019] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/21/2023] [Accepted: 07/06/2023] [Indexed: 07/14/2023]
Abstract
Genome doubling in plants induces physiological and molecular changes to withstand environmental stress. Diploid rice (D-2x) and its tetraploid (T-4x) plants were treated with 25 μM Arsenic (As) and 15 mg L-1 TiO2 nanoparticles (NPs), and results indicated decreased growth and photosynthetic activity with high accumulation of reactive oxygen species (ROS) due to the As-toxicity in rice lines, significantly in D-2x rice plants. The treatment of As-contaminated rice with TiO2 NPs resulted in increased root length (8.17%) and chlorophyll AB (13.28%) and decreased electrolyte leakage (21.76%) and H2O2 (17.65%) contents than its counterpart diploid rice. Moreover, TiO2 NPs improved the activity of peroxidase, catalase, glutathione, and superoxide dismutase and reduced lipid peroxidation due to lower ROS production in D-2x and T-4x under As toxicity. Transcriptome analysis revealed abrupt changes in the expression levels of key signaling heat shock proteins, tubulin, aquaporins, As, and metal transporters under As toxicity in T-4x and D-2x lines. The KEGG and GO studies highlighted the striking distinctions between rice lines under As-stress in glutathione metabolism, H2O2 catabolic process, MAPK signaling pathway, and carotenoid biosynthesis terms, revealing consistency between physiological and molecular results. Root cells from D-2x rice were significantly more distorted by As poisoning than those from 4x rice, and cell organelles, such as mitochondria and endoplasmic reticulum, were changed or deformed. These findings proved the superiority of tetraploid rice lines over their diploid counterpart in coping with As-stress.
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Affiliation(s)
- Fozia Ghouri
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Munazzam Jawad Shahid
- Department of Environmental Sciences, Government College University, Faisalabad 38000, Pakistan
| | - Jingwen Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Lixia Sun
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Muhammad Riaz
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
| | - Muhammad Imran
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
| | - Shafaqat Ali
- Department of Environmental Sciences, Government College University, Faisalabad 38000, Pakistan; Department of Biological Sciences and Technology, China Medical University, Taichung 40402, Taiwan.
| | - Xiangdong Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; College of Agriculture, South China Agricultural University, Guangzhou 510642, China.
| | - Muhammad Qasim Shahid
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou 510642, China; College of Agriculture, South China Agricultural University, Guangzhou 510642, China.
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5
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Ahmad MA, Adeel M, Shakoor N, Ali I, Ishfaq M, Haider FU, Deng X. Unraveling the roles of modified nanomaterials in nano enabled agriculture. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 202:107944. [PMID: 37579682 DOI: 10.1016/j.plaphy.2023.107944] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 08/04/2023] [Indexed: 08/16/2023]
Abstract
Nanotechnology has emerged as a key empowering technology for agriculture production due to its higher efficiency and accurate target delivery. However, the sustainable and effective application of nanotechnology requires nanomaterials (NMs) to have higher stability and less aggregation/coagulation at the reaction sites. This can ideally be achieved by modifying NMs with some surfactants or capping agents to ensure higher efficiency. These modified nanomaterials (MNMs) stabilize the interface where NMs interact with their medium of preparation and showed a significant improvement in mobility, reactivity, and controlled release of active ingredients for nano-enabled agriculture. Several environmental factors (e.g., pH, organic matter and the oxidation-reduction potential) could alter the interaction of MNMs with agricultural plants. Firstly, this novel review article introduces production technologies and a few frequently used modification agents in synthesizing MNMs. Next, we critically elaborate the leveraging progress in the modified nano-enabled agronomy and unveil their phytoremediation potential. Lastly, we propose a framework to overcome current challenges and develop a strategy for safe, effective and acceptable applications of MNMs in nano-enabled agriculture. However, the long-term effectiveness and reactivity of MNMs should be investigated to assess their technology effectiveness and optimize the process design to draw definite conclusions.
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Affiliation(s)
- Muhammad Arslan Ahmad
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Muhammad Adeel
- BNU-HKUST Laboratory of Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Tangjiawan, Zhuhai, Guangdong, China.
| | - Noman Shakoor
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation and College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Ilyas Ali
- Department of Medical Cell Biology and Genetics, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Muhammad Ishfaq
- Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, 100193, Beijing, China
| | - Fasih Ullah Haider
- China Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Xu Deng
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China.
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6
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Pagano L, Rossi R, White JC, Marmiroli N, Marmiroli M. Nanomaterials biotransformation: In planta mechanisms of action. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 318:120834. [PMID: 36493932 DOI: 10.1016/j.envpol.2022.120834] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 10/25/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Research on engineered nanomaterials (ENMs) exposure has continued to expand rapidly, with a focus on uncovering the underlying mechanisms. The EU largely limits the number and the type of organisms that can be used for experimental testing through the 3R normative. There are different routes through which ENMs can enter the soil-plant system: this includes the agricultural application of sewage sludges, and the distribution of nano-enabled agrochemicals. However, a thorough understanding of the physiological and molecular implications of ENMs dispersion and chronic low-dose exposure remains elusive, thus requiring new evidence and a more mechanistic overview of pathways and major effectors involved in plants. Plants can offer a reliable alternative to conventional model systems to elucidate the concept of ENM biotransformation within tissues and organs, as a crucial step in understanding the mechanisms of ENM-organism interaction. To facilitate the understanding of the physico-chemical forms involved in plant response, synchrotron-based techniques have added new potential perspectives in studying the interactions between ENMs and biota. These techniques are providing new insights on the interactions between ENMs and biomolecules. The present review discusses the principal outcomes for ENMs after intake by plants, including possible routes of biotransformation which make their final fate less uncertain, and therefore require further investigation.
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Affiliation(s)
- Luca Pagano
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124, Parma, Italy
| | - Riccardo Rossi
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124, Parma, Italy; Centro Interdipartimentale per L'Energia e L'Ambiente (CIDEA), University of Parma, 43124, Parma, Italy
| | - Jason C White
- The Connecticut Agricultural Experiment Station, New Haven, CT, 06504, USA
| | - Nelson Marmiroli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124, Parma, Italy; Consorzio Interuniversitario Nazionale per le Scienze Ambientali (CINSA), University of Parma, 43124, Parma, Italy
| | - Marta Marmiroli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124, Parma, Italy; Interdepartmental Centre for Food Safety, Technologies and Innovation for Agri-food (SITEIA.PARMA), 43124, Parma, Italy.
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7
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Wang Y, Deng C, Shen Y, Borgatta J, Dimkpa CO, Xing B, Dhankher OP, Wang Z, White JC, Elmer WH. Surface Coated Sulfur Nanoparticles Suppress Fusarium Disease in Field Grown Tomato: Increased Yield and Nutrient Biofortification. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:14377-14385. [PMID: 36331134 DOI: 10.1021/acs.jafc.2c05255] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Little is known about the effect of nano sulfur (NS) under field conditions as a multifunctional agricultural amendment. Pristine and surface coated NS (CS) were amended in soil at 200 mg/kg that was planted with tomato (Solanum lycopersicum) and infested with Fusarium oxysporum f. sp. lycopersici. Foliar exposure of CS (200 μg/mL) was also included. In healthy plants, CS increased tomato marketable yield up to 3.3∼3.4-fold compared to controls. In infested treatments, CS significantly reduced disease severity compared to the other treatments. Foliar and soil treatment with CS increased yield by 107 and 192% over diseased controls, respectively, and significantly increased fruit Ca, Cu, Fe, and Mg contents. A $33/acre investment in CS led to an increase in marketable yield from 4920 to 11,980 kg/acre for healthy plants and from 1135 to 2180 kg/acre for infested plants, demonstrating the significant potential of this nanoenabled strategy to increase food production.
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Affiliation(s)
- Yi Wang
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut06504, United States
| | - Chaoyi Deng
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West University Avenue, El Paso, Texas79968, United States
| | - Yu Shen
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut06504, United States
| | - Jaya Borgatta
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut06504, United States
| | - Christian O Dimkpa
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut06504, United States
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, Massachusetts01003, United States
| | - Om Parkash Dhankher
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, Massachusetts01003, United States
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi214122, China
| | - Jason C White
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut06504, United States
| | - Wade H Elmer
- Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut06504, United States
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8
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Kala S, Jawle CKD, Sogan N, Agarwal A, Kant K, Mishra BK, Kumar J. Analogous foliar uptake and leaf-to-root translocation of micelle nanoparticles in two dicot plants of diverse families. NANOIMPACT 2022; 28:100431. [PMID: 36206944 DOI: 10.1016/j.impact.2022.100431] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 09/05/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Bio-inspired nanoparticles, including metallic, micelles, and polymeric, have been explored as a novel tool in the quest for effective and safe agrochemicals. Although nanoparticles (NPs) are being rapidly investigated for their usefulness in agricultural production and protection, little is known about the behaviour and interaction of oil-in-water micelle nanoparticles or nano-micelles (NM) with plants. We loaded a bio-based resin inherent of tree from the Pinaceae family as active material and produced stable nano-micelles using a natural emulsifier system. Here, we show that foliar-applied nano-micelle can translocate in two dicot plants belonging to diverse families (Coriandrum sativum -Apiaceae and Trigonella foenumgraecum -Fabaceae) via similar mode. Fluorescent-tagged NM (average diameter 11.20nm) showed strong signals and higher intensities as revealed by confocal imaging and exhibited significant adhesion in leaf compared to control. The NM subsequently translocates to other parts of the plants. As observed by SEM, the leaf surface anatomies revealed higher stomata densities and uptake of NM by guard cells; furthermore, larger extracellular spaces in mesophyll cells indicate a possible route of NM translocation. In addition, NM demonstrated improved wetting-spreading as illustrated by contact angle measurement. In a field bioassay, a single spray application of NM offered protection from aphid infestation for at least 9 days. There were no signs of phytotoxicity in plants post-application of NM. We conclude that pine resin-based nano-micelle provides an efficient, safe, and sustainable alternative for agricultural applications.
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Affiliation(s)
- Smriti Kala
- Formulation Division, Institute of Pesticide Formulation Technology (IPFT), Gurugram 122016, Haryana, India.
| | - Chetan K D Jawle
- Formulation Division, Institute of Pesticide Formulation Technology (IPFT), Gurugram 122016, Haryana, India
| | - Nisha Sogan
- Deapartment of Botany, Deshbandhu College, University of Delhi, Kalkaji, New Delhi 110019, India
| | - Amrish Agarwal
- Formulation Division, Institute of Pesticide Formulation Technology (IPFT), Gurugram 122016, Haryana, India
| | - Krishna Kant
- National Research Center for Seed Spice Research, Ajmer 305206, India
| | - B K Mishra
- National Research Center for Seed Spice Research, Ajmer 305206, India
| | - Jitendra Kumar
- Formulation Division, Institute of Pesticide Formulation Technology (IPFT), Gurugram 122016, Haryana, India
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9
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Piao S, He D. Sediment Bacteria and Phosphorus Fraction Response, Notably to Titanium Dioxide Nanoparticle Exposure. Microorganisms 2022; 10:microorganisms10081643. [PMID: 36014061 PMCID: PMC9412993 DOI: 10.3390/microorganisms10081643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/08/2022] [Accepted: 08/11/2022] [Indexed: 11/17/2022] Open
Abstract
Titanium dioxide nanoparticle (TiO2 NP) toxicity to the growth of organisms has been gradually clarified; however, its effects on microorganism-mediated phosphorus turnover are poorly understood. To evaluate the influences of TiO2 NPs on phosphorus fractionation and the bacterial community, aquatic microorganisms were exposed to different concentrations of TiO2 NPs with different exposure times (i.e., 0, 10, and 30 days). We observed the adhesion of TiO2 NPs to the cell surfaces of planktonic microbes by using SEM, EDS, and XRD techniques. The addition of TiO2 NPs resulted in a decrease in the total phosphorus of water and an increase in the total phosphorus of sediments. Additionally, elevated TiO2 NPs enhanced the sediment activities of reductases (i.e., dehydrogenase [0.19–2.25 μg/d/g] and catalase [1.06–2.92 μmol/d/g]), and significantly decreased the absolute abundances of phosphorus-cycling-related genes (i.e., gcd [1.78 × 104–9.55 × 105 copies/g], phoD [5.50 × 103–5.49 × 107 copies/g], pstS [4.17 × 102–1.58 × 106 copies/g]), and sediment bacterial diversity. TiO2 NPs could noticeably affect the bacterial community, showing dramatic divergences in relative abundances (e.g., Actinobacteria, Acidobacteria, and Firmicutes), coexistence patterns, and functional redundancies (e.g., translation and transcription). Our results emphasized that the TiO2 NP amount—rather than the exposure time—showed significant effects on phosphorus fractions, enzyme activity, phosphorus-cycling-related gene abundance, and bacterial diversity, whereas the exposure time exhibited a greater influence on the composition and function of the sediment bacterial community than the TiO2 NP amount. Our findings clarify the responses of phosphorus fractions and the bacterial community to TiO2 NP exposure in the water–sediment ecosystem and highlight potential environmental risks of the migration of untreated TiO2 NPs to aquatic ecosystems.
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Wang Y, Deng C, Elmer WH, Dimkpa CO, Sharma S, Navarro G, Wang Z, LaReau J, Steven BT, Wang Z, Zhao L, Li C, Dhankher OP, Gardea-Torresdey JL, Xing B, White JC. Therapeutic Delivery of Nanoscale Sulfur to Suppress Disease in Tomatoes: In Vitro Imaging and Orthogonal Mechanistic Investigation. ACS NANO 2022; 16:11204-11217. [PMID: 35792576 DOI: 10.1021/acsnano.2c04073] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nanoscale sulfur can be a multifunctional agricultural amendment to enhance crop nutrition and suppress disease. Pristine (nS) and stearic acid coated (cS) sulfur nanoparticles were added to soil planted with tomatoes (Solanum lycopersicum) at 200 mg/L soil and infested with Fusarium oxysporum. Bulk sulfur, ionic sulfate, and healthy controls were included. Orthogonal end points were measured in two greenhouse experiments, including agronomic and photosynthetic parameters, disease severity/suppression, mechanistic biochemical and molecular end points including the time-dependent expression of 13 genes related to two S bioassimilation and pathogenesis-response, and metabolomic profiles. Disease reduced the plant biomass by up to 87%, but nS and cS amendment significantly reduced disease as determined by area-under-the-disease-progress curve by 54 and 56%, respectively. An increase in planta S accumulation was evident, with size-specific translocation ratios suggesting different uptake mechanisms. In vivo two-photon microscopy and time-dependent gene expression revealed a nanoscale-specific elemental S bioassimilation pathway within the plant that is separate from traditional sulfate accumulation. These findings correlate well with time-dependent metabolomic profiling, which exhibited increased disease resistance and plant immunity related metabolites only with nanoscale treatment. The linked gene expression and metabolomics data demonstrate a time-sensitive physiological window where nanoscale stimulation of plant immunity will be effective. These findings provide mechanistic understandings of nonmetal nanomaterial-based suppression of plant disease and significantly advance sustainable nanoenabled agricultural strategies to increase food production.
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Affiliation(s)
- Yi Wang
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | - Chaoyi Deng
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, United States
| | - Wade H Elmer
- Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | - Christian O Dimkpa
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | - Sudhir Sharma
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Gilberto Navarro
- Department of Physics, The University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, United States
| | - Zhengyang Wang
- Department of Environmental Sciences, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | - Jacquelyn LaReau
- Department of Environmental Sciences, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | - Blaire T Steven
- Department of Environmental Sciences, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control and School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Lijuan Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Chunqiang Li
- Department of Physics, The University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, United States
| | - Om Parkash Dhankher
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Jorge L Gardea-Torresdey
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, United States
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Jason C White
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, Connecticut 06504, United States
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11
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Deng C, Wang Y, Cantu JM, Valdes C, Navarro G, Cota-Ruiz K, Hernandez-Viezcas JA, Li C, Elmer WH, Dimkpa CO, White JC, Gardea-Torresdey JL. Soil and foliar exposure of soybean (Glycine max) to Cu: Nanoparticle coating-dependent plant responses. NANOIMPACT 2022; 26:100406. [PMID: 35588596 DOI: 10.1016/j.impact.2022.100406] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 04/02/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
In this study, we investigated the effects of citric acid (CA) coated copper oxide nanoparticles (CuO NPs) and their application method (foliar or soil exposure) on the growth and physiology of soybean (Glycine max). After nanomaterials exposure via foliar or soil application, Cu concentration was elevated in the roots, leaves, stem, pod, and seeds; distribution varied by plant organ and surface coating. Foliar application of CuO NPs at 300 mg/L and CuO-CA NPs at 75 mg/L increased soybean yield by 169.5% and 170.1%, respectively. In contrast, foliar and soil exposure to ionic Cu with all treatments (75 and 300 mg/L) had no impact on yield. Additionally, CuO-CA NPs at 300 mg/L significantly decreased Cu concentration in seeds by 46.7%, compared to control, and by 44.7%, compared to equivalent concentration of CuO NPs. Based on the total Cu concentration, CuO NPs appeared to be more accessible for plant uptake, compared to CuO-CA NPs, inducing a decrease in protein content by 56.3% and inhibiting plant height by 27.9% at 300 mg/kg under soil exposure. The translocation of Cu from leaf to root and from the root to leaf through the xylem was imaged by two-photon microscopy. The findings indicate that citric acid coating reduced CuO NPs toxicity in soybean, demonstrating that surface modification may change the toxic properties of NPs. This research provides direct evidence for the positive effects of CuO-CA NPs on soybean, including accumulation and in planta transfer of the particles, and provides important information when assessing the risk and the benefits of NP use in food safety and security.
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Affiliation(s)
- Chaoyi Deng
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Yi Wang
- The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06504, USA
| | - Jesus M Cantu
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Carolina Valdes
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Gilberto Navarro
- Department of Physics, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Keni Cota-Ruiz
- DOE - Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
| | - Jose Angel Hernandez-Viezcas
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Chunqiang Li
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Wade H Elmer
- The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06504, USA
| | - Christian O Dimkpa
- The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06504, USA
| | - Jason C White
- The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06504, USA
| | - Jorge L Gardea-Torresdey
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA; Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA.
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12
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Wang Y, Dimkpa C, Deng C, Elmer WH, Gardea-Torresdey J, White JC. Impact of engineered nanomaterials on rice (Oryza sativa L.): A critical review of current knowledge. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 297:118738. [PMID: 34971745 DOI: 10.1016/j.envpol.2021.118738] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/02/2021] [Accepted: 12/20/2021] [Indexed: 05/27/2023]
Abstract
After use, a large number of engineered materials (ENMs) are directly or indirectly released into the environment. This may threaten the agricultural ecosystem, especially with crops under high demand for irrigation water, such as rice (Oryza sativa L.), a crop that feeds nearly half of the world's population. However, consistent and detailed information on the effects of nanoparticles in rice is limited. This review is a systematic exploration of the effects of ENMs on rice, with a critical evaluation of the mechanisms reported in the literature by which different nanomaterials cause toxicity in rice. The physiological and biochemical effects engendered by the nanoparticles are highlighted, focusing on rice growth and development, ENMs uptake and translocation, gene expression changes, enzyme activity modifications, and secondary metabolite alterations.
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Affiliation(s)
- Yi Wang
- The Connecticut Agricultural Experiment Station, 123 Huntington St, New Haven, CT, 06504, USA
| | - Christian Dimkpa
- The Connecticut Agricultural Experiment Station, 123 Huntington St, New Haven, CT, 06504, USA
| | - Chaoyi Deng
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX, 79968, USA
| | - Wade H Elmer
- The Connecticut Agricultural Experiment Station, 123 Huntington St, New Haven, CT, 06504, USA
| | - Jorge Gardea-Torresdey
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX, 79968, USA; Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX, 79968, USA
| | - Jason C White
- The Connecticut Agricultural Experiment Station, 123 Huntington St, New Haven, CT, 06504, USA.
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13
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Deng C, Wang Y, Navarro G, Sun Y, Cota-Ruiz K, Hernandez-Viezcas JA, Niu G, Li C, White JC, Gardea-Torresdey J. Copper oxide (CuO) nanoparticles affect yield, nutritional quality, and auxin associated gene expression in weedy and cultivated rice (Oryza sativa L.) grains. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 810:152260. [PMID: 34896498 DOI: 10.1016/j.scitotenv.2021.152260] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/30/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Weedy rice grows competitively with cultivated rice and significantly diminishes rice grain production worldwide. The different effects of Cu-based nanomaterials on the production of weedy and cultivated rice, especially the grain qualities are not known. Grains were collected from weedy and cultivated rice grown for four months in field soil amended with nanoscale CuO (nCuO), bulk CuO (bCuO), and copper sulfate (CuSO4) at 0, 75, 150, 300, and 600 mg Cu/kg soil. Cu translocation, essential element accumulation, yield, sugar, starch, protein content, and the expression of auxin associated genes in grains were determined. The grains of weedy and cultivated rice were differentially impacted by CuO-based compounds. At ≥300 mg/kg, nCuO and bCuO treated rice had no grain production. Treatment at 75 mg/kg significantly decreased grain yield as compared to control with the order: bCuO (by 88.7%) > CuSO4 (by 47.2%) ~ nCuO (by 38.3% only in cultivated rice); at the same dose, the Cu grain content was: nCuO ~ CuSO4 > bCuO > control. In weedy grains, K, Mg, Zn, and Ca contents were decreased by 75 and 150 mg/kg nCuO by up to 47.4%, 34.3%, 37.6%, and 60.0%, but no such decreases were noted in cultivated rice, and Fe content was increased by up to 88.6%, and 53.2%. In rice spikes, nCuO increased Mg, Ca, Fe, and Zn levels by up to 118.1%, 202.6%, 133.8%, and 103.9%, respectively. Nanoscale CuO at 75 and 150 mg/kg upregulated the transcription of an auxin associated gene by 5.22- and 1.38-fold, respectively, in grains of weedy and cultivated rice. The biodistribution of Cu-based compounds in harvested grain was determined by two-photon microscopy. These findings demonstrate a cultivar-specific and concentration-dependent response of rice to nCuO. A potential use of nCuO at 75 and 150 mg/kg in cultivar-dependent delivery system was suggested based on enhanced grain nutritional quality, although the yield was compromised. This knowledge, at the physiological and molecular level, provides valuable information for the future use of Cu-based nanomaterials in sustainable agriculture.
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Affiliation(s)
- Chaoyi Deng
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA; University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Yi Wang
- The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06504, USA; Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Gilberto Navarro
- Department of Physics, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Youping Sun
- Department of Plants, Soil, and Climate, Utah State University, 4820 Old Main Hill, Logan, UT 84322, USA
| | - Keni Cota-Ruiz
- MSU-DOE - Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
| | - Jose Angel Hernandez-Viezcas
- University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA; Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Genhua Niu
- Texas A&M Agrilife Research and Extension Centre at Dallas, 17360 Coit Road, TX 75252, USA
| | - Chunqiang Li
- Department of Physics, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA
| | - Jason C White
- The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06504, USA
| | - Jorge Gardea-Torresdey
- Environmental Science and Engineering Ph.D. Program, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA; University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA; Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, USA.
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14
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Wang Y, Deng C, Cota-Ruiz K, Peralta-Videa JR, Hernandez-Viezcas JA, Gardea-Torresdey JL. Soil-aged nano titanium dioxide effects on full-grown carrot: Dose and surface-coating dependent improvements on growth and nutrient quality. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 774:145699. [PMID: 33609834 DOI: 10.1016/j.scitotenv.2021.145699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 06/12/2023]
Abstract
Rutile titanium dioxide nanoparticles (nTiO2) were weathered in field soil at 0, 100, 200, and 400 mg Ti/kg soil for four months. Two types of nTiO2 with different surface coatings (hydrophilic and hydrophobic), uncoated nTiO2 (pristine), and the untreated control were included. Thereafter, carrot seeds (Daucus carota L.) were sown in those soils and grown in a growth chamber for 115 days until full maturity. A comparison was made between this and our previous unaged study, where carrots were treated in the same way in soil with freshly amended nTiO2. The responses of plants depended on the nTiO2 surface coating and concentration. The aged hydrophobic and hydrophilic-coated nTiO2 induced more positive effects on plant development at 400 and 100 mg Ti/kg soil, respectively, compared with control and pristine treatments. Taproot and leaf fresh biomass and plant height were improved by up to 64%, 40%, and 40% compared with control, respectively. Meanwhile, nutrient elements such as Fe in leaves, Mg in taproots, and Ca, Zn, and K in roots were enhanced by up to 66%, 64%, 41, 143% and 46%, respectively. However, the contents of sugar, starch, and some other metal elements in taproots were negatively affected, which may compromise their nutritional quality. Taken together, the overall growth of carrots was benefited by the aged nTiO2 depending on coating and concentration. The aging process served as a potential sustainable strategy to alleviate the phytotoxicity of unweathered nanoparticles.
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Affiliation(s)
- Yi Wang
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; University of California Centre for Environmental Implications of Nanotechnology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Chaoyi Deng
- Environmental Science and Engineering PhD Program, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; University of California Centre for Environmental Implications of Nanotechnology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Keni Cota-Ruiz
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; University of California Centre for Environmental Implications of Nanotechnology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Jose R Peralta-Videa
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; Environmental Science and Engineering PhD Program, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; University of California Centre for Environmental Implications of Nanotechnology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Jose A Hernandez-Viezcas
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; University of California Centre for Environmental Implications of Nanotechnology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Jorge L Gardea-Torresdey
- Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; Environmental Science and Engineering PhD Program, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; University of California Centre for Environmental Implications of Nanotechnology, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA.
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